A2 adjective #431 最常用 3分钟阅读

certain

You are sure that something is true.

Explanation at your level:

You use certain when you are sure. If you know something is true, you are certain. It is like saying 'I am sure'. You can say, 'I am certain about the answer.' It helps you sound very clear when you talk to your friends.

At this level, you can use certain to talk about facts. 'I am certain that the bus arrives at 8:00.' You can also use it to talk about specific things, like 'a certain book' that you really like. It is a great way to show you are confident in what you are saying.

When you reach B1, you use certain to express degrees of belief. You might say, 'I am not certain if I can go.' This shows you are thinking about possibilities. It is also used to sound a bit more formal in emails or work situations, like saying 'I need to make certain that the report is finished.'

At the B2 level, you use certain to add nuance. You might describe someone as having a 'certain quality' or 'a certain way of speaking'. This shows you are observing details. It is also common in academic writing to say 'a certain number of people' to be precise without giving an exact count.

In advanced English, certain is used to frame arguments. You might write, 'To a certain extent, the theory holds true.' This allows you to be precise while acknowledging complexity. It is a sophisticated way to qualify your statements and show critical thinking in essays or debates.

At the mastery level, you appreciate the etymological roots of certain as 'fixed'. You might use it in literary contexts to describe an 'unsettling certainty' or a 'certain air of mystery'. You understand how it functions as both a marker of truth and a tool for creating subtle, specific references in complex prose.

30秒词汇

  • Used to express being sure.
  • Used to identify something specific.
  • Adjective form only.
  • Commonly paired with 'of' or 'that'.

When you say you are certain, you are telling the world that your mind is made up. There is no room for doubt or 'maybe' in your statement. It is like standing on solid ground instead of shifting sand.

Beyond just feeling sure, we use certain to point to something specific without naming it directly. For example, if you say, 'I have a certain feeling about this,' you mean you have a specific hunch, even if you cannot quite put it into words. It is a very handy word for when you want to be precise but a bit mysterious.

The word certain has a long journey, traveling from the Latin word certus, which means 'fixed' or 'settled'. It moved through Old French before landing in English during the 13th century.

Think of it as a word that literally means 'to make something firm'. Just like a knot that is tied tight, being certain means your thoughts are tied down and not going anywhere. It is fascinating how a word that started as a way to describe physical objects became a way to describe our inner confidence.

You will hear certain used in two main ways. First, as a way to express confidence: 'I am certain he will arrive on time.' Second, as a determiner to highlight something specific: 'There is a certain charm to this old house.'

In formal settings, it sounds professional and decisive. In casual conversation, it adds a layer of depth to your descriptions. It pairs well with verbs like 'make' (make certain) and 'be' (be certain).

1. Make certain: To double-check or ensure something happens. 'Please make certain the door is locked.'
2. For certain: Used to express absolute truth. 'I know for certain that she is coming.'
3. A certain something: A quality that is hard to define. 'The painting has a certain something that draws you in.'
4. Certain as death and taxes: Something that is guaranteed to happen. 'The outcome is certain as death and taxes.'
5. To a certain extent: Partially. 'I agree with you to a certain extent.'

In British English, it is pronounced /ˈsɜːtn/, while in American English, it is /ˈsɜːrtn/. Notice the stress is on the first syllable. It rhymes with words like 'curtain' and 'certain' (which is a homophone in many accents).

Grammatically, it is an adjective that can come before a noun or after a linking verb like 'is' or 'was'. It does not have a plural form because it is an adjective, which makes it quite easy to use in sentences!

Fun Fact

It comes from the same root as 'certificate'.

Pronunciation Guide

UK /ˈsɜːtn/

Short, sharp sound.

US /ˈsɜːrtn/

R-colored vowel.

Common Errors

  • Mispronouncing the 't' as a 'd'.
  • Adding an extra syllable.
  • Stressing the second syllable.

Rhymes With

curtain certain burthen gertin certainly

Difficulty Rating

阅读 2/5

Easy to read

Writing 2/5

Easy to use

Speaking 2/5

Easy to say

听力 2/5

Easy to hear

What to Learn Next

Prerequisites

sure know think

Learn Next

ascertain certainty definitely

高级

inevitable conviction

Grammar to Know

Adjective usage

He is certain.

Determiners

A certain person.

Prepositional phrases

Certain of his success.

Examples by Level

1

I am certain.

I am sure.

Simple subject-verb-adjective structure.

1

I am certain about the time.

2

He is a certain type of person.

3

Are you certain?

4

I am certain it will rain.

5

She is certain of her choice.

6

We are certain they are here.

7

I am not certain yet.

8

Make certain you have your key.

1

I am certain that we can win.

2

There is a certain beauty in the rain.

3

She has a certain way of smiling.

4

I am certain of his success.

5

Make certain to call me later.

6

He is certain to be late.

7

To a certain degree, I understand.

8

I know for certain that he lied.

1

There is a certain irony in his words.

2

I am certain that the data is accurate.

3

She possesses a certain charm.

4

He is certain to succeed in his career.

5

We need to make certain that everyone is safe.

6

A certain number of students failed.

7

I am certain of my decision.

8

It is certain that things will change.

1

To a certain extent, the policy is flawed.

2

He spoke with a certain degree of authority.

3

There is a certain inevitability about the outcome.

4

I am certain beyond a shadow of a doubt.

5

She has a certain something that makes her unique.

6

The result is certain to be controversial.

7

We must make certain that no errors occur.

8

A certain silence filled the room.

1

The artist captured a certain melancholy in her portrait.

2

There is a certain gravitas to his performance.

3

His actions were a certain indication of his intent.

4

She felt a certain detachment from the event.

5

A certain ambiguity remains in the text.

6

He moved with a certain grace.

7

The plan is certain to be met with resistance.

8

There is a certain logic to his madness.

近义词

反义词

uncertain unsure doubtful

常见搭配

make certain
absolutely certain
fairly certain
certain amount
certain extent
certain way
certain quality
certain number
certain point
certain time

Idioms & Expressions

"Make certain"

To ensure.

Make certain you finish your homework.

neutral

"For certain"

Without doubt.

I know it for certain.

neutral

"A certain something"

An indefinable quality.

She has a certain something.

casual

"To a certain extent"

Partly.

To a certain extent, he is right.

formal

"Certain as death and taxes"

Guaranteed.

It is certain as death and taxes.

idiomatic

"Beyond a shadow of a doubt"

Totally certain.

I am certain beyond a shadow of a doubt.

formal

Easily Confused

certain vs Sure

Both mean confident.

Sure is more common.

I am sure/certain.

certain vs Certainly

Same root.

Certainly is an adverb.

I will certainly go.

certain vs Certify

Same root.

Certify is a verb.

I will certify this.

certain vs Certainty

Same root.

Certainty is a noun.

There is no certainty.

Sentence Patterns

A2

I am certain that...

I am certain that he is here.

B1

I am certain of...

I am certain of the result.

B1

A certain [noun]...

A certain man walked in.

B2

Make certain to...

Make certain to call.

C1

To a certain extent...

To a certain extent, it works.

词族

Nouns

certainty The state of being sure.

Verbs

ascertain To find out for sure.

Adjectives

certain Sure or specific.

相关

certify To make official.

How to Use It

frequency

8

Formality Scale

Formal Neutral Casual

常见错误

Using 'certainly' when you mean 'certain'. I am certain.
Certain is an adjective; certainly is an adverb.
Confusing 'certain' with 'sure'. Both are okay.
They are synonyms but 'sure' is more common in casual talk.
Using 'a certain' with plural nouns. Certain people...
Use 'a certain' only with singular nouns.
Saying 'very certain'. Absolutely certain.
Certain is an absolute adjective; use 'absolutely' instead of 'very'.
Forgetting the preposition 'of'. Certain of the outcome.
The adjective 'certain' is followed by 'of' when taking an object.

Tips

💡

Memory Palace Trick

Imagine a stamp of 'CERTAIN' on a document.

💡

When Native Speakers Use It

To sound more confident in meetings.

🌍

Cultural Insight

Often used in polite disagreement.

💡

Grammar Shortcut

Certain + of + noun.

💡

Say It Right

Don't over-pronounce the 't'.

💡

Don't Make This Mistake

Don't use 'very' with certain.

💡

Did You Know?

It shares a root with 'certify'.

💡

Study Smart

Learn it with 'uncertainty'.

💡

Professional Tip

Use it to sound firm.

💡

Quick Rule

Certain is always an adjective.

Memorize It

Mnemonic

Cert-ain: I am CERTAIN about the CERTificate.

Visual Association

A seal of approval on a document.

Word Web

Confidence Truth Specific Fixed

挑战

Use 'certain' in a sentence about your day.

词源

Latin

Original meaning: Fixed or settled.

文化背景

None.

Used often in business to show confidence.

'Certain People' by various artists Used in many legal documents

Practice in Real Life

Real-World Contexts

At work

  • I am certain about the data
  • Make certain we meet the deadline

At school

  • I am certain of the answer
  • A certain number of students

Travel

  • I am certain this is the right bus
  • A certain hotel in the city

Daily life

  • I know for certain
  • I am not certain yet

Conversation Starters

"Are you certain about your plans for the weekend?"

"Do you think there is a certain way to learn English?"

"Are you certain that it will be sunny today?"

"Is there a certain book you love?"

"Can you be certain of anything in life?"

Journal Prompts

Write about a time you were certain of something.

Describe a certain person who influenced you.

What are you certain about regarding your future?

Why is it hard to be certain sometimes?

常见问题

8 个问题

Yes.

No, use 'absolutely certain'.

Certainty.

Yes, mostly.

Yes.

It can be both formal and casual.

Sur-tin.

Uncertain.

自我测试

fill blank A1

I am ___ that it is sunny.

正确! 不太对。 正确答案: certain

Certain means sure.

multiple choice A2

What does 'certain' mean?

正确! 不太对。 正确答案: Sure

Certain means you have no doubt.

true false B1

Can you be 'certain' of a fact?

正确! 不太对。 正确答案: 正确

Yes, it means you are sure it is true.

match pairs B1

Word

意思

All matched!

These are synonyms.

sentence order B2

点击下方的词语来组成句子
正确! 不太对。 正确答案:

He is certain coming -> He is certain of coming (or He is certain to come).

fill blank B2

To a ___ extent, I agree.

正确! 不太对。 正确答案: certain

The phrase is 'to a certain extent'.

true false C1

'Certain' can mean specific.

正确! 不太对。 正确答案: 正确

Yes, 'a certain person' means a specific person.

multiple choice C1

Which is a synonym for 'ascertain'?

正确! 不太对。 正确答案: Find out

Ascertain means to discover for sure.

fill blank C2

He spoke with a ___ air of mystery.

正确! 不太对。 正确答案: certain

Used to modify the noun phrase.

true false C2

'Certain' comes from Latin 'certus'.

正确! 不太对。 正确答案: 正确

Correct, it means fixed or settled.

得分: /10

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