When you say "I can't swim," it means you are
not able to swim. You do not have the skill or the ability to do it.
It's like saying "I am unable to swim."
You can also use 'can't' to say something is impossible. For example, "That can't be true!" means you think it's impossible for it to be true.
Sometimes, 'can't' means something is not allowed. For instance, "You can't park here" means parking in that spot is prohibited.
At the C1 level, learners demonstrate a nuanced understanding of modal verbs like 'can't', recognizing its multifaceted roles beyond simple inability. While 'can't' fundamentally conveys impossibility or prohibition, advanced speakers appreciate its use in expressing strong disbelief or a logical deduction that something is not true.
For instance, 'He can't be serious' implies a strong conviction that something is implausible, rather than a physical inability. Furthermore, 'can't' is crucial in constructing conditional sentences where an outcome is impossible under certain circumstances. Mastery at this level involves accurately interpreting and employing 'can't' in complex grammatical structures and subtle communicative contexts, distinguishing it from other negative constructions like 'must not' or 'may not' based on the degree of certainty and the nature of the constraint.
can’t 30秒了解
- Expresses inability to do something.
- Indicates something is impossible.
- Shows something is not allowed.
§ Understanding 'can't'
- Definition
- The word 'can't' is the contraction of 'cannot'. It is used to express that someone is unable to do something or that something is impossible or prohibited.
'Can't' is a fundamental modal verb in English, used to convey inability, impossibility, or prohibition. It's a contraction of 'cannot', making it a more common and informal choice in everyday conversation. Understanding its nuances is crucial for expressing limitations and restrictions effectively.
§ Expressing Inability
The most common use of 'can't' is to state that someone or something is unable to perform an action. This can refer to physical, mental, or skill-based limitations.
I can't lift this heavy box.
She can't understand French very well.
My computer can't connect to the internet right now.
§ Indicating Impossibility
'Can't' can also be used to suggest that something is impossible or highly improbable, often based on logic or evidence.
It can't be true! I saw him just yesterday.
That story can't be real; it sounds too fantastical.
§ Expressing Prohibition
When used in this context, 'can't' means that something is not allowed or is against the rules.
You can't park your car here.
We can't enter without a ticket.
§ 'Can't' vs. 'Cannot'
Both 'can't' and 'cannot' mean the same thing, but 'can't' is much more common in spoken English and informal writing. 'Cannot' is generally considered more formal and emphatic.
- 'Can't': Used in everyday conversations, emails to friends, and informal texts. It's concise and flows naturally.
- 'Cannot': Preferred in formal documents, academic writing, or when you want to emphasize the impossibility or prohibition.
I can't believe it! (Informal)
The terms and conditions state that users cannot share their passwords. (Formal)
§ Similar words and when to use this one vs alternatives
- Alternatives for Inability
- 'Unable to': More formal than 'can't'.
I am unable to attend the meeting.
- 'Don't know how to' / 'Am not good at': Used for skill-based inability.
I don't know how to swim.
- 'Unable to': More formal than 'can't'.
- Alternatives for Impossibility
- 'Impossible': A direct and strong statement of impossibility.
It's impossible to finish this in one day.
- 'No way' / 'Unlikely': More informal ways to express disbelief or low probability.
No way he won the lottery!
- 'Impossible': A direct and strong statement of impossibility.
- Alternatives for Prohibition
- 'Must not' / 'Mustn't': Stronger and more formal, often for rules or regulations.
You must not feed the animals.
- 'Are not allowed to' / 'Are forbidden to': Explicitly states a rule or restriction.
Guests are not allowed to smoke indoors.
- 'Should not' / 'Shouldn't': Advises against an action, but is less absolute than 'can't' or 'must not'.
You shouldn't stay up too late.
- 'Must not' / 'Mustn't': Stronger and more formal, often for rules or regulations.
In summary, 'can't' is a versatile and commonly used modal verb. Its informal nature makes it ideal for everyday communication, while its various applications allow you to express inability, impossibility, and prohibition clearly and concisely. Choosing between 'can't' and its alternatives often depends on the level of formality and the specific nuance you wish to convey.
按水平分级的例句
如何使用
The modal verb 'can't' is a contraction of 'cannot'. It is used to express inability, impossibility, or prohibition.
- Inability: 'I can't swim.' (I am not able to swim.)
- Impossibility: 'That can't be true.' (It is impossible for that to be true.)
- Prohibition: 'You can't park here.' (Parking here is not allowed.)
- Using 'can not' instead of 'can't' in informal contexts: While 'can not' is grammatically correct, 'can't' is much more common in everyday speech and writing.
- Confusing 'can't' with 'don't have to': 'Can't' implies inability or prohibition, whereas 'don't have to' implies a lack of necessity. For example, 'I can't go' means I am unable to go, while 'I don't have to go' means it's not necessary for me to go.
- Misplacing the negative: The negative particle is 'not' and it combines with 'can' to form 'cannot' or 'can't'. Avoid phrases like 'I can no do it.'
常见问题
10 个问题While 'can't' is widely understood, it's generally best to use 'cannot' in formal writing to maintain a more formal tone. 'Cannot' is preferred in academic papers, official reports, and other formal documents.
The main difference lies in their meaning. 'Can't' expresses inability or impossibility (e.g., 'I can't swim'). 'Don't' (or 'do not') is used to express negation of an action or state (e.g., 'I don't like coffee').
Yes, absolutely! 'Can't' can indicate that something is prohibited or not allowed. For example, 'You can't park here' means parking is forbidden.
Yes, 'can't' always carries a negative meaning, expressing an inability, impossibility, or prohibition. It's the negative form of 'can'.
The pronunciation of 'can't' is generally /kænt/ in American English and /kɑːnt/ in British English. The 'a' sound differs, but the 't' is usually pronounced.
No, 'can't' is a modal verb, and modal verbs are typically followed directly by the base form of another verb, without 'to'. For example, 'I can't go' is correct, not 'I can't to go'.
A common mistake is using 'can not' as two separate words when it should be 'cannot' (one word) in formal contexts, or 'can't' (contraction) in informal contexts. Another mistake is confusing it with 'don't' or 'won't'.
Yes, several! For example, 'I can't wait' (meaning you're excited for something), 'I can't help but laugh' (meaning you have to laugh), or 'You can't be serious!' (expressing disbelief).
Absolutely! For instance, if someone tells you surprising news, you might say, 'That can't be true!' to express your disbelief or shock.
Depending on the context, synonyms for 'can't' could include 'unable to,' 'impossible,' 'forbidden,' 'prohibited,' or 'not allowed.' However, 'can't' is quite versatile on its own.
自我测试 72 个问题
Which sentence uses 'can't' correctly?
'Can't' is followed by the base form of the verb. 'Swim' is the base form.
What does 'I can't hear you' mean?
'Can't' means 'cannot' or 'unable to'.
Choose the correct sentence:
Fish are not able to walk.
The sentence 'I can't speak French' means I am able to speak French.
'Can't' means 'cannot', so 'I can't speak French' means I am unable to speak French.
You can use 'can't' to say something is impossible.
'Can't' is used to express that something is impossible, for example, 'That can't be true!'.
'We can't go to the party' means we are allowed to go to the party.
'Can't' means 'not allowed' or 'prohibited' in this context.
This sentence expresses an inability to swim.
This sentence expresses that he is unable to come today.
This sentence expresses that parking is prohibited in this location.
I'm sorry, I ___ help you right now. I'm very busy.
'Can't' is the correct contraction of 'cannot', indicating inability.
He ___ swim very well because he never learned.
'Can't' indicates that he is unable to swim.
We ___ go to the party tonight. We have other plans.
'Can't' indicates that they are unable to go due to other commitments.
She ___ speak French, but she can speak Spanish.
'Can't' expresses her inability to speak French.
You ___ park your car here. It's a no-parking zone.
'Can't' indicates that parking here is prohibited.
I'm sorry, I ___ hear you. The music is too loud.
'Can't' indicates an inability to hear due to the loud music.
Listen for the speaker's frustration about traffic.
Listen for the reason why she won't attend the meeting.
Listen for what they are currently unable to purchase.
Read this aloud:
I can't imagine living anywhere else.
Focus: can't
你说的：
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Read this aloud:
You can't always get what you want.
Focus: can't, want
你说的：
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Read this aloud:
They can't decide where to go on vacation.
Focus: can't, decide
你说的：
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Imagine you have a friend who is feeling discouraged because they can't achieve a certain goal. Write a short email to them offering encouragement and suggesting ways they can overcome the obstacles they are facing. Use 'can't' at least once in your email.
Well written! Good try! Check the sample answer below.
Sample answer
Subject: Don't give up! Hi [Friend's Name], I heard you're feeling a bit down because you can't seem to reach your goal. I understand it can be frustrating when things are difficult, but please don't give up! Maybe we can break down the goal into smaller steps, or try a different approach. Remember, I'm here to support you. Let's chat soon. Best, [Your Name]
Write three sentences describing things you wish you could do but currently can't. Explain why you can't do them and what you would need to do to achieve them.
Well written! Good try! Check the sample answer below.
Sample answer
I wish I could speak fluent Spanish, but I can't because I haven't dedicated enough time to practicing. To achieve this, I would need to take more classes and practice daily with native speakers. I also wish I could play the piano, but I can't because I've never had lessons. I would need to find a teacher and commit to regular practice sessions. Finally, I wish I could travel the world, but I can't right now due to financial limitations. I would need to save more money and plan my trips carefully.
You are making a list of rules for a new community garden. Write five rules using 'can't' to indicate prohibited actions.
Well written! Good try! Check the sample answer below.
Sample answer
Community Garden Rules: 1. You can't pick flowers or vegetables from other members' plots without permission. 2. You can't leave trash or litter in the garden area. 3. You can't bring pets into the garden that aren't on a leash. 4. You can't use chemical pesticides that harm beneficial insects. 5. You can't play loud music that might disturb other gardeners.
What was Sarah's main problem regarding her new job?
Read this passage:
Sarah was excited about her new job, but there was one problem: she couldn't drive a car. Her office was quite far from her home, and public transportation wasn't always reliable. She knew she had to learn to drive soon if she wanted to keep her job and have more independence. She decided to sign up for driving lessons next month.
What was Sarah's main problem regarding her new job?
The passage clearly states, 'She couldn't drive a car.'
The passage clearly states, 'She couldn't drive a car.'
Why was the old computer a problem for John?
Read this passage:
The old computer was so slow that it couldn't run most modern software. John tried to upgrade its memory, but it didn't help much. He realized he couldn't keep using it for his work, which required faster processing. He started saving money for a new one.
Why was the old computer a problem for John?
The passage says, 'it couldn't run most modern software,' and 'he couldn't keep using it for his work, which required faster processing.'
The passage says, 'it couldn't run most modern software,' and 'he couldn't keep using it for his work, which required faster processing.'
Why did the friends decide to postpone their hiking trip?
Read this passage:
A group of friends planned a hiking trip, but the weather forecast suddenly changed. It predicted heavy rain and strong winds for the entire weekend. They discussed their options, and finally, Tom said, 'We can't go hiking in this weather; it's too dangerous.' Everyone agreed, and they decided to postpone the trip.
Why did the friends decide to postpone their hiking trip?
Tom explicitly states, 'We can't go hiking in this weather; it's too dangerous,' and everyone agreed.
Tom explicitly states, 'We can't go hiking in this weather; it's too dangerous,' and everyone agreed.
This sentence expresses an inability or impossibility for him to attend the party.
This sentence indicates that parking is prohibited in this location.
This sentence expresses disbelief about the speed at which time passes.
Choose the sentence where 'can't' is used to express impossibility.
In this sentence, 'can't be true' expresses that the speaker believes something is impossible or highly improbable.
Which sentence uses 'can't' to indicate a lack of ability?
Here, 'can't reach' denotes a physical inability to perform the action.
Select the sentence where 'can't' implies prohibition.
'Can't smoke' clearly indicates that smoking is not allowed due to a rule or regulation.
The sentence 'I can't believe how much she's grown!' uses 'can't' to express a lack of ability.
In this context, 'can't believe' expresses surprise or astonishment, not a lack of ability to believe something.
If someone says 'I can't make it to the meeting,' they are stating that they are unable to attend.
'Can't make it' is a common idiom meaning to be unable to attend an event.
The phrase 'It can't be helped' indicates that a situation is forbidden.
'It can't be helped' means that there is nothing one can do to change or avoid a situation, implying unavoidability, not prohibition.
The climbers are facing a difficult challenge.
There's a legal obstacle preventing the company's action.
The weather is making the rescue operation difficult and risky.
Read this aloud:
Due to unforeseen circumstances, I can't attend the conference next week as planned.
Focus: can't, attend, planned
你说的：
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Read this aloud:
You can't expect to achieve such ambitious goals without putting in a significant amount of effort.
Focus: can't, expect, ambitious
你说的：
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Read this aloud:
I can't believe how quickly the time has passed since we last met; it feels like only yesterday.
Focus: can't, believe, passed
你说的：
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The sentence structure starts with the subject 'We', followed by the modal verb 'can't', the main verb 'negotiate', and then the prepositional phrase 'without further details' to complete the meaning.
The correct order is 'I' (subject) + 'can't' (modal verb) + 'understand' (main verb) + 'their decision' (object) + 'at all' (adverbial phrase).
The sentence begins with the subject 'He', followed by the negative modal verb 'can't', the verb 'reconcile', and then the object phrase 'his ambitions' and the prepositional phrase 'with the current reality'.
The complex algorithms were so intricately designed that even seasoned experts _____ fully grasp their implications without extensive study.
In this context, 'couldn't' (the past tense of can't) indicates an inability to fully grasp the implications, which fits the meaning of the original word 'can't' expressing inability.
Despite their best efforts, the team _____ reconcile the conflicting data sets, leading to a significant delay in the project.
The past tense 'couldn't' is appropriate here as the sentence describes a past event where the team was unable to reconcile data.
The scientific community generally agrees that one _____ simply dismiss such compelling evidence without rigorous peer review.
Here, 'can't' conveys the general impossibility or prohibition of dismissing evidence without proper procedure, aligning with the definition of 'can't'.
Given the strict regulations, the company _____ proceed with the proposed expansion until all environmental impact assessments are completed.
'Can't' correctly indicates that the company is currently unable to proceed due to existing regulations.
The detective stated that, based on the evidence presented, the suspect _____ possibly have committed the crime alone.
The context implies a past impossibility determined by the evidence, making 'couldn't' the suitable choice.
Even with significant investment, some argue that the technology _____ ever truly replicate human consciousness.
'Can't' expresses the perceived impossibility of the technology replicating human consciousness, regardless of investment.
The company's rigid policy dictates that employees ___ deviate from established protocols, even in emergencies.
The context implies an inability or prohibition due to a rigid policy, making 'can't' the most appropriate choice to convey impossibility or lack of permission.
Despite their extensive research, scientists ___ definitively explain the anomalies observed in the deep-sea trenches.
The present tense 'can't' indicates a current inability to explain, aligning with the ongoing nature of scientific inquiry. 'Couldn't' suggests a past inability.
Even with significant investment, the startup ___ realistically compete with established tech giants in terms of market share.
The word 'realistically' highlights an inherent impossibility or extreme unlikelihood, making 'can't' the best fit to express this fundamental limitation.
The sentence 'You can't expect immediate results from complex societal changes' implies a complete impossibility of any results.
The sentence indicates that immediate results are not to be expected, but it does not preclude the possibility of results occurring over a longer period. It suggests a lack of immediate capability, not a total absence of any outcome.
If someone says 'I can't fathom why he would make such a decision,' they are expressing an inability to comprehend, not a physical impossibility.
In this context, 'can't fathom' refers to a mental or intellectual inability to understand or grasp the reasoning behind the decision, rather than a literal physical restriction.
The phrase 'We can't afford to make any more mistakes' solely refers to a financial inability to bear further costs.
While 'can't afford' often relates to finances, in this context, it broadly implies that further mistakes are unacceptable due to potential negative consequences (reputational, strategic, etc.), not just financial ones.
Despite her undeniable talent and rigorous training, she ___ quite grasp the profound implications of quantum entanglement, even after years of dedicated study.
The context implies an inability to understand, making 'can't' the appropriate choice to express this impossibility.
The newly discovered ancient manuscript is so fragile that experts fear they ___ fully decipher its cryptic script without causing irreparable damage.
The sentence suggests an impossibility or a severe restriction on deciphering the script without damage, so 'can't' fits best.
Given the unprecedented complexity of the geopolitical landscape, one ___ help but wonder if any single nation can truly navigate these turbulent waters unscathed.
The phrase 'can't help but wonder' is a common idiom expressing an unavoidable thought or feeling.
The abstract philosophical treatise delved into such abstruse concepts that many readers, even those with advanced degrees, found they ___ fully articulate its central thesis.
The difficulty of the concepts suggests an inability to articulate the thesis, making 'can't' the correct choice.
Even with the most sophisticated simulation models, scientists admit they ___ definitively predict the long-term ecological impact of deep-sea mining operations.
The sentence indicates an inability to make a definitive prediction, so 'can't' is the appropriate word.
The pervasive sense of existential ennui articulated by the postmodern author was so profound that many critics felt they ___ truly encapsulate its essence in a mere review.
The profundity of the ennui implies an inability to encapsulate its essence in a review, thus 'can't' is suitable.
/ 72 correct
Perfect score!
Summary
The term 'can't' is a contraction of 'cannot' used to express inability, impossibility, or prohibition.
- Expresses inability to do something.
- Indicates something is impossible.
- Shows something is not allowed.
