|过去||I did||I was doing||I had done||I had been doing|
|现在||I do||I am doing||I have done||I have been doing|
|将来||I shall do||I shall be doing||I shall have done||I shall have been doing（/）|
|过去将来||I should do||I should be doing（/）||I should ha ve done（/）||I should have been doing（/）|
I thought the experiment was going on now.
She said this apparatus would be available next week.
Am/is/are/+ done. This room is cleaned every day.
Was/were +done This room was cleaned yesterday.
Will be+ done This room will be cleaned.
Am/is/are being done This room is being cleaned at the moment.
Was/were being done This room was being cleaned when I arrived.
Have/has been done My car has been repaired.
Had been done The room looks much better. It had been cleaned.
No sooner had I arrived at the theatre than the film began .
Some people think that the relations between people have deteriorated -（ deteriorate） so much that understanding and friendship are almost impossible.
Nearly a week passed before the girl was able to explain what had happened （happen） to her.
做主语 To see is to believe.
What to do next has not been decide
It is not easy to remember all these words.
表语 To know everything is to know nothing.
定语 This is a book to be written .
宾语 I want to study .
He found it impossible to keep silent any longer.
宾补 They warned me not to be late.
I let you do it
（make， have， see， watch， notice， look at， observe， smell， listen to， hear，perceive）
状语 Yesterday he came to see me.
独立成份 To be frank ， she is not my girlfriend.
形容词补语 I am glad to hear the news.
不定式的逻辑主语 For a bridge to collapse like that is unbelievable.
不定式的 时态和语态 to do（be） ， to be+p.p.
to have done， to have been done
主，表语 Seeing is believing
Tom’s going there won’t do any harm.
My hobby is collecting stamps.