don't,didn't,does't在否定句中什么时候用

Question

don't,didn't,does't在否定句中什么时候用

Answer 1

1.don't 是在主语是第一人称单复数I ,we,第二人称单复数you,和第三人称复数一般现在时使用they.
例如：I /we don't like orange.
You don't smoke ,do you?
They don't want to go there.
2.did't 是所有人称在过去式时使用.
I didn‘ go to school.
She didn't like me.
They didn't pass the exam.
3.doesn't 是在第三人称单数she he it一般现在 时使用.
She/He doesn't have lunch.
It doesn't belong to me.