高中英语 情态动词have_done课件 北师大版选修7 课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,情态动词,have done,can/could/may/might have done,(1),都表示对过去所发生的事情的推测。意为“也许可能已经”。,肯定句,:may/might/could have done (can have done),否定句,:cant/couldnt/may not/might not have done,疑问句,:Can/Could/Might have done?(Mayhave done?),Shes two hours latewhat,can/could have happened,?Can/Could he have missed her train?,Yes,she,may/might have,.She,may/might/could have overslept and got,up too late.,Might,I,have lost,it somewhere?,Compare:,He,cant/couldnt/may not/might not have gone,out because the lights on.,(,现在对过去的推测,),I thought he,couldnt/might not have gone,out because the light was on.,(,过去对过去之前的推测,),I thought it,might rain,.(It,may,rain.),I asked if it,could rain.,(,Can,it rain?),(,过去对过去将来的推测,),My wifes in hospital our baby,could/may/might arrive,at any time.,(,现在对将来的推测,),What do you think that noise,was,?,It,may/might/could have been,a cat.,(,现在对过去的推测,),What do you think that noise,is,?,It,may/might/could be,a cat.(can),(,现在对现在的推测,),(2)could/might have done,还表示过去本能够本可以做某事是而实际没有做，有时含有“责备”之意。,In my view,the accident,could/might have been prevented,.,You,could/might have told,me about it earlier.,(3)could/might have done,还表示过去本会发生某事而幸好没有发生。,You were stupid to try climbing up there.You,could/might have killed,yourself.,You shouldnt have run across the road without looking round.You,might/could have been knocked down,by a car.,(4)could/might have done,还用于虚拟语气中,。表示“,过去本会做某事”而没有做,。,If he,had not been,busy then,he,could/might(,也可用,would)have helped,me.,=He,could/might/would have helped,me,but he,was,busy then.,=He was busy then.Otherwise/Or/Or else he,could/might/would have helped,me.,He,could/might/would have helped,me,even if he was busy.,I,could/might/would not have finished,it in time without your help.,2.must have done,表示对过去所发生的事情的肯定推测,意为“肯定一定做了或发生了某事”,。,只用于肯定句中。,Someone,must have opened,the cage the lion couldnt have escaped on its own.,I didnt hear the phone.I,must have been,asleep.,Compare:,Was,that the manager who walked by?,It,must have been,./No,it,cant have been,.,Is,that the postman who is knocking at the door?,It,must be,./It,cant be,.,3.should/ought to have done,表示过去本应该做某事而实际上没有做，含有“责备”之意。,The plants dead.Maybe I,should have given,it more water.,I know I,ought not to have taken,the money.,Compare:,Compare:,We didnt exercise much,but we really,ought to have/should have,.,We dont exercise much,but we really,ought to/should,.,(2),表示对过去所发生的事情的推测,意为“应该会”，“理应会”。,Its eight oclock.He,should have arrived,here(,should be,here)by now.,That was disappointing we,should have won,that game easily.,(3),有时表示对将来要发生的事情的推测。,I,should have finished,reading it by Friday.,4.neednt have done,表示,过去,本不需要做某事而实际上做了。,There was plenty of time.I,neednt have hurried,.(But I hurried.),Compare:,There was plenty of time,so I,didnt need to hurry,.(So I didnt hurry.),Compare:,Theres plenty of time,so I,neednt hurry,.(now),(,作表语,),With so many problems _(solve),the manager couldnt sleep well.,With so many problems _,(solve),the manager could sleep well now.,With prices _(go)up so fast,we cant afford luxuries.,She knew that with him _(help)him,she could and would succeed.,to solve,solved,going up,to help/helping,_(,由于经理生病不在,),the meeting had to be put off.,_(,由于生产增长了,),the company has had another excellent year.,(3),伴随方式,With the manager,away ill,With production,up by 60%,12.Daisy turned round and saw she was being watched by,an,excited,elephant,.,excite,vt,.,使某人兴奋激动,excited,adj.,感到激动的（人）,exciting,adj.,令人激动的（事）,Ive got some very _ news for you.,The _ children were opening their Christmas presents.,exciting,excited,定语,定语,13.and they,set,the number of animals,to be hunted,.,(1),set,vt,.,确定,(,时间,价格,数量等,),Have,you,set,a date/time for your wedding yet?,The price,was set,at$1000.,(2),to be hunted,将被猎杀的,(=that were to be hunted,(,不定式被动语态作定语，表被动和将来,),