In English grammar the modal verb “can” and its opposite “cannot or can’t” is explained as a verb that we use to describe ability or the lack of it. For example, I can play tennis or I cannot swim.
在英语语法中，情态动词"can"和它的否定形式"can't"分别用来描述拥有某种能力和缺乏某种能力，比如"I can play tennis."（我会打网球。）或者" I cannot swim."（我不会游泳。）

In question form it can be used to ask permission, for example, “Can I leave early today?” or as a challenge – “Why can’t I have another biscuit?”
在疑问句中，"can"和"can't"用于征得同意，比如“Can I leave early today?”（“我今天可以提前走吗？”）或者可用于表达挑衅意味，如“Why can’t I have another biscuit?”（“我为什么不能再吃一块饼干？”）

Can’t (or cannot) is also used with some verbs to create idiomatic expressions and are widely used by native English speakers.
"can't"（或"can not"）也常常和一些动词连用，在英语中是常用的习惯表达。

沪江小编：下面小编就为大家列出情态动词can't 的10个习惯表达

1. can’t wait –to be excited about something
1.迫不及待要做某事

e.g. I can’t wait to see my friends next week. It’s going to be wonderful.
例：下周要见我的朋友们啦，我已经迫不及待了，一定会很棒的。

2. can’t stand – to strongly dislike something
2. 厌恶某物

e.g. I can’t stand the traffic in London.
例：我简直不能忍受伦敦的交通。

3. can’t bear – to strongly dislike something because it makes you unhappy
3. 因为某件东西令你难以忍受而讨厌

e.g. She can’t bear to be away from her family longer than a week.
例：她不能忍受离开家人超过一个星期

4. can’t take it – cannot tolerate something
4. 不能忍受某事

e.g. I can’t take his constant shouting anymore. I have to leave.
例：我受不了他一直大叫了，我要走了。

5. can’t be bothered – to have no interest in something
5. 对某事没兴趣

e.g. I know I should go for a run but I can’t be bothered tonight.
例：我知道我该去跑步了，但是今天晚上我就是提不起兴趣。

6. can’t take my eyes off her/him – to be attracted to someone
6. 被某人吸引

e.g. Simon can’t seem to take his eyes off the new Marketing assistant.
例：西蒙被新来的市场助理深深吸引了。

7. can’t win – life is difficult
7. 生活艰辛

e.g. Sometimes no matter what you do in life, you can’t win.
例：有时候无论你做什么，生活都是一样的艰辛。

8. can’t help it – to have no control over something
8. 忍不住做某事

e.g. I can’t help it, I find chocolate digestives irresistible!
例：我就是忍不住，巧克力太难拒绝了！

9. can’t think straight – cannot concentrate
9. 不能集中

e.g. I am so tired that I can’t think straight.
例：我太累了，注意力无法集中。

10. can’t hear myself think – cannot concentrate
10. 不能集中

e.g. There is so much noise here that I can’t hear myself think.
例：这里太吵了，我不能集中思考了。