情态动词+ have done复习 -自创

1、情态动词情态动词+have done+have done情态动词情态动词+have done must have done “当时一定当时一定/一定已经一定已经” may/might have done “当时当时可能可能/可能已经可能已经 ” could have done 同上同上 cant/couldnt have done “当时不可能当时不可能/不可能已经不可能已经 ” may not have done “当时也许不当时也许不” might not have done can/could have done 陈述陈述肯定肯定句句陈述陈述否定否定句句疑问句疑问句对过去情况的推测对过去

2、情况的推测1. I didnt hear the phone. I_asleep. A. must be B. must have been C. should be D. should have been2.Do you know where David is? I couldnt find him anywhere. Well,he _ have gone far his coats still here.A.shouldnt B.mustnt C.cant D.wouldnt3.Sorry Im late. I_have turned off the alarm clock and go

3、ne back to sleep againA. might B. should C. can D will3）虚拟语气（与过去事实相反的主句）虚拟语气（与过去事实相反的主句）“本本”might have done could have donewould have donecouldnt have done might not have doneshould (not) have done ought to (not) have done 观察：哪观察：哪些情态动些情态动词没有这词没有这种用法？种用法？1) My sister met him at the Grand Theater yes

4、terday afternoon, so he _ your lecture (上海 2000) A couldnt have attended B neednt have attended C mustnt have attended D shouldnt have attended 该题前句叙说一个客观事实，后句对前句进行补充说明，分析选项可知C是错误的 而B、D两项不符合题意。故本题选A。 解析解析2)Jack yet, otherwise he would have telephoned me (上海06)A mustnt have arrived B shouldnt have ar

5、rived C cant have arrived D need not have arrived解析解析cant have arrived 表示强烈的否定的猜测。语气较弱时用couldnt have done or might not have done or may not have done .need not have done：表示过去本来没有必要做某事，但事实上却做了。3) I was really anxious about you You _ home without a wordA mustnt leave B shouldnt have left C couldnt have left D neednt leave分析该题前后句之间的关系和语气可知，事实上是 “本不应该离家出走却走了”，故本题选B。解析解析4) I told Sally how to get here, but perhaps I for her (NMET04)A had to write it out B must have written it outC