重点语法——动词的时态和语态

　　时态的呼应

　　I thought the experiment was going on now.

　　She said this apparatus¹ 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 .

　　Hardly……… when

　　Some people think that the relations between people have deteriorated³ -（ deteriorate²） 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.

　　非谓语动词

　　动词不定式

　　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 frank⁴ ， 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 collapse⁵ 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

　　动名词

　　主 ， 表语 Seeing is believing

　　Tom's going there won't do any harm.

　　My hobby is collecting stamps.