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1、情态动词+ have done,1)must have done 对过去已经发生的事的肯定推测. (只用于肯定句),He must have gone to bed, for the light was out.,Where is my pen? I must have lost it.,2)can/could have done 对过去行为的怀疑和不肯定的推测. (常用于否定句和疑问句) 在否定句意为“不可能, 不会是”,Mick cant/couldnt have found his car, for he came to work by bus this morning.(不可能/不会找
2、到车),Can she have heard from you? 她可能收到你的信吗?,注意: could+ have done 具有两层意思 表示对过去发生的事的揣测, 可与can互换. 表示对过去能做的事而没有做, 不可与can替换. 意为:“本来可以做/能做”,-I stayed at a hotel while in New York. -Oh. Did you? You could have stayed with Barbara.,有时含有责备或遗憾的意思.,You could have done it better. You could have come earlier.,你本
3、可以把这件事做得更好.,你本可以来的更早.,3)may/might have done 表示推测, 可能性更小, 主要用于肯定句. 译为: “或许”,He may/might have gone to the library.他或许已经去图书馆了.,might +have done 有时含有委婉的 责备或庆幸等感情. 这时不能用may,You might have told me earlier. 你本可以早点把消息告诉我的.,4)should have done 表示本应该做 但却未做, 含有“后悔,遗憾,责备, 批评”之意.,You should have been more carefu
4、l. 你本应该更细心些.,You shouldnt have told him about it. 你本不该告诉他这事.,5)neednt have done 表示“本来用不着, 本不必” 之意.,You neednt have asked him. (But you asked him.),You neednt have come. I have finished the work.,情态动词巩固练习,1.-I stayed at a hotel while in New York. -Oh, did you? You_with Barbara. A.could have stayed B.
5、could stay C.would stay D.must have stayed,A,2.I didnt see her in the meeting room this morning. She_ at the meeting A.mustnt have spoken B.shouldnt have spoken C.neednt have spoken D.couldnt have spoken,D,3.He_you more help, even though he was busy. A.might have given B.must have given C.can have g
6、iven D.may give,A,4.-I saw our teacher in the office just now. -You_her, she is still abroad. A.cant have seen B.mustnt have seen C.neednt have seen D.shouldnt have seen,A,5.Kate is already two hours late. What_to her? A.can have happened B.may have happened C.should have happened D.must have happen
7、ed,A,6.We_last night, but we went to the concert instead. A.must have studied B.might study C.should have studied D.would study,C,7.There was plenty of time. She_. A.mustnt have hurried B.couldnt have hurried C.mustnt hurry D.neednt have hurried,D,8.Sorry, Im late. I_have turned off the alarm clock
8、and gone back to sleep again. A.might B.should C.can D.will,A,9.Yesterday, Jan walked away from the discussion.Otherwise, she_something she would regret late. A.has said B.said C.might say D.might have said,D,10.-Did you scold him for his mistake? -Yes, but _it. A.Id rather not do B.Id better not do
9、 C.Id better not have done D.Id rather have not done,C,11.I didnt hear the phone. I_asleep. A.must be B.must have been C.should be D.should have been,B,12.Janny_have kept her word. I wonder why she changed her mind. A.must B.should C.need D.would,B,13.Tom ought not to_me your secret, but he meant no
10、 harm. A.have told B.tell C.be telling D.having told,A,14.-Could I borrow your dictionary? -Yes, of course you _. A.might B.will C.can D.should,C,15.-Shall w go skating or stay at home? -Which_do yourself. A.do you rather B.would you rather C.will you rather D.should you rather,B,16.I told Sally how
11、 to get here, but perhaps I_for her. A.had to write it out B.ought to write it out C.must have written it out D.should have written it out,D,17.The fire spread through the hotel very quickly but everyone_get out. A.had to B.would C.could D.was able to,D,18.When he was there, he_go to that coffee sho
12、p at the corner after work every day. A.would B.should C.had better D.might,A,19.It is strange that he_such a silly thing. A.must have done B.may have done C.could have done D.should have done,D,20.-_he turn up the radio? -Yes, please. A.Will B.Would C.Does D.Shall,D,21.-Jack fell off a ladder yeste
13、rday, but he is all right. -Hes lucky. He_himself badly. A.could wound B.would have wounded C.could hurt D.would wound,B,22.-Could I use your dictionary? - _. A.Please not B.Yes, you do C.No, you might not D.Please do as yours,D,23.-_the young man there be her cousin? -He_be, but Im not sure. A.Can; may B.May; wont C.Can; must D.will; dont,A,5)neednt have done 表示“本来用不着, 本不必” 之意.,You neednt have asked him. (But you asked him.),You neednt have come. I have finished the work.,
