1
cannot + 动词原形
表示能力或可能性上的否定。
I cannot attend the meeting tomorrow.
我明天无法参加会议。
不能；无法
先理解核心含义，再看它在真实句子里的用法。
不能；无法
be unable to; not be able to (due to physical, mental, or logical impossibility)
I cannot attend the meeting tomorrow.
我明天无法参加会议。
不能；无法(无论是身体上的不能、逻辑上的不可能等)。
Can not; be unable to (whether due to physical inability, logical impossibility, etc.).
被禁止；不允许。
Be forbidden or not permitted to.
cannot
Base
原形
cannot
3rd person
第三人称单数
cannot
-ing
现在分词
could not
Past
过去式
could not
Past participle
过去分词
She cannot swim.
她不能游泳。
He could not attend the meeting.
他不能参加会议。
They have not been able to solve the problem.
他们无法解决这个问题。
不能用于进行时态
I cannot attend the meeting tomorrow because I have a doctor's appointment.
我明天无法参加会议，因为我有医生预约。
She cannot solve this math problem without help.
没有帮助，她无法解决这道数学题。
They cannot park here; it's a no-parking zone.
他们不能在这里停车，这是禁停区。
表示能力或可能性上的否定。
I cannot attend the meeting tomorrow.
我明天无法参加会议。
较正式，表示没有选择，只能做某事。
We cannot but admire his courage.
我们不得不钦佩他的勇气。
表示不由自主地做某事。
She cannot help laughing when she sees the clown.
她看到小丑时忍不住笑了。
Not this
I can not swim.
Use this
I cannot swim.
在标准英语中，'cannot' 通常写作一个词，表示'无法'。写成两个词 'can not' 可能被视为非标准，除非在强调否定时，如 'can not only'。应使用一个词 'cannot'。
Not this
I cannot to swim.
Use this
I cannot swim.
在英语中，情态动词 'cannot' 后直接跟动词原形，不带 'to'。中文中的'不能去做'应译为 'cannot do'，而不是 'cannot to do'。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use cannot naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY.