现在完成时过去完成时，各2句肯定句2句否定句2句疑问句
- 提问者网友：难遇难求
- 2021-05-15 01:07
- 五星知识达人网友：慢性怪人
- 2021-05-15 01:50
I have finished my homework.
I haven't finished my homework.
Have you finished your homework?
We have cleaned the classroom.
We haven't cleaned the classroom.
Have you cleaned the classroom?
The train had left before we got to the station.
The train hadn't left before we got to the station.
Had the train left before you got to the station?
It had rained when I got home.
It hadn't rained when I got home.
Had it rained when you got home?
- 1楼网友：第四晚心情
- 2021-05-15 03:08
1、现在完成时强调目前的结果和状态：
eg. I have seen the film, but I haven't read the book yet. Have you read it?
He has been to Beijing twice, but he hasn't been abroad yet. Has he told you his experience?
2. 过去完成时表示两个发生在过去的行为，先发生的行为用过去完成时，后发生的行为用一般过去时：
eg. I went to school after I had had my breakfast this morning.
When he arrived here yesterday afternoon, we had finished our work.
He hadn't finished his homework when his mom came back.
Had Tim washed his clothes when you telephoned him last night? No, he hadn't.