情态动词+have-done.pptVIP

情态动词 + have done 一、情态动词＋have done 有两种含义： I. 推测。表示对过去已发生的事情进行 推测。 II.责备。对过去已发生的事情进行责备 和抱怨。 Grammar I.推测 表示对过去已发生的事情进行推测。 1. 在肯定句中用 must, could, may 或 might。 ( must 的把握性最大，意为“肯定”； could, may, might 语气较弱，意为“可能”。) He could/may/might have gone to school. 他可能上学去了。 He must have gone to school. 他肯定是上学去了。 1) I didn’t hear the phone. I ____ asleep. A. must be B. must have been C. should be D. should have been √ 2) Sorry, I am late. I ____ have turned off the alarm clock and gone back to sleep again. A. might B. should C. can D.will √ 3) ---Did Jim come? ---I don’t know. He ___ while I was out. A. must have come B. has come C. might have come D. should have come √ Test yourself 4) --- Well done, Jack! --- Thanks. But given more time, I ___ it better. A. shouldn’t have done B. could have done C. might not do D. could do √ 2. 在否定句中用 can’t /couldn’t 或 may not /might not, 不用 mustn’t。 ( can’t (couldn’t) 把握性较大， 意为“不可能”， “肯定没有”; may not (might not) 把握性较小， 意为“可能不”，“也许没有”。) He may/might not have gone to school. 他也许没去上学。 He cant/couldnt have gone to school. 他肯定没去上学。 1) ---There were already five people in the car but they managed to take me as well. --- It ___ a comfortable journey. A. can’t B. shouldn’t be C. mustn’t have been D. couldn’t have been √ Test yourself 3. 在疑问句中只能用 can (could)。 1) The head teacher isn’t here. Where can he have gone? 班主任不在这里，他会上哪里去呢？ 2) She is two hours late. What ___ to her? A. may happen B. is happening C. can have happened D. must have happened √ II.责备。对过去已发生的事情进行责备 和抱怨。 1. could have done 只用于肯定句中， 表示“本来能做某事但没有做”。 1) --- I stayed at a hotel while in New York. --- Oh, did you？You __ with Barbara. A. could have stayed B. could sta