否定句的底层原理
助动词+not
I （do）like you.
我喜欢你。
否定：I do not like you. 我不喜欢你
Do you like me?
Yes ,I do like you.(可以省略)
No ,I don’t like you.
能省而不省==强调
I don’t like you.

Do==don’t
Does==doesn’t
Did==didn’t

He is a teacher.
他是一个老师。
否定：He is not a teacher. 他不是一个老师
He isn’t a teacher.

Is= isn’t
Am==am not
Are==aren’t
Was==wasn’t
Were==weren’t

Marry will go to school.
Marry将要去上学。
否定：Marry will not go to school. Marry不会去上学。
Marry won’t go to school.

Will==won’t
Would==wouldn’t

May==may not
Might==might not

Can==cannot, can’t
Could==couldn’t

Should= shouldn’t
Shall==shall not

Must==mustn’t

He has finished his homework.
他已经做完作业了。
否定：He has not finished his homework. 他还没写完作业。
缩合：助动词+n’t
He hasn’t finished his homework.

Have==haven’t
Has==hasn’t
Had==hadn’t

他没有打你。
He hits you=>he doesn’t hit you.

我不能做这份工作。
I can’t do this job.

小明还没回答这个问题。
Xiaoming hasn’t answered the question.
他没在看电视。（用过去式）
He wasn’t watching TV.
他没在看电视吗？
Wasn’t he watching TV?
带否定的疑问句：助动词一定要用“缩合形式”