When you're just starting out in Chinese, you'll find words like 一定 really useful. It's an adverb that means 'certainly' or 'must'. You can use it when you want to express a strong intention or a certain outcome.
Think of it as adding emphasis to what you're saying. For example, if you say 'I 一定 want to learn Chinese,' it means you 'certainly' or 'definitely' want to learn it. It's a great word for making your statements sound more resolute.
When used as an adverb, 一定 (yī dìng) means "certainly" or "must." It expresses a strong degree of certainty or a firm obligation.
For example, you might say "你一定要来" (Nǐ yīdìng yào lái) to mean "You must come." Or, if you're very sure about something, you could say "他一定喜欢这个" (Tā yīdìng xǐhuān zhège) meaning "He certainly likes this."
Think of it as adding emphasis to the action or state described by the verb that follows it. It's often used when giving instructions, making predictions, or expressing strong beliefs.
When used as an adverb, 一定 (yīdìng) means "certainly" or "must." It expresses a strong degree of certainty or a firm obligation.
It often appears before a verb or an adjective to emphasize that something will definitely happen or that something is definitely true.
For example, you might say "我一定去" (Wǒ yīdìng qù), meaning "I will certainly go" or "I must go."
It can also be used to give advice or make a strong recommendation, like in "你一定得试试这个" (Nǐ yīdìng děi shìshi zhège), meaning "You must try this."
When used as an adverb, 一定 (yī dìng) means 'certainly' or 'must'. It expresses a strong belief or a definite requirement. You'll often see it at the beginning of a clause, or directly before the verb it modifies.
For example, if someone says “你明天一定来” (Nǐ míngtiān yīdìng lái), they mean 'You must come tomorrow'. There's no doubt about it; it's a definite expectation.
It can also be used to express a strong guess or prediction, like “他一定是迷路了” (Tā yīdìng shì mílù le), meaning 'He must be lost'. It conveys a high degree of certainty about the situation.
Remember, it implies a strong level of conviction or a necessary action, making it a very useful word for expressing certainty in various situations.
When used as an adverb, 一定 (yīdìng) conveys certainty or a strong obligation, similar to 'certainly' or 'must' in English. It emphasizes that something is bound to happen or is a necessary action. For instance, if you say '你一定喜欢' (nǐ yīdìng xǐhuan), it means 'You will certainly like it.'
It's often used to express a confident prediction or a firm requirement. For example, when you tell someone '你一定早点睡觉' (nǐ yīdìng zǎodiǎn shuìjiào), you are stating 'You must go to bed early.' It implies a stronger degree of necessity than other modal verbs like '应该' (yīnggāi, should).
When used as an adverb, 一定 (yī dìng) means 'certainly' or 'must'. It expresses a strong degree of certainty or an imperative. It is often placed before the verb. It indicates that something will definitely happen or is definitely true, or that someone is required to do something. For example, 你一定可以！ (Nǐ yīdìng kěyǐ!) means 'You certainly can!' or 'You definitely can do it!'
一定 in 30 Seconds
- Expresses certainty.
- Expresses obligation.
- Similar to 'certainly' or 'must'.
Let's talk about the Chinese word 一定 (yī dìng). It's super useful and you'll hear it all the time. Think of it as meaning 'certainly' or 'must'. It's pretty straightforward, but knowing exactly when and how to use it will make your Chinese sound much more natural.
§ What does it mean?
- Meaning 1
- Certainty or determination. When you use 一定, you're saying something is definitely going to happen or is definitely true. It's like saying 'for sure' in English.
他一定会来。
Translation hint: He certainly will come. / He definitely will come.
这本小说一定很好看。
Translation hint: This novel must be very good.
- Meaning 2
- An imperative or a strong suggestion, meaning 'must' or 'have to'. You're telling someone they absolutely should do something.
你一定要记住。
Translation hint: You must remember.
我们一定要努力学习。
Translation hint: We must study hard.
§ When to use it?
Here’s when you’ll typically use 一定:
- Expressing strong belief or prediction: When you're super confident about something, whether it's an event happening or a fact being true.
- Giving strong advice or commands: When you want to emphasize that someone absolutely needs to do something. It's stronger than just 'should'.
- Making a promise: If you say '我一定会...' (wǒ yī dìng huì...), you're making a firm promise.
Let's break down some more examples so you can really get a feel for it.
他这么用功，考试一定会及格的。
Translation hint: He's so diligent, he will certainly pass the exam.
你一定要多喝水。
Translation hint: You must drink more water. (Strong advice, maybe you're sick)
我一定会帮助你的。
Translation hint: I will certainly help you. (A promise)
So, when you want to express conviction, obligation, or a promise, 一定 is your go-to word. Keep practicing with these examples, and you'll get the hang of it in no time!
§ Basic Placement of 一定
The word 一定 (yī dìng) is an adverb, which means it usually comes before the verb in a sentence. Think of it as meaning 'certainly' or 'must'. It expresses a strong likelihood or a firm requirement.
- DEFINITION
- Certainty or Obligation
他一定会来。
Translation hint: He certainly will come. / He must come.
你一定要好好学习。
Translation hint: You must study hard.
§ Using 一定 with Negation
When you want to say 'definitely not' or 'certainly won't', 一定 comes before the negation word (like 不 (bù) or 没 (méi)).
我一定不会忘记你。
Translation hint: I certainly won't forget you.
这件事一定没问题。
Translation hint: This matter certainly has no problem. (This matter is definitely fine.)
§ 一定 and Commands/Suggestions
When you are giving a strong suggestion or a command, 一定 is often used with 要 (yào) or 得 (děi) which also mean 'to need to' or 'must'. This combination makes the obligation even stronger.
你一定要来我的生日派对！
Translation hint: You definitely must come to my birthday party!
考试前，我们一定得复习。
Translation hint: Before the exam, we definitely have to review.
§ Common Phrases with 一定
Here are some common ways you'll hear 一定 used:
一定行 (yī dìng xíng) – Definitely okay/workable
一定可以 (yī dìng kě yǐ) – Definitely can
一定对 (yī dìng duì) – Definitely correct
别担心，我们一定行！
Translation hint: Don't worry, we definitely can do it!
§ Not to be confused with specific/fixed
While 一定 can also mean 'certain' or 'fixed' as an adjective (e.g., 'a certain amount'), in this A1 context, we are focusing on its adverbial use meaning 'certainly' or 'must'. Don't worry too much about the adjective usage at this stage; mastering the adverb is your priority.
So you've learned that 一定 means 'certainly' or 'must.' That's a good start. But how do native speakers actually use it? Let's look at some common situations where you'll definitely hear this word.
§ At Work: Making Commitments and Guarantees
In a work setting, 一定 is super useful for showing commitment or making a promise. When you say you'll 一定 do something, you're telling your boss or colleagues that you absolutely will get it done.
我一定会按时完成任务。
- Translation hint
- I will certainly finish the task on time.
It's a strong way to reassure someone. Think of it as saying, "No doubt about it, consider it done."
请放心，我们一定会解决这个问题。
- Translation hint
- Please don't worry, we will definitely solve this problem.
§ At School: Expectations and Requirements
In an academic setting, 一定 often signals an expectation or a requirement. Teachers might use it to tell students what they 'must' do or what 'certainly' needs to happen.
学生们一定要按时交作业。
- Translation hint
- Students must hand in their homework on time.
It's not just a suggestion; it's a rule. You'll also hear it when talking about things that are bound to happen if certain conditions are met.
如果你努力学习，就一定会取得好成绩。
- Translation hint
- If you study hard, you will certainly get good grades.
§ In the News: Expressing Certainty and Prediction
When you're reading or listening to the news, 一定 is used to convey a high degree of certainty about future events or current situations. It often indicates that something is expected to happen, or is undeniably true based on the available information.
专家表示，经济复苏一定会持续。
- Translation hint
- Experts say that the economic recovery will certainly continue.
It gives weight to predictions or statements, making them sound more authoritative.
这项新政策对市民生活一定会有积极影响。
- Translation hint
- This new policy will certainly have a positive impact on citizens' lives.
As you can see, 一定 is a versatile word that expresses certainty, obligation, or strong likelihood across many different situations. Pay attention to how native speakers use it, and you'll quickly get the hang of it!
§ Don't confuse 一定 with 会 (huì) or 要 (yào)
Many learners, especially at the A1 level, get 一定 confused with 会 (huì) and 要 (yào). While all three can express a future action or intention, their nuances are different. 一定 implies a stronger certainty or a resolute decision, like 'definitely' or 'must'. 会 often expresses a prediction or a general future event. 要 can indicate a strong intention or a necessity.
我一定会去。 (Wǒ yīdìng huì qù.) - I will definitely go. (Strong certainty)
我明天会去。 (Wǒ míngtiān huì qù.) - I will go tomorrow. (Simple prediction/future)
我明天要去。 (Wǒ míngtiān yào qù.) - I want to go tomorrow. (Intention/Necessity)
§ Using 一定 for polite requests or suggestions
While 一定 means 'certainly' or 'must', using it directly in a request can sound a bit too forceful or even demanding, especially with people you don't know well. In English, 'You must come' can be a friendly invitation, but in Chinese, 你一定要来 (nǐ yīdìng yào lái) can sound more like an order. For polite suggestions or invitations, it's better to use softer expressions.
- Consider these alternatives for a more polite tone:
- More Polite
- 欢迎你来 (huānyíng nǐ lái) - You are welcome to come.
- Softer Suggestion
- 你可以来 (nǐ kěyǐ lái) - You can come.
你一定要来我家玩。 (Nǐ yīdìng yào lái wǒ jiā wán.) - You must come to my house to play. (Can sound demanding to some.)
欢迎你来我家玩。 (Huānyíng nǐ lái wǒ jiā wán.) - Welcome to come play at my house. (More polite invitation.)
§ Overusing 一定
Just like in English, if you say 'definitely' or 'must' all the time, it can lose its impact. While 一定 is useful for emphasizing certainty, don't overuse it. Vary your vocabulary to express different levels of certainty and obligation. Sometimes, a simple affirmation or a general statement of future action is enough.
For example, instead of always saying 我一定会 (wǒ yīdìng huì), you can sometimes use:
- 好的 (hǎo de) - Okay/Sure
- 没问题 (méi wèntí) - No problem
- 当然 (dāngrán) - Of course
我一定会完成。 (Wǒ yīdìng huì wánchéng.) - I will definitely finish it.
好的，我会完成。 (Hǎo de, wǒ huì wánchéng.) - Okay, I will finish it. (More natural in some contexts.)
Fun Fact
The character '定' (dìng) itself is a phono-semantic compound, with '宀' (mián) representing a roof (indicating a dwelling or settled place) and '正' (zhèng) giving the phonetic clue and also meaning 'upright' or 'correct.' This reinforces the idea of something being fixed or correct.
Pronunciation Guide
- mispronouncing the 'a' as in 'cat'
Difficulty Rating
Common character, simple structure.
Common character, simple strokes.
Two common tones, easy to pronounce.
Common word, distinct pronunciation.
What to Learn Next
Learn Next
Advanced
Grammar to Know
一定 + Verb: Expresses certainty or a strong intention to do something. It indicates a firm decision or a high probability.
我一定去。 (I will certainly go.)
一定 + Adjective: Emphasizes a certain quality or state, meaning 'definitely' or 'really'.
他一定很忙。 (He must be very busy.)
主语 + 一定 + 会 + 动词: This structure is used to express a strong prediction or a confident expectation that something will happen.
你一定会喜欢。 (You will definitely like it.)
一定 + 要 + 动词: This construction is used to express a strong command, necessity, or obligation, similar to 'must' or 'have to'.
你一定要来。 (You must come.)
不一定 (bù yīdìng): This phrase means 'not necessarily' or 'not for sure', indicating uncertainty or a lack of absolute certainty.
他不一定去。 (He might not go.)
Examples by Level
你一定会喜欢这个电影。
You will certainly like this movie.
一定 + 会 (will) expresses certainty about a future event.
我今天晚上一定在家学习。
I must study at home tonight.
一定 + 在 (at) + place + verb indicates a strong intention or requirement to do something at a specific location.
他一定知道这件事。
He must know about this matter.
一定 + verb suggests a strong inference or conclusion.
我们一定要早点出门。
We must leave early.
一定 + 要 (to want/to need) emphasizes a strong necessity or obligation.
你一定很累吧？
You must be very tired, right?
一定 + adjective/psychological verb + 吧 (question particle) indicates a strong assumption or guess.
这个周末我一定去北京玩。
This weekend I will definitely go to Beijing to play.
一定 + verb phrase indicates a strong personal commitment or plan.
你一定得小心。
You must be careful.
一定 + 得 (must, have to) expresses a strong obligation or necessity.
我的生日派对你一定要来。
You must come to my birthday party.
一定 + verb expresses a strong invitation or request that is expected to be fulfilled.
我一定会帮你学好中文。
I will certainly help you learn Chinese well.
你一定要记住我说的话。
You must remember what I said.
他今天一定会来。
He will certainly come today.
我们一定要努力学习。
We must study hard.
这本书你一定要看。
You certainly must read this book.
明天一定会下雨。
It will certainly rain tomorrow.
你一定要告诉我实话。
You must tell me the truth.
这件事情我一定会处理好。
I will certainly handle this matter well.
你一定要记住我的电话号码。
You certainly must remember my phone number.
这次考试你一定要好好准备。
For this exam, you certainly must prepare well.
我一定会在十点前到家。
I will certainly be home before 10 o'clock.
他一定知道这件事的真相。
He certainly knows the truth about this matter.
你放心，我一定会帮你解决问题。
Don't worry, I will certainly help you solve the problem.
这么好的机会，你一定要抓住。
Such a good opportunity, you certainly must seize it.
她生病了，我一定要去看看她。
She is sick, I certainly must go see her.
学中文一定要多听多说多练习。
To learn Chinese, you certainly must listen, speak, and practice more.
虽然任务艰巨，但我相信只要我们齐心协力，就一定能克服所有困难，取得最终的胜利。
Although the task is arduous, I believe as long as we work together, we will certainly be able to overcome all difficulties and achieve final victory.
他反复强调，这次改革的成功与否，一定程度上将决定公司未来的发展方向。
He repeatedly stressed that the success or failure of this reform will, to a certain extent, determine the future direction of the company's development.
面对如此复杂的国际局势，我们一定要保持清醒的头脑，冷静分析，谨慎决策。
Facing such a complex international situation, we must keep a clear head, analyze calmly, and make decisions cautiously.
如果你对这个项目有任何疑问，一定不要犹豫，随时可以来找我讨论。
If you have any questions about this project, you must not hesitate; you can come to me to discuss them at any time.
经过多年的不懈努力，他一定会在自己的专业领域取得非凡的成就。
After years of unremitting efforts, he will certainly achieve extraordinary accomplishments in his professional field.
这次突如其来的变故，一定给他的家庭带来了沉重的打击，我们需要给予他更多的支持。
This sudden change must have brought a heavy blow to his family; we need to give him more support.
为了确保项目的顺利进行，我们一定要提前做好周密的计划，并严格执行。
To ensure the smooth progress of the project, we must make a meticulous plan in advance and execute it strictly.
虽然这条路充满荆棘，但我坚信只要我们坚定信念，就一定能抵达成功的彼岸。
Although this road is full of thorns, I firmly believe that as long as we have firm faith, we will certainly be able to reach the other side of success.
你一定要记住我说的话，这对你来说至关重要。
You must remember what I said; this is crucial for you.
Used to emphasize the necessity or importance of an action.
经过一番深思熟虑，他一定能找出解决问题的最佳方案。
After careful consideration, he will certainly be able to find the best solution to the problem.
Indicates a high degree of certainty or confidence in an outcome.
面对这样的困境，我们一定要保持冷静，才能找到突破口。
Facing such a predicament, we must remain calm to find a breakthrough.
Expresses a firm determination or requirement in a challenging situation.
虽然任务艰巨，但我相信只要大家齐心协力，一定能顺利完成。
Although the task is arduous, I believe that as long as everyone works together, it will certainly be completed smoothly.
Conveys strong conviction and assurance of success through collective effort.
这部电影的故事情节引人入胜，你一定要找时间看看。
The plot of this movie is captivating; you must find time to watch it.
Serves as a strong recommendation or suggestion to someone.
如果今天不下雨，我们明天一定要去爬山。
If it doesn't rain today, we must go hiking tomorrow.
Used to express a conditional plan or firm intention.
他学习非常努力，这次考试一定能取得好成绩。
He studies very hard, and he will certainly get good grades on this exam.
Indicates a logical deduction or prediction based on observed facts.
为了避免再次犯错，我们一定要吸取教训，重新审视我们的策略。
To avoid making mistakes again, we must learn from our lessons and re-examine our strategy.
Emphasizes the necessity of learning from past experiences and adapting future actions.
Common Collocations
Common Phrases
你 一定 要 来。
You must come.
我 一定 会 努力。
I will certainly work hard.
他 一定 知道。
He definitely knows.
这 一定 很 好吃。
This must be very delicious.
你 一定 能 成功。
You will certainly succeed.
我 一定 帮 你。
I will certainly help you.
我们 一定 要 见面。
We must meet.
他 一定 很 忙。
He must be very busy.
你 一定 要 小心。
You must be careful.
她 一定 会 喜欢。
She will certainly like it.
Often Confused With
While both can mean 'must', '必须' emphasizes obligation, while '一定' emphasizes certainty or a firm decision.
Both mean 'certainly'. '肯定' often reflects the speaker's subjective conviction, while '一定' can be more objective or a direct instruction.
Means 'of course'. It implies something is self-evident. '一定' means 'certainly' or 'definitely' with a stronger emphasis on probability or resolve.
Grammar Patterns
Idioms & Expressions
"一定会的 (yī dìng huì de)"
definitely will
你一定会的！ (Nǐ yī dìng huì de!) (You definitely will!)
neutral"一定行 (yī dìng xíng)"
definitely can/will work
这个方法一定行。 (Zhège fāngfǎ yī dìng xíng.) (This method will definitely work.)
neutral"一定得 (yī dìng děi)"
must, have to (colloquial)
你一定得去看看。 (Nǐ yī dìng děi qù kàn kàn.) (You definitely have to go take a look.)
informal"一定不要 (yī dìng bù yào)"
must not
你一定不要忘记。 (Nǐ yī dìng bù yào wàngjì.) (You must not forget.)
neutral"有一定的 (yǒu yī dìng de)"
has a certain/definite (degree of something)
他有一定的经验。 (Tā yǒu yī dìng de jīngyàn.) (He has a certain amount of experience.)
neutral"一定程度上 (yī dìng chéngdù shàng)"
to a certain extent
这在一定程度上是正确的。 (Zhè zài yī dìng chéngdù shàng shì zhèngquè de.) (This is correct to a certain extent.)
formal"有一定道理 (yǒu yī dìng dàolǐ)"
has a certain truth/reason
你说得有一定道理。 (Nǐ shuō de yǒu yī dìng dàolǐ.) (What you said has a certain truth to it.)
neutral"一定数量 (yī dìng shùliàng)"
a certain quantity
我们需要一定数量的材料。 (Wǒmen xūyào yī dìng shùliàng de cáiliào.) (We need a certain quantity of materials.)
neutral"一定会成功 (yī dìng huì chénggōng)"
will definitely succeed
我相信你一定会成功。 (Wǒ xiāngxìn nǐ yī dìng huì chénggōng.) (I believe you will definitely succeed.)
neutral"一定没问题 (yī dìng méi wèntí)"
definitely no problem
这个任务一定没问题。 (Zhège rènwu yī dìng méi wèntí.) (This task will definitely be no problem.)
neutralEasily Confused
Many English speakers confuse '一定' with '必须' (must) because both can translate to 'must' or 'certainly'. However, '一定' implies certainty or a strong likelihood, whereas '必须' expresses a strong obligation or necessity.
'一定' is about certainty or a strong probability. '必须' is about obligation or something that is absolutely required.
他一定很忙。 (He must be very busy.) / 你一定要来。 (You definitely need to come.)
'肯定' can also mean 'certainly' or 'definitely', similar to '一定', which causes confusion for learners trying to distinguish between the nuances.
'肯定' often conveys a more subjective certainty or a firm affirmation from the speaker, while '一定' can be more objective or a direct instruction/command.
我肯定会帮你。 (I will definitely help you.) / 他肯定知道。 (He certainly knows.)
When '当然' is used to express 'of course' or 'certainly', it can overlap in meaning with '一定' in some contexts, particularly when agreeing to something.
'当然' expresses something that is self-evident or goes without saying. '一定' expresses a strong likelihood or a firm resolution.
你当然可以。 (Of course you can.) / 你当然要去了。 (Of course you should go.)
As mentioned before, '必须' directly translates to 'must' and can be easily confused with '一定' when learners are trying to express a strong need or obligation.
'必须' indicates a strong requirement or an imperative. '一定' indicates certainty, determination, or a strong suggestion.
你必须完成作业。 (You must finish your homework.) / 我们必须走了。 (We must leave.)
'必然' also means 'inevitable' or 'certain', adding another layer of confusion when trying to express certainty in Chinese.
'必然' implies an unavoidable outcome or something that is bound to happen, often with a sense of destiny or logical consequence. '一定' is more about a strong likelihood or a determined action.
成功必然会来。 (Success will certainly come.) / 这是必然的结果。 (This is an inevitable result.)
Sentence Patterns
Subj. + 一定 + Predicate
我一定去。 (I will certainly go.)
Subj. + 一定 + 要 + Verb
你一定要吃早饭。 (You must eat breakfast.)
Subj. + 一定 + 会 + Verb
他一定会来。 (He will certainly come.)
Subj. + 一定 + 是 + Noun
这一定是一本好书。 (This must be a good book.)
Subj. + 一定 + 不 + Verb
我一定不会忘记。 (I certainly won't forget.)
Subj. + 一定 + 能 + Verb
你一定能成功。 (You can certainly succeed.)
一定 + 要 + Verb
一定要小心。 (Must be careful.)
一定 + 会 + Verb
一定会好起来的。 (It will certainly get better.)
Word Family
Nouns
Adjectives
How to Use It
一定 (yī dìng) as an adverb means 'certainly' or 'must'. It indicates a strong degree of certainty or a firm requirement. You can use it to express that something will definitely happen or that someone must do something.
For example:
我一定去。 (Wǒ yīdìng qù.) - I will certainly go.
你一定要来。 (Nǐ yīdìng yào lái.) - You must come.
他今天一定很忙。 (Tā jīntiān yīdìng hěn máng.) - He must be very busy today.
A common mistake is confusing 一定 with 必须 (bìxū). While both can mean 'must', 必须 implies a stronger obligation or necessity, often from external rules or circumstances. 一定 is more about a personal conviction or a high degree of certainty.
For example:
你必须遵守交通规则。 (Nǐ bìxū zūnshǒu jiāotōng guīzé.) - You must obey traffic rules. (Strong obligation)
我一定会努力学习。 (Wǒ yīdìng huì nǔlì xuéxí.) - I will certainly study hard. (Personal conviction)
Tips
Basic Usage of 一定
一定 (yī dìng) means 'certainly' or 'must'. It's often used before a verb to express a strong intention or a high degree of certainty. Think of it as saying 'I will definitely do something' or 'This will certainly happen'.
Using 一定 for Commands/Advice
You can use 一定 to give strong advice or a command, similar to 'you must' or 'you have to'. For example, 你一定早点睡觉 (nǐ yī dìng zǎo diǎn shuì jiào) means 'You must go to bed early'.
Expressing Certainty about the Future
When you're talking about something you're confident will happen in the future, 一定 is your go-to word. For example, 他明天一定来 (tā míng tiān yī dìng lái) means 'He will definitely come tomorrow'.
一定 with 会 (huì)
You'll often see 一定 paired with 会 (huì), which also indicates future tense or possibility. When used together, 一定会 (yī dìng huì) emphasizes an even stronger certainty, meaning 'definitely will'. For example, 他一定会成功 (tā yī dìng huì chéng gōng) means 'He will definitely succeed'.
Using 一定 for 'Bound to'
In some contexts, 一定 can be translated as 'bound to' or 'sure to'. For example, 如果你努力，你一定会进步 (rú guǒ nǐ nǔ lì, nǐ yī dìng huì jìn bù) means 'If you work hard, you are bound to improve'.
Distinguishing 一定 from 应该 (yīng gāi)
While both can imply necessity, 一定 (yī dìng) implies a stronger certainty or command ('must'), while 应该 (yīng gāi) suggests a recommendation or obligation ('should'). Don't confuse them.
Adverbial Position of 一定
Remember that 一定 usually comes before the verb or adjective it modifies. Its position is important for the correct meaning.
Don't use for 'A certain amount'
While 'certain' in English can mean 'a particular but not specified amount,' 一定 (yī dìng) does not carry this meaning. For 'a certain amount,' you would use different phrases like 一些 (yī xiē) or 某个 (mǒu gè).
Practice with Positive Sentences
Start by practicing 一定 in positive sentences to express strong affirmation. For example, 我一定帮你 (wǒ yī dìng bāng nǐ) - 'I will certainly help you'.
Listen for Native Speaker Usage
Pay attention to how native speakers use 一定 in conversations. You'll notice it's a very common and useful word for expressing certainty and strong intentions. Listen to how they emphasize 'definitely' or 'must'.
Word Origin
Comes from the character '一' (yī), meaning 'one' or 'a single unit,' and '定' (dìng), meaning 'to fix,' 'to settle,' or 'certain.'
Original meaning: The combination originally conveyed the idea of being fixed or settled as one, leading to the meaning of certainty.
Sino-Tibetan, Sinitic languages, Chinese.Cultural Context
In Chinese culture, '一定' is frequently used to express strong conviction or a promise. When someone says '我一定去' (wǒ yīdìng qù), it carries more weight than a simple 'I will go'; it often implies a firm commitment. It's a common way to express certainty and reassurance in daily conversations and business dealings.
Practice in Real Life
Real-World Contexts
Expressing certainty or determination
- 我一定能做到。
- I certainly can do it.
- 这件事情我一定帮你。
- I will definitely help you with this matter.
- 我们一定会再见的。
- We will definitely meet again.
Giving or receiving a command/order/strong recommendation
- 你一定要来我家玩。
- You must come to my house to play.
- 你一定得早点睡。
- You definitely have to go to bed early.
- 我妈妈说，我出门一定要小心。
- My mom said I must be careful when I go out.
Making a promise
- 我一定不会忘记的。
- I definitely won't forget.
- 我一定说到做到。
- I will definitely do what I say.
- 你放心，我一定不会告诉别人的。
- Don't worry, I definitely won't tell anyone else.
Predicting an outcome with high confidence
- 你一定很累了吧？
- You must be very tired, right?
- 他一定知道答案。
- He must know the answer.
- 这道菜一定很好吃。
- This dish must be delicious.
Asking for confirmation or agreement about something certain
- 你一定喜欢这个礼物吧？
- You must like this gift, right?
- 你一定觉得很惊讶吧？
- You must feel very surprised, right?
- 这一定是你的手机，对吗？
- This must be your phone, right?
Conversation Starters
"你最近有什么事情是一定要做的吗？"
"你觉得学好中文，一定要做什么？"
"有没有什么电影是你一定推荐别人看的？"
"你有没有遇到过你觉得 '一定' 会发生，结果却没发生的事情？"
"如果你要给朋友一个重要的建议，你会说 '你一定要...' 什么？"
Journal Prompts
写下三件你 '一定' 要在未来一年内完成的事情，并说明原因。
描述一个你觉得 '一定' 会发生，并且让你感到兴奋的事情。
回想一个你对某件事情说 '我一定能做到'，最后也成功了的经历。
思考生活中哪些事情是 '一定' 要做的，不能拖延的。
想象你有一个非常重要的秘密，你 '一定' 不能告诉任何人。你会怎么做？
Frequently Asked Questions
10 questions一定 (yīdìng) generally means 'certainly' or 'must.' It shows that something is very sure to happen or that someone has a strong intention.
While both can refer to the future, 会 (huì) often indicates a general possibility or prediction (e.g., 'It will rain'). 一定 (yīdìng), however, conveys a much stronger sense of certainty or a firm decision (e.g., 'I will certainly go,' 'It must be him'). Think of 一定 as a more emphatic 'will' or 'must.'
Yes, absolutely! When you say '你一定要...' (nǐ yīdìng yào...), it means 'You must...' or 'You absolutely have to...' It's a strong way to give advice or a firm instruction. For example, 你一定要好好学习。 (nǐ yīdìng yào hǎo hào xuéxí.) 'You must study hard.'
Yes, it can. While its primary use is as an adverb, when used as an adjective, 一定 can mean 'definite,' 'fixed,' or 'certain.' For instance, 一定的计划 (yīdìng de jìhuà) means 'a definite plan.' However, this usage is less common for A1 learners, who should focus on its adverbial meaning first.
Yes, you would typically use 不一定 (bù yīdìng), which means 'not necessarily' or 'not for sure.' It expresses uncertainty. For example, 他不一定会来。 (tā bù yīdìng huì lái.) 'He might not necessarily come.' This directly contrasts with the certainty of 一定.
Yes, you can. When combined with modal verbs, 一定 strengthens their meaning. For example, 你一定要去。 (nǐ yīdìng yào qù.) 'You absolutely must go.' or 你一定应该去。 (nǐ yīdìng yīnggāi qù.) 'You really should go.' It adds emphasis to the obligation or suggestion.
Completely natural! 一定 is a very common word in daily Chinese. You'll hear it often to express certainty, strong intentions, or firm advice. Don't hesitate to use it.
As an adverb, 一定 usually comes before the verb or adjective it modifies, and often after the subject. For example, 我一定会去。 (wǒ yīdìng huì qù.) 'I will certainly go.' or 他一定很高兴。 (tā yīdìng hěn gāoxìng.) 'He must be very happy.'
Both 一定 and 肯定 (kěndìng) mean 'certainly' or 'definitely.' However, 肯定 can sometimes carry a stronger nuance of 'without a doubt' or 'it's a given,' often based on logical deduction or common sense. 一定 can also express a strong personal resolve or command. For A1 learners, they are often interchangeable, but recognize that 肯定 leans more towards 'factual certainty' while 一定 can also be about 'personal conviction.'
One very common pattern is 你一定要... (nǐ yīdìng yào...), meaning 'You must...' or 'You absolutely have to...' Another is 我一定会... (wǒ yīdìng huì...), meaning 'I will certainly...' or 'I promise to...' These are great to practice for everyday situations.
Test Yourself 150 questions
她___会喜欢这个礼物。
Here, '一定' (yīdìng) means 'certainly' or 'definitely'. The sentence means 'She will certainly like this gift.'
你___要多喝水。
In this context, '一定' (yīdìng) means 'must'. The sentence translates to 'You must drink more water.'
我们___能成功。
Here, '一定' (yīdìng) expresses certainty. The sentence means 'We will certainly succeed.'
明天你___要来我家。
This sentence uses '一定' (yīdìng) to convey a strong request or command, meaning 'You must come to my house tomorrow.'
他___会记得你的生日。
The sentence '他一定会记得你的生日' means 'He will certainly remember your birthday.' '一定' expresses certainty.
上课的时候，你___要听老师的话。
In this sentence, '一定' (yīdìng) conveys a strong obligation, meaning 'During class, you must listen to the teacher.'
Choose the correct sentence: My mom must be tired.
一定 (yīdìng) means 'certainly' or 'must'. So, '我妈妈一定很累' (wǒ māma yīdìng hěn lèi) means 'My mom must be tired'.
Which sentence uses '一定' correctly?
一定 (yīdìng) is an adverb and usually comes before the verb or adjective. '他一定在学校' (tā yīdìng zài xuéxiào) means 'He must be at school'.
What does '你一定会喜欢' mean?
你一定会喜欢 (nǐ yīdìng huì xǐhuān) means 'You will certainly like it' or 'You must like it'.
The sentence '他一定是中国人。' means 'He is certainly Chinese.'
一定 (yīdìng) means 'certainly' or 'must', so '他一定是中国人' (tā yīdìng shì Zhōngguó rén) translates to 'He is certainly Chinese'.
You can use '一定' to express possibility, like 'maybe'.
一定 (yīdìng) expresses certainty or a strong obligation ('must'), not possibility ('maybe').
'明天一定下雨。' means 'It certainly won't rain tomorrow.'
明天一定下雨 (míngtiān yīdìng xià yǔ) means 'It will certainly rain tomorrow.' The negative form would be '明天不一定下雨' (míngtiān bù yīdìng xià yǔ).
Listen for 'I will definitely go.'
Listen for 'You will surely like it.'
Listen for 'He must be very busy.'
Read this aloud:
我一定会帮你。
Focus: yī dìng (一定)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
你一定要吃早饭。
Focus: yào chī (要吃)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
这一定是我的。
Focus: zhè shì (这是)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Write a sentence saying 'I must go to school tomorrow.'
Well written! Good try! Check the sample answer below.
Sample answer
我明天一定要去学校。
Write a sentence saying 'He will certainly come.'
Well written! Good try! Check the sample answer below.
Sample answer
他一定会来。
Write a sentence saying 'You must eat lunch.'
Well written! Good try! Check the sample answer below.
Sample answer
你一定要吃午饭。
What does B mean?
Read this passage:
A: 你明天来我家吗？ (Are you coming to my house tomorrow?) B: 我明天一定去你家！ (I will certainly go to your house tomorrow!)
What does B mean?
B uses '一定' (yīdìng), meaning 'certainly' or 'must', to express their definite intention to go.
B uses '一定' (yīdìng), meaning 'certainly' or 'must', to express their definite intention to go.
What does the teacher want the students to do?
Read this passage:
老师说：'你们一定要多学习。' (The teacher said: 'You all must study more.')
What does the teacher want the students to do?
The teacher uses '一定' (yīdìng) with '多学习' (duō xuéxí), meaning 'study more', indicating it's a must.
The teacher uses '一定' (yīdìng) with '多学习' (duō xuéxí), meaning 'study more', indicating it's a must.
Why do they want to go out?
Read this passage:
今天天气很好，我们一定要出去玩。 (Today the weather is good, we must go out to play.)
Why do they want to go out?
The sentence states '今天天气很好' (jīntiān tiānqì hěn hǎo), meaning 'today the weather is good', as the reason for going out.
The sentence states '今天天气很好' (jīntiān tiānqì hěn hǎo), meaning 'today the weather is good', as the reason for going out.
This sentence means 'He will certainly come.' The adverb 一定 (yīdìng) comes before the verb.
This means 'You will certainly like this book.' The adverb 一定 (yīdìng) modifies the verb 喜欢 (xǐhuan, like).
This means 'We will certainly go tomorrow.' The time word 明天 (míngtiān, tomorrow) comes before 一定 (yīdìng).
Choose the correct sentence: My friend will certainly come tomorrow.
The adverb 一定 (yīdìng) indicating 'certainly' or 'must' should be placed before the verb (来, lái - to come). The auxiliary verb 会 (huì) meaning 'will' comes before 一定.
Which sentence correctly uses '一定' to express a strong obligation or necessity?
Here, 一定 (yīdìng) is used to express a strong suggestion or necessity, 'You must drink more water.' It comes before the verb phrase '多喝水' (duō hē shuǐ - drink more water).
Fill in the blank: 这本书很好看，你___要读。
The sentence expresses a strong recommendation, 'This book is very good, you must read it.' 一定 (yīdìng) is the correct word for 'must' or 'certainly' in this context. 常常 (chángcháng - often), 可能 (kěnéng - maybe), and 也许 (yěxǔ - perhaps) do not fit the meaning.
The sentence '他一定是中国人。' means 'He might be Chinese.'
The sentence '他一定是中国人。' (Tā yīdìng shì Zhōngguórén.) means 'He is certainly Chinese.' or 'He must be Chinese.' It expresses certainty, not possibility.
'明天一定会下雨。' means 'It will certainly rain tomorrow.'
'明天一定会下雨。' (Míngtiān yīdìng huì xiàyǔ.) directly translates to 'Tomorrow will certainly rain.' The adverb 一定 (yīdìng) emphasizes certainty.
In the sentence '我一定回家。', 一定 means 'sometimes'.
In '我一定回家。' (Wǒ yīdìng huí jiā.), 一定 (yīdìng) means 'I will certainly go home.' or 'I must go home.' It does not mean 'sometimes'.
Listen for 'I will definitely go.'
Listen for 'You will surely like it.'
Listen for 'He must be very busy.'
Read this aloud:
我一定会帮你。
Focus: 一
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
明天你一定要来。
Focus: 要
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
这一定很好吃。
Focus: 好
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Write a sentence saying you will definitely finish your homework today.
Well written! Good try! Check the sample answer below.
Sample answer
我今天一定做完作业。
Write a sentence advising someone that they must eat breakfast.
Well written! Good try! Check the sample answer below.
Sample answer
你一定要吃早饭。
Write a sentence saying that your friend will certainly come to the party.
Well written! Good try! Check the sample answer below.
Sample answer
我的朋友一定来派对。
What does person B mean?
Read this passage:
A: 我们明天去看电影，好不好？B: 好啊！我一定去。
What does person B mean?
一定 (yīdìng) means 'certainly' or 'must'. So, '我一定去' means 'I will certainly go'.
一定 (yīdìng) means 'certainly' or 'must'. So, '我一定去' means 'I will certainly go'.
What did the teacher tell everyone?
Read this passage:
老师说，大家考试前一定要认真复习。
What did the teacher tell everyone?
一定要认真复习 means 'must review seriously'.
一定要认真复习 means 'must review seriously'.
What is the speaker advising?
Read this passage:
你感冒了，一定要多休息。
What is the speaker advising?
一定要多休息 means 'must rest more'.
一定要多休息 means 'must rest more'.
The correct order is 'You will certainly like it.'
The correct order is 'He must be very busy today.'
The correct order is 'We must work hard.'
她今天没来上课，她___是生病了。
Based on the context, '一定' (certainly/must) is the most suitable word to express a strong deduction that she must be sick because she didn't come to class.
你___要记住，过马路要看红绿灯。
'一定' (certainly/must) is used here to emphasize the importance of remembering to look at the traffic lights when crossing the road.
明天天气预报说会下雨，我们___要带伞。
Given the weather forecast, '一定' (certainly/must) is appropriate to indicate the necessity of bringing an umbrella.
这道菜很好吃，你___要尝尝。
Here, '一定' (certainly/must) is used to strongly recommend trying the delicious dish.
他中文说得很好，___是中国人。
With his excellent Chinese, '一定' (certainly/must) suggests a high probability that he is Chinese.
去北京旅游，你___要去长城看看。
It's a strong recommendation or suggestion that one must visit the Great Wall when traveling to Beijing.
她___会喜欢这份礼物的。
“一定” expresses certainty. The sentence means 'She will certainly like this gift.'
你___要记住，过马路要小心。
“一定” here means 'must' or 'definitely need to'. The sentence means 'You must remember to be careful when crossing the road.'
我们___能完成这个任务。
“一定” indicates strong confidence or determination. The sentence means 'We can certainly complete this task.'
“你一定能成功！”这句话表达了不确定性。
“一定” expresses certainty, so the sentence means 'You will definitely succeed!', which expresses certainty, not uncertainty.
在“你一定要来参加我的生日派对”中，“一定”表示强制的请求。
In this context, “一定” means 'definitely must' or 'you absolutely have to come', indicating a strong, almost mandatory request.
“他一定会迟到”表示他可能迟到。
“他一定会迟到” means 'He will definitely be late', expressing certainty, not just a possibility.
Listen to the sentence and understand the meaning of '一定'.
Pay attention to how '一定' is used to express certainty.
Identify the speaker's level of certainty.
Read this aloud:
你一定要按时完成作业。
Focus: yī dìng
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
我一定会努力学习，取得好成绩。
Focus: nǔ lì xué xí
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
这个问题你一定能解决。
Focus: jiě jué
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
You are making plans with a friend to visit a new restaurant. Use '一定' to express that you are certain you will enjoy the food there and suggest a specific dish you both 'must' try. Write a short dialogue.
Well written! Good try! Check the sample answer below.
Sample answer
A: 我们去那家新餐厅吧！B: 好啊！我听说那里的菜很好吃，我们一定喜欢。A: 对，而且他们家的烤鸭很有名，我们一定要尝尝！ (A: Let's go to that new restaurant! B: Good idea! I heard the food there is delicious, we will certainly like it. A: Right, and their roast duck is very famous, we must try it!)
Your friend is feeling down because they didn't do well on an exam. Use '一定' to encourage them, assuring them that they 'will certainly' do better next time if they study hard. Write a short message.
Well written! Good try! Check the sample answer below.
Sample answer
别难过，这次没考好没关系。只要你下次一定努力学习，就一定能考好！ (Don't be sad, it's okay if you didn't do well this time. As long as you certainly study hard next time, you will certainly be able to do well!)
You are organizing a birthday party for a friend. Use '一定' to emphasize that everyone 'must' come and that it 'will certainly' be a fun event. Write an invitation message.
Well written! Good try! Check the sample answer below.
Sample answer
我的朋友下周生日，我们为她准备了一个派对。大家一定要来哦，到时候一定很好玩！ (My friend's birthday is next week, we are preparing a party for her. Everyone must come, it will certainly be fun then!)
根据对话，医生对病人有什么要求？ (According to the dialogue, what did the doctor ask the patient to do?)
Read this passage:
医生对病人说：你一定要按时吃药，这样病才会好得快。病人回答：好的，我一定会的。
根据对话，医生对病人有什么要求？ (According to the dialogue, what did the doctor ask the patient to do?)
医生明确要求病人“按时吃药”。 (The doctor explicitly asked the patient to 'take medicine on time'.)
医生明确要求病人“按时吃药”。 (The doctor explicitly asked the patient to 'take medicine on time'.)
小明为什么说他“一定”要把作业写完？ (Why did Xiao Ming say he 'must' finish his homework?)
Read this passage:
小明对妈妈说：妈妈，我今天晚上一定要把作业写完。妈妈笑着说：好孩子，我相信你一定能做到。
小明为什么说他“一定”要把作业写完？ (Why did Xiao Ming say he 'must' finish his homework?)
小明主动表达了完成作业的决心，所以是为了完成任务。 (Xiao Ming proactively expressed his determination to finish his homework, so it's to complete the task.)
小明主动表达了完成作业的决心，所以是为了完成任务。 (Xiao Ming proactively expressed his determination to finish his homework, so it's to complete the task.)
王经理对员工的态度是什么？ (What is Manager Wang's attitude towards the employees?)
Read this passage:
王经理对员工说：这次的项目非常重要，大家一定要认真对待，争取做到最好。我相信我们一定能成功。
王经理对员工的态度是什么？ (What is Manager Wang's attitude towards the employees?)
王经理用“一定要认真对待”和“相信我们一定能成功”表达了鼓励和信任。 (Manager Wang used 'must take it seriously' and 'believe we will certainly succeed' to express encouragement and trust.)
王经理用“一定要认真对待”和“相信我们一定能成功”表达了鼓励和信任。 (Manager Wang used 'must take it seriously' and 'believe we will certainly succeed' to express encouragement and trust.)
The correct order is Subject + Adverb (一定) + Auxiliary Verb (会) + Verb + Object.
The correct order is Subject + Time (今天) + Adverb (一定) + Verb.
The correct order is Subject + Time (明天) + Adverb (一定) + Verb + Object.
她____会喜欢这份礼物的，这是她一直想要的。
Based on the context '这是她一直想要的' (this is what she always wanted), it implies certainty, so '一定' (certainly/must) is the most suitable choice.
你今天____要完成这项任务，否则会影响整个项目的进度。
The phrase '否则会影响整个项目的进度' (otherwise it will affect the entire project's progress) indicates a strong necessity or obligation, making '一定' (must) the correct answer.
我们____会努力学习，争取取得好成绩。
The sentence expresses a firm resolve or commitment to achieve good grades, which aligns with the meaning of '一定' (certainly/must).
当你想表达“毫无疑问地会发生”时，可以使用“一定”。
“一定” (yīdìng) can indeed be used to express that something will happen without a doubt, conveying certainty.
“你一定会来吗？”这句话表达了疑问，询问对方是否可能到来。
While it asks about arrival, the use of '一定' (yīdìng) emphasizes certainty, so it's asking for confirmation of a definite arrival, not just a possibility.
在中文中，“一定”可以表示一种强制性的要求，类似于英语中的“must”。
In Chinese, '一定' (yīdìng) can indeed express a strong, mandatory requirement or obligation, similar to 'must' in English.
The speaker is emphasizing the importance of persistence in learning Chinese.
Someone is making a strong commitment to try their best.
The speaker is encouraging perseverance despite difficulties.
Read this aloud:
你一定要来参加我的生日派对！
Focus: 一 (yī) and 定 (dìng) with emphasis on the rising tone for 一 and falling tone for 定
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
我一定会把这件事情办好。
Focus: 一 (yī) and 定 (dìng) in combination, focusing on natural flow
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
学好汉语，你一定要多听多说多练。
Focus: The rhythm and stress of '多听多说多练'
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
You are making plans with a friend to visit a new art exhibition. Use '一定' to express your certainty about going and the fun you'll have.
Well written! Good try! Check the sample answer below.
Sample answer
我一定去那个艺术展览。我们一定会在那里玩得很开心！(I will certainly go to that art exhibition. We will definitely have a lot of fun there!)
Write a short message to a colleague reminding them about an important deadline. Use '一定' to emphasize the necessity of meeting it.
Well written! Good try! Check the sample answer below.
Sample answer
请你一定在明天前完成这个报告，截止日期很重要。(Please be sure to finish this report by tomorrow, the deadline is very important.)
Imagine you're giving advice to a friend who is starting a new business. Use '一定' to express confidence in their success if they work hard.
Well written! Good try! Check the sample answer below.
Sample answer
只要你努力工作，你的新事业一定能成功。(As long as you work hard, your new business will definitely succeed.)
根据医生的建议，病人应该怎么做才能让病好得快？
Read this passage:
医生对病人说：“你一定要按时吃药，这样病才会好得快。” 病人点头表示明白。他知道如果不好好服药，病情一定会恶化。医生强调了按时服药的重要性。
根据医生的建议，病人应该怎么做才能让病好得快？
医生明确指出“你一定要按时吃药，这样病才会好得快。”
医生明确指出“你一定要按时吃药，这样病才会好得快。”
小明为什么要“好好复习”？
Read this passage:
小明正在准备重要的考试，他告诉妈妈：“我一定要好好复习，争取考个好成绩。” 妈妈鼓励他说：“我相信你一定能行！” 小明听后觉得信心倍增，决定更加努力。
小明为什么要“好好复习”？
小明说“我一定要好好复习，争取考个好成绩”，表明了他的目标。
小明说“我一定要好好复习，争取考个好成绩”，表明了他的目标。
顾客们为什么“一定还会来这里吃饭”？
Read this passage:
这家餐厅的菜味道非常好，服务也特别周到。很多回头客都说：“下次我们一定还会来这里吃饭！” 经理听了很高兴，认为这是对他们餐厅的肯定。
顾客们为什么“一定还会来这里吃饭”？
文章中明确提到“这家餐厅的菜味道非常好，服务也特别周到”，这是顾客选择再次光临的原因。
文章中明确提到“这家餐厅的菜味道非常好，服务也特别周到”，这是顾客选择再次光临的原因。
The correct order is Subject (你) + Adverb (一定) + Adverb of degree (很) + Verb (喜欢) + Object (这个礼物).
The correct order is Subject (他) + Time (今天) + Adverb (一定) + Auxiliary Verb (会) + Verb (来).
The correct order is Subject (我们) + Adverb (一定) + Auxiliary Verb (要) + Adverb (努力) + Verb (学习).
鉴于目前复杂的国际形势，各国之间的合作___会面临更多挑战。
Given the complex international situation, cooperation between countries will _certainly_ face more challenges. '一定' expresses certainty.
在如此激烈的市场竞争中，想要脱颖而出，企业___要不断创新。
In such fierce market competition, to stand out, enterprises _must_ constantly innovate. '一定' expresses necessity or certainty.
如果政府不采取有效措施，贫富差距___会进一步扩大。
If the government does not take effective measures, the wealth gap _will certainly_ further widen. '一定' indicates a high degree of certainty.
为了确保项目顺利完成，我们___要严格按照计划执行。
To ensure the project is completed smoothly, we _must_ strictly follow the plan. '一定' implies a strong obligation or necessity.
面对全球气候变化的严峻挑战，各国___要携手合作才能应对。
Facing the severe challenges of global climate change, countries _must_ cooperate hand in hand to cope. '一定' emphasizes the inevitability or strong necessity.
他如此刻苦学习，这次考试___会取得优异的成绩。
He studies so diligently, he _will certainly_ achieve excellent results in this exam. '一定' expresses a strong prediction based on the given condition.
Listen for the speaker's confidence in his success.
Pay attention to the strong advice given about health.
Note the urgency and certainty regarding the task completion.
Read this aloud:
请你务必在会议前准备好所有资料。
Focus: 务必 (wùbì)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
我确信他会支持我们的计划。
Focus: 确信 (quèxìn)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
毫无疑问，这是最好的解决方案。
Focus: 毫无疑问 (háowú yíwèn)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
You are organizing a farewell party for a colleague who is moving abroad. Write a short message to your team, encouraging them to attend and mentioning that their presence will definitely make the colleague's last day special.
Well written! Good try! Check the sample answer below.
Sample answer
大家好，我们的同事李明即将前往国外发展。为了表达我们的不舍和祝福，我们计划在本周五下午五点在公司咖啡厅为他举办一个简单的送别会。希望大家都能抽出时间出席，你们的到来一定会让李明的最后一天变得特别而难忘。
Your friend is hesitant about pursuing a challenging but promising career opportunity. Write a short encouraging message, telling them that with their talent and hard work, they will definitely succeed.
Well written! Good try! Check the sample answer below.
Sample answer
嗨，我知道这个机会看起来很有挑战性，但以你的能力和努力，你一定能克服所有困难并取得成功。不要犹豫，大胆去尝试吧！我支持你。
You are explaining to a new intern that they must follow all safety protocols in the laboratory. Write a sentence emphasizing the necessity of adhering to these rules.
Well written! Good try! Check the sample answer below.
Sample answer
在实验室工作时，你一定要严格遵守所有的安全规程，这是为了你自身的安全和实验室的秩序。
根据这段文字，关于网络购物，我们最应该注意什么？
Read this passage:
现代社会，网络购物已经成为人们生活中不可或缺的一部分。然而，在享受便捷的同时，我们也一定不能忽视信息安全和个人隐私保护。选择信誉良好的平台，使用复杂的密码，并定期检查账户活动，都是保障自身权益的重要措施。
根据这段文字，关于网络购物，我们最应该注意什么？
文章中明确提到“我们也一定不能忽视信息安全和个人隐私保护”，并列举了保障措施。
文章中明确提到“我们也一定不能忽视信息安全和个人隐私保护”，并列举了保障措施。
这段文字强调了什么对于应对气候变化的重要性？
Read this passage:
面对全球气候变化的严峻挑战，各国政府和民众都必须采取切实有效的行动。减少碳排放，发展可再生能源，推行循环经济模式，这些都一定能为地球的未来带来积极的改变。只有共同努力，才能实现可持续发展。
这段文字强调了什么对于应对气候变化的重要性？
文章开头就指出“各国政府和民众都必须采取切实有效的行动”，强调了共同努力的重要性。
文章开头就指出“各国政府和民众都必须采取切实有效的行动”，强调了共同努力的重要性。
根据这段文字，学习中文成功的关键是什么？
Read this passage:
学习一门新语言，尤其是像中文这样复杂的语言，一定需要持之以恒的毅力。刚开始可能会觉得困难重重，但只要每天坚持练习，多听多说，你会发现自己的进步是显而易见的。相信自己，你一定能掌握它。
根据这段文字，学习中文成功的关键是什么？
文章提到“只要每天坚持练习，多听多说，你会发现自己的进步是显而易见的”，强调了坚持练习的重要性。
文章提到“只要每天坚持练习，多听多说，你会发现自己的进步是显而易见的”，强调了坚持练习的重要性。
鉴于目前复杂的国际形势，各国之间的合作与对话是___的。
这里的“一定”表示某种情况或结果是必然的、不可避免的，强调客观规律性，而非主观的肯定。
面对前所未有的挑战，我们___要发挥集体智慧，共同寻找解决方案。
“一定”在这里表达的是一种坚定的决心和信念，强调行动的必要性和不可动摇性，语气比“必须”更强调主观意愿。
经过反复推敲和实验，这项技术革新___会为行业带来颠覆性的影响。
“一定”在此处表示对未来结果的充分肯定和预测，基于客观事实和推理，语气坚定。
为了实现可持续发展目标，我们在经济增长的同时，___要注重环境保护。
此处的“一定”强调的是做某事的必要性和重要性，带有劝告和强调的语气，比“务必”更侧重于必然性。
尽管道路崎岖，但他坚信只要持之以恒，___能到达成功的彼岸。
“一定”在这里表达的是一种强烈的信心和信念，认为某件事情必然会发生或达到，是主观上的肯定。
你对这个项目的贡献举足轻重，公司___会给予你应有的奖励。
“一定”在此处表示对承诺或预期结果的肯定，强调说话人对结果的把握和信心。
Choose the most appropriate response. 你们的团队一定会成功吗？
The question asks if the team will certainly succeed. '是的，我们对此充满信心。' (Yes, we are full of confidence about it.) is the most appropriate and positive answer that aligns with the certainty implied by '一定'.
Which sentence uses '一定' to express a strong obligation or command?
'你一定要记住我的话。' (You must remember my words.) uses '一定' to convey a strong obligation or command. The other options express probability or deduction.
Which of the following scenarios best reflects the use of '一定' to indicate a high degree of probability based on evidence?
'他迟到了，一定是交通堵塞了。' (He's late, it must be a traffic jam.) uses '一定' to deduce a highly probable reason based on the evidence of him being late. The other options express obligation, intention, or a prediction without specific evidence.
The sentence '你一定不会忘记我们的约定。' means 'You certainly won't forget our appointment.'
'一定不会' means 'certainly won't' or 'definitely won't', making the statement 'You certainly won't forget our appointment.' a correct interpretation.
In the sentence '这件衣服一定很贵。', '一定' implies that the speaker has definite proof of the price.
In '这件衣服一定很贵。' (This piece of clothing must be very expensive.), '一定' expresses a strong inference or deduction based on appearance or knowledge, not necessarily definite proof. The speaker is highly confident but might not have exact information.
The phrase '一定要' can be used interchangeably with '应该' in all contexts.
'一定要' (must/certainly) implies a stronger necessity or certainty than '应该' (should/ought to). While there can be some overlap, they are not interchangeable in all contexts, as '应该' suggests advisability while '一定要' suggests a stronger requirement or high probability.
Listen for the speaker's certainty about his success.
Listen for the important advice given about health.
Listen for the speaker's excitement about an upcoming event.
Read this aloud:
你一定要来参加我的生日派对！
Focus: 一 (yī), 定 (dìng)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
我一定会尽力帮助你的。
Focus: 尽力 (jìnlì), 帮助 (bāngzhù)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
Read this aloud:
这次的考试我一定会通过的。
Focus: 考试 (kǎoshì), 通过 (tōngguò)
You said:
Speech recognition is not supported in your browser. Try Chrome or Edge.
The correct order is subject + 一定 + auxiliary verb + verb.
The correct order is subject + 一定 + auxiliary verb + adverb + verb.
The correct order is subject + 一定 + verb + object + 的.
/ 150 correct
Perfect score!
Summary
Remember that '一定' shows something is certain or has to happen.
- Expresses certainty.
- Expresses obligation.
- Similar to 'certainly' or 'must'.
Basic Usage of 一定
一定 (yī dìng) means 'certainly' or 'must'. It's often used before a verb to express a strong intention or a high degree of certainty. Think of it as saying 'I will definitely do something' or 'This will certainly happen'.
Using 一定 for Commands/Advice
You can use 一定 to give strong advice or a command, similar to 'you must' or 'you have to'. For example, 你一定早点睡觉 (nǐ yī dìng zǎo diǎn shuì jiào) means 'You must go to bed early'.
Expressing Certainty about the Future
When you're talking about something you're confident will happen in the future, 一定 is your go-to word. For example, 他明天一定来 (tā míng tiān yī dìng lái) means 'He will definitely come tomorrow'.
一定 with 会 (huì)
You'll often see 一定 paired with 会 (huì), which also indicates future tense or possibility. When used together, 一定会 (yī dìng huì) emphasizes an even stronger certainty, meaning 'definitely will'. For example, 他一定会成功 (tā yī dìng huì chéng gōng) means 'He will definitely succeed'.
Related Content
This Word in Other Languages
More general words
一下儿
A1a bit, a moment
点儿
A1a little bit
有点儿
A1a little, somewhat (negative connotation)
一下
A2A bit; a moment (used after a verb).
一点儿
A1a little, a bit
一会儿
A1a moment, a while
一部分
B1part; portion; minority
异样
B1different; unusual; strange
关于
A1about, concerning
快要
A2to be about to (happen)
