2017年高考英語語法講解及練習(xí)：情態(tài)動詞+動詞完成式

　　2017年高考已經(jīng)進(jìn)入一輪復(fù)習(xí)階段，高考英語語法是高考英語診斷中重點(diǎn)考察知識點(diǎn)，為了幫助大家更好地進(jìn)行高考英語語法的學(xué)習(xí)，小編為大家整理了2017年高考英語語法講解及訓(xùn)練，供大家參考，以下是2017年高考英語語法講解及訓(xùn)練：情態(tài)動詞+動詞完成式。

　　2017年高考英語語法講解及訓(xùn)練：情態(tài)動詞+動詞完成式

　　“情態(tài)動詞+動詞完成式”

　　1. must/ may / might + have done，對已發(fā)生行為的推測。

　　2.“ should + have done” “ ought to + have done”表示本來該做某事卻未做，否定式“shouldn’t + have done” “ oughtn’t to + have done”本來不該做而做了的事。

　　3.“ needn’t + have done”做了本來不必做的事，“本來不必”。

　　2) He looks happy. He _________ (not know) this bad news.

　　3) Where is my pen ? I _______________ (lose) it.

　　4) He was late for work. He____________ ( not catch) the first bus.

　　5) I didn’t see her in the meeting room. She_____________(not speak) at the meeting.

　　6) She is two hours late. What__________________(happen) to her?

　　7) The plant is dead . I ____________(water) it from time to time.

　　8) Tom_____________ (not give away) the secret, but he meant no harm .

　　9) It was a five-minute walk from our school. You _________ (not come) by taxi.

　　(Keys: 2.can’t have known 3.may\might have lost 4. might not have caught

　　5. can’t /couldn’t have spoken 6. could\can have happened 7.should have watered 8. shouln’t have given away 9.needn’t have come)

　　▲ 注意: could/might+have done:表示過去有可能發(fā)生，但實(shí)際沒有發(fā)生.

　　1) You were crazy to climb up that tree. You could have killed yourself.

　　2) You might have made more progress, but you didn’t work hard.