B1 Verb Moods 12 min read 简单

Can: 表达能力 (Can)

掌握 can 让你自信表达能力和请求，它是你口语中的 ability 助推器。
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Grammar Rule in 30 Seconds

Use 'can' to talk about skills, physical abilities, or things you know how to do right now.

  • No 'to' after can: 'I can swim', not 'I can to swim'.
  • No '-s' for he/she/it: 'She can sing', not 'She cans sing'.
  • Use 'can't' for negatives: 'I can't drive' is the standard contraction.
👤 + can + 🏃‍♂️ (Base Verb)

Overview

你会做后空翻吗？或者哪怕只是烤出个还凑合的酸种面包？不管怎样，你都会用到 can。这个小词在英语里简直就是终极超能力。它是谈论技能和能力的必备神器。无论你是在吹嘘游戏里的高分，还是在 Zoom 面试中列举你的技能，can 都是你最好的朋友。它简单、快速，而且不管是谁在说话，它都保持原样。你不需要担心复杂的词尾变化或奇怪的改动。它是动词里的“瑞士军刀”。从身体素质到脑力天赋，它全都能搞定。在这本指南里，我们会确保你像专家一样使用它。不再有猜测，不再有尴尬的错误，只有清晰、自信的英语。而且，这比解释你为什么还没学会煮意大利面（还不煮煳）要容易得多。

How This Grammar Works

把 can 想象成一个“情态动词”。这只是一个高级点的说法，意思它是个帮手。它帮助主动作动词展示出什么是可能的。最酷的部分是什么？它很懒。它永远不会改变它的形式。你不需要为 he(m) 或 she(f) 加 -s。你不需要为过去式加 -ed。它就一直保持 can。它就像那个每次聚会都穿同一件连帽衫的朋友，永远都很合身。你也永远不要在它后面用 to。是 can swim，而不是 can to swim。主动词保持其最简单的形式。这会让你的生活轻松得多。你可以专注于你想表达的内容，而不是语法计算。它非常适合发简讯和快速交谈。记住：can + 动词原形 = 成功。它是英语语法里最接近“秘籍”的东西。要是学弹吉他也这么简单就好了！

Formation Pattern

1
用 can 来造句就像搭乐高积木。你只要把它们卡在一起就行了。这是成功的秘密配方：
2
从 Subject 开始。这是做动作的人或物。（I, You, We, They, He, She, It）。
3
加上 Can。这永远不会改变。对每个人来说都是一样的。
4
加上 Base Verb。这是没有任何额外词尾的动词。没有 -ing，没有 -s，也没有 -ed。
5
（可选）加上句子的其余部分。
6
对于否定句，只需加上 not。我们通常把它们合并成 can't。当你和朋友聊天时，这听起来要自然得多。对于疑问句，你只需要交换主语和 can 的位置。这就像一个小舞步。
7
Conjugation Table
8
Form | Example | Translation
9
Positive | I can code | 我有写代码的技能
10
Negative | She can't sing | 她没有唱歌的技能
11
Question | Can they play? | 他们有玩的能力吗？
12
Short Yes | Yes, I can | 确认能力
13
Short No | No, she can't | 否定能力

When To Use It

在现在时态中，我们使用 can 来表达三种主要的“口味”或能力。
  • General Skills：这些是你学到的东西。想想写代码、说西班牙语或开车。“I can drive an Uber.”
  • Physical Abilities：你的身体现在能做的事情。“He can run a marathon.” 或者 “I can touch my toes”（运气好的话）。
  • Mental Abilities：你的大脑能做的事情。“She can solve complex math problems.”
你会在社交媒体上经常用到它。想象一下 Instagram 的配文：“I can finally cook a five-course meal!” 或者 TikTok 的评论：“How can you dance like that?” 它对找工作也至关重要。在 Zoom 面试中，你可能会说：“I can manage large teams efficiently.” 它是自信的语言。只是别用它来承诺你实际上做不到的事情，比如 “I can finish this project in five minutes.” 咱俩都知道那是谎话。

Common Mistakes

即使是专家有时也会栽跟头。以下是要避免的最常见的“捂脸”瞬间：
  • The To Trap：千万别说 “I can to swim”。这听起来像你在用力过猛。直接说 “I can swim”。
  • The Third Person S：别说 “He cans cook”。这听起来像他正把食物装进金属罐头里。说 “He can cook”。
  • The Past Tense Mix-up：Can 只用于现在。如果你在谈论童年，请使用 could。
  • The Double Modal：别说 “I will can go”。改用 “I will be able to go”。Can 不喜欢和其他助动词共享聚光灯。
  • Double Negatives：避免说 “I can't do nothing”。用 “I can't do anything”。这会让你听起来聪明得多。

Contrast With Similar Patterns

有时 can 有个名叫 be able to 的表亲。他们做的工作几乎一样，但感觉不同。
  • Can：这是那个“酷酷的”表亲。它非正式、快速，且 90% 的时间都在被使用。和朋友、家人在一起时，以及在大多数电子邮件中都可以使用它。
  • Be able to：这是那个“穿西装打领带”的表亲。它更正式。你会在官方文件或 can 在语法上行不通时（比如在 will 之后）使用它。
例子：“I can help you”（自然）对比 “I am able to help you”（非常正式/呆板）。
还有一个 know how to。我们专门用它来表达学到的技能。“I know how to fix a computer” 暗示你学习过它。“I can fix a computer” 只是意味着你有这个能力。大多数时候，can 是赢家，因为它更短。而且老实说，我们在移动中发信息时都喜欢更短的句子。

Quick FAQ

Q

cannot 和 can't 是一样的吗？

是的，但 cannot 非常正式。你一生中 99% 的时间都在用 can't。它能帮你省时又省力。

Q

我可以用 can 来表示许可吗？

可以！你可以说 “Can I borrow your charger?” 这很常见也很友好。

Q

为什么我们不说 “I am canning”？

因为 can 是情态动词。它没有 -ing 形式。如果你需要这种表达，请使用 “being able to”。

Q

Does can work for future ability?

通常我们使用 “will be able to”。但是，对于预定的活动，我们有时会用 can。“I can meet you tomorrow at 5.”

Q

如何强调我“真的”能做某事？

你可以说 “I can indeed” 或 “I definitely can”。只是别吼出来，那样很奇怪。

Present Tense of 'Can'

Subject Affirmative Negative Question
I
can
can't / cannot
Can I...?
You
can
can't / cannot
Can you...?
He/She/It
can
can't / cannot
Can he/she/it...?
We
can
can't / cannot
Can we...?
They
can
can't / cannot
Can they...?

Contractions

Full Form Contraction Usage
cannot
can't
Standard spoken/informal written
can not
n/a
Rarely used except for emphasis
can
n/a
No affirmative contraction exists

Meanings

Expresses that a person or thing has the power, skill, or opportunity to perform a specific action in the present.

1

Physical/Mental Ability

Having the inherent power or learned skill to do something.

“He can lift 100 kilograms.”

“She can solve complex math problems in her head.”

2

General Possibility

Expressing that something is possible or allowed by circumstances.

“You can buy stamps at the post office.”

“We can see the mountains from our window.”

3

Informal Permission

Asking for or giving permission in casual settings.

“Can I use your phone?”

“You can go home now if you're finished.”

4

Requests

Asking someone to do something for you.

“Can you help me with this bag?”

“Can you pass the salt, please?”

Reference Table

Reference table for Can: 表达能力 (Can)
主语 肯定句 (Affirmative) 否定句 (Negative) 疑问句 (Question) 简短回答
I
I can speak.
I can't / cannot speak.
Can I speak?
Yes, I can. / No, I can't.
You
You can sing.
You can't / cannot sing.
Can you sing?
Yes, you can. / No, you can't.
He/She/It
He can dance.
He can't / cannot dance.
Can he dance?
Yes, he can. / No, he can't.
We
We can play.
We can't / cannot play.
Can we play?
Yes, we can. / No, we can't.
They
They can run.
They can't / cannot run.
Can they run?
Yes, they can. / No, they can't.

正式程度

正式
I was wondering if you might be able to assist me?

I was wondering if you might be able to assist me? (Requesting assistance)

中性
Can you help me with this, please?

Can you help me with this, please? (Requesting assistance)

非正式
Can you give me a hand?

Can you give me a hand? (Requesting assistance)

俚语
Yo, can you help a brother out?

Yo, can you help a brother out? (Requesting assistance)

'Can' 的用法

CAN

能力

  • 技能 She can play guitar.
  • 容量 My phone can store 1TB.

许可

  • 请求 Can I leave?
  • 给予 You can go now.

可能性

  • 普遍情况 It can be cold in winter.
  • 特征 Stress can cause headaches.

请求

  • 随意 Can you help me?
  • 直接 Can you close the door?

'Can' vs. 常见错误

正确用法
I can swim. 正确：'Can' + 动词原形。
She can speak. 正确：第三人称不加 '-s'。
They can't hear. 正确：否定用 'Can't'。
常见错误
I can to swim. 错误：不要加 'to'。
She cans speak. 错误：'can' 不加 '-s'。
They don't can hear. 错误：不要用 'do not'。

'Can' 使用决策流

1

你想谈论某人的能力、技能或容量吗？

YES
用法：主语 + CAN + 动词原形 (例如 'I can play piano')
NO
看下一个问题。
2

你在请求或给予许可吗？

YES
用法：CAN + 主语 + 动词原形? (例如 'Can I go?'); 或 主语 + CAN + 动词原形 (例如 'You can go.')
NO
看下一个问题。
3

你在描述一般的可能性或特征吗？

YES
用法：主语 + CAN + 动词原形 (例如 'It can get cold.')
NO
看下一个问题。
4

你在做一个随意、直接的请求吗？

YES
用法：CAN + 主语 + 动词原形? (例如 'Can you help me?')
NO
考虑使用 'could' 或 'would'。

现代语境下的 'Can'

💬

在线聊天

  • • Can you send that meme?
  • • I can join the group call.
  • • Who can help with this doc?
📱

订餐/应用

  • • Can I add a note?
  • • You can track your order.
  • • Can you deliver by 7?
📚

学习/工作

  • • I can present next.
  • • Can we meet on Zoom?
  • • This tool can automate tasks.
📸

社交媒体

  • • She can really dance! #talent
  • • Can you believe this view?
  • • I can't even! 😂
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按水平分级的例句

1

I can swim.

2

Can you help me?

3

She can't cook.

4

They can speak English.

1

You can buy bread at the bakery.

2

Can I open the window?

3

He can play the guitar very well.

4

We can't come to the party tonight.

1

I can't find my keys anywhere.

2

Can you tell me how to get to the station?

3

You can see the whole city from the top of the tower.

4

If you finish early, you can go home.

1

It can be quite difficult to find a job these days.

2

I can't have left my phone at the restaurant.

3

Can you believe how much he has changed?

4

The software can handle multiple tasks simultaneously.

1

One can only imagine the impact of such a decision.

2

The results can be interpreted in several ways.

3

I can't help but feel that we've made a mistake.

4

Can it be that she was lying all along?

1

The sheer scale of the disaster can hardly be overstated.

2

As far as I can gather, the deal is still on.

3

He can be quite the charmer when he wants to be.

4

Such behavior can but lead to trouble.

容易混淆

Can: Expressing Ability (Can) 对比 Can vs. Could

Learners often use 'could' for present ability because they think it's just a more polite version of 'can'.

Can: Expressing Ability (Can) 对比 Can vs. May

Traditional grammar says 'may' is for permission and 'can' is for ability.

Can: Expressing Ability (Can) 对比 Can vs. Will

Learners try to combine them to talk about future ability.

常见错误

✗

I can to swim.

✓

I can swim.

Never use 'to' after modal verbs like 'can'.
✗

He cans play.

✓

He can play.

Modal verbs do not take an '-s' for he/she/it.
✗

I no can go.

✓

I can't go.

Use 'can't' or 'cannot' for negatives, not 'no'.
✗

Can you to help?

✓

Can you help?

Questions also follow the 'no-to' rule.
✗

I don't can dance.

✓

I can't dance.

Do not use 'do/does' with modal verbs.
✗

I will can come.

✓

I will be able to come.

'Can' has no future form with 'will'. Use 'be able to'.
✗

She can sings.

✓

She can sing.

The main verb after 'can' must be in the base form (no -s).
✗

I can't to find it.

✓

I can't find it.

Even in complex sentences, the 'no-to' rule applies.
✗

I haven't canned.

✓

I haven't been able to.

'Can' has no past participle. Use 'been able to'.
✗

Can you may help?

✓

Can you help? / May you help?

Do not use two modal verbs together.
✗

It can't have been true.

✓

It can't have been true.

This is actually correct, but learners often use 'mustn't' by mistake for negative deduction.

句型

I can ___ very well.

Can you ___ for me, please?

You can't ___ in this area.

It can be ___ to ___.

Real World Usage

Job Interviews very common

I can use Microsoft Excel at an advanced level.

Texting Friends constant

Can u come over later?

Ordering Food common

Can I have the burger without onions?

Travel/Tourism very common

Where can I buy a bus ticket?

Social Media common

I can't even! 😍

Doctor's Office occasional

I can't move my arm very well.

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💡

在生活场景中练习

试着问问自己：«我今天能做什么？» 比如在点餐时练习：
Can I have a latte, please?
⚠️

避开 to 的陷阱

这是最常见的错误！记住是 can + 动词原形，比如：
I can run fast
，而不是 can to run。
🎯

Can't 还是 cannot？

日常聊天或发短信多用 can't。只有在正式写作或想特别强调“不行”时才用 cannot：
I cannot accept this.
🌍

礼貌请求：Could vs Can

虽然 can 没问题，但在职场或面对陌生人时，用 could 会显得更有礼貌：
Could you help me with this?
💡

用 Can 表达可能性

Can 也可以描述一般情况下的可能性，比如：
Exercise can reduce stress.
这不仅仅是关于技能！

Smart Tips

Swap 'can' for 'be able to' to sound more professional.

I can meet you at 5. → I will be able to meet with you at 5:00 PM.

Use 'Could I have...' instead of 'I want...' or 'Can I have...'.

Can I have a coffee? → Could I have a coffee, please?

Remember: Modals are 'to-allergic'. If you see 'can', delete the 'to' immediately.

I can to play guitar. → I can play guitar.

Listen for the 't' in 'can't'. If you don't hear a 't' but the word is long, it's probably negative.

I can go. (short 'can') → I can't go. (long 'can')

发音

I /kən/ swim.

The Weak 'Can'

In affirmative sentences, 'can' is usually unstressed and sounds like /kən/ (rhymes with 'run').

Yes, I /kæn/.

The Strong 'Can'

In short answers or for emphasis, 'can' is stressed and sounds like /kæn/ (rhymes with 'pan').

I /kænt/ go.

The Stressed 'Can't'

The negative 'can't' is always stressed and has a long /æ/ or /ɑː/ sound depending on the dialect.

Rising Intonation

Can you help? ↗

Standard yes/no question

Falling Intonation

I can't do it. ↘

Definitive statement of inability

记住它

记忆技巧

CAN: C-apability, A-bility, N-ow. It's what you are capable of doing right now!

视觉联想

Imagine a 'Can' of soda with a superhero cape. The 'Can' has the power to do anything! When you see a can, think of your own superpowers (skills).

Rhyme

No 'to', no '-s', 'can' is the best for the ability test!

Story

Meet Sam. Sam is a 'Can-do' person. He can speak five languages, he can climb mountains, and he can even bake a cake. But today, he can't go outside because it's raining. He can stay home and read instead.

Word Web

AbilitySkillPossibilityPermissionRequestCannotCan't

挑战

Write down 5 things you can do and 5 things you can't do. Then, ask a friend if they can do those same things.

文化笔记

While 'may' is technically more correct for permission, using 'can' is standard. If a teacher says 'I don't know, CAN you?' when you ask 'Can I go to the bathroom?', they are making a joke about your physical ability vs. permission.

In professional emails, 'be able to' is often used to sound more polite and capable than the simple 'can'.

Australians often use 'can' in very casual, shortened requests, sometimes dropping the subject in very informal speech.

Derived from the Old English 'cunnan', which meant 'to know' or 'to know how to'.

对话开场白

“

What is one thing you can do that most people can't?

“

Can you speak any other languages besides English?

“

If you could have any superpower, what would it be and what could you do with it?

“

Can you tell me about a time you couldn't do something, but then you learned how?

日记主题

Write about your top three skills. What can you do well?
Describe a typical day in your city. What can tourists see and do?
Write a letter to your future self. What do you hope you can do in five years?
Discuss the limitations of technology. What can't computers do yet?

常见错误

Incorrect

正确

Incorrect

正确

Incorrect

正确

Incorrect

正确

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Test Yourself

选择正确的形式

My brother ___ play the guitar really well.

✓ Correct! ✗ Not quite. Correct answer: can
Can 是情态动词，在第三人称单数（如 'my brother'）后形式不变。
找出并修正错误

She can to speak three languages.

✓ Correct! ✗ Not quite. Correct answer: She can speak three languages.
情态动词 can 后面必须直接跟动词原形，不能带 'to'。
哪个句子是正确的？

Choose the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: They can't help us.
can 的否定形式是 can't 或 cannot，不需要助动词 do。
将单词排序

Arrange these words into a sentence:

✓ Correct! ✗ Not quite. Correct answer: Can you text me later
在 can 引导的疑问句中，结构是 Can + 主语 + 动词原形。

Score: /4

练习题

8 exercises
Choose the correct sentence. 多项选择

Which of these is correct?

✓ Correct! ✗ Not quite. Correct answer: She can sing.
Modal verbs like 'can' are followed by the base verb without 'to' and don't take an '-s'.
Fill in the blank with the correct form.

I ___ (not / can) come to the meeting tomorrow.

✓ Correct! ✗ Not quite. Correct answer: can't
The negative of 'can' is 'can't' or 'cannot'.
Correct the error in the sentence. Error Correction

Find and fix the mistake:

Can you to help me with my homework?

✓ Correct! ✗ Not quite. Correct answer: Can you help
Remove 'to' after 'can'.
Rewrite the sentence using 'can'. Sentence Transformation

I know how to play the violin.

✓ Correct! ✗ Not quite. Correct answer: I can play the violin.
'Can' is used to express learned skills.
Complete the dialogue. Dialogue Completion

A: Can you drive a car? B: No, ___.

✓ Correct! ✗ Not quite. Correct answer: I can't
Use the short negative form 'I can't' for short answers.
Is this 'Ability' or 'Permission'? Grammar Sorting

'Can I use your pen?'

✓ Correct! ✗ Not quite. Correct answer: Permission
Asking to use something is asking for permission.
Put the words in the correct order. Sentence Building

French / she / speak / can't / very / well

✓ Correct! ✗ Not quite. Correct answer: She can't speak French very well.
The order is Subject + can't + Verb + Object + Adverb.
Match the question to the answer. Match Pairs

1. Can you swim? 2. Can I go? 3. Can it rain?

✓ Correct! ✗ Not quite. Correct answer: 1-Yes I can, 2-Yes you can, 3-Yes it can
Short answers must match the subject of the question.

Score: /8

Practice Bank

13 exercises
选择正确的形式 填空

A: ___ I borrow your charger? B: Of course!

✓ Correct! ✗ Not quite. Correct answer: Can
选择正确的形式 填空

My cat ___ climb trees easily, but it ___ get down by itself.

✓ Correct! ✗ Not quite. Correct answer: can / can't
选择正确的形式 填空

If you work hard, you ___ achieve anything you set your mind to.

✓ Correct! ✗ Not quite. Correct answer: can
找出并修正错误 Error Correction

My old phone cannot to run that new game.

✓ Correct! ✗ Not quite. Correct answer: My old phone cannot run that new game.
找出并修正错误 Error Correction

When I was younger, I can lift heavy weights.

✓ Correct! ✗ Not quite. Correct answer: When I was younger, I could lift heavy weights.
哪个句子是正确的？ 多项选择

Choose the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: He can fix cars.
哪个句子是正确的？ 多项选择

Choose the correct sentence:

✓ Correct! ✗ Not quite. Correct answer: The train can be delayed due to snow.
输入正确的英语句子 翻译

将这句话翻译成英语：'你能帮我搬一下这个箱子吗？'

✓ Correct! ✗ Not quite. Correct answer: ["Can you help me with this box?","Could you help me with this box?"]
输入正确的英语句子 翻译

将这句话翻译成英语：'我找不到我的眼镜。'

✓ Correct! ✗ Not quite. Correct answer: ["I can't find my glasses.","I cannot find my glasses."]
将单词排序 Sentence Reorder

将单词排序：

✓ Correct! ✗ Not quite. Correct answer: I can't believe that story
将单词排序 Sentence Reorder

将单词排成疑问句：

✓ Correct! ✗ Not quite. Correct answer: Can we play a game after dinner
匹配主语和能力陈述 Match Pairs

将主语与正确的能力陈述匹配：

✓ Correct! ✗ Not quite. Correct answer: matched
匹配场景和句子 Match Pairs

将场景与最佳的 'can' 句子匹配：

✓ Correct! ✗ Not quite. Correct answer: matched

Score: /13

常见问题 (8)

'Can' is for the present (I can swim now), while 'could' is for the past (I could swim when I was six). 'Could' is also more polite for requests.

'Can't' is much more common in speaking and informal writing. 'Cannot' is used in formal documents or for strong emphasis.

In English, you cannot put two modal verbs together. To talk about the future, use 'I will be able to'.

No, 'can' is a modal verb, and modals never change their form. It is always 'can'.

Yes, it is very common. 'Can I go?' is perfectly fine, though 'May I go?' is more formal.

'Know how to' is only for learned skills. 'Can' is for skills AND physical ability or opportunity.

In a sentence, 'can' is often short (/kən/). 'Can't' is always long and stressed (/kænt/).

Yes, we use it for general possibilities, like 'It can get very hot in July'.

Scaffolded Practice

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Mastery Progress

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In Other Languages

Spanish high

Poder

Spanish conjugates 'poder' (puedo, puedes), while English 'can' never changes.

French high

Pouvoir

French requires different forms for 'I can' (je peux) and 'we can' (nous pouvons).

German very_high

Können

German conjugates the modal (ich kann, wir können).

Japanese moderate

～（ら）れる / ことができる

English uses a separate word ('can') before the verb, while Japanese modifies the verb itself.

Arabic moderate

يستطيع (yastati'u)

Arabic requires the second verb to be conjugated to match the subject.

Chinese moderate

会 (huì) / 能 (néng)

English uses 'can' for both learned skills and physical ability.

Learning Path

Prerequisites

Previous
英语情态动词：can, should, must
Next
Could：谈论你过去的技能

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B1 Builds On

Could：谈论你过去的技能

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B1 Builds On

Could: 礼貌请求

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第一条件句与 'Can' (未来可能性与许可)

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逻辑不可能性 (不可能是!)

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