情态动词完成时的推测(课堂PPT).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,*,*,1,Why is the road,so wet?,It,must have rained,last night.,2,A:Where are the girls?,Can,they,have gone,home?,B:No,they,cant have gone,home.,Its so early.,3,-Look,the lights are off in their room.,-Where have they gone?,-They,might have gone,to the cinema.,4,A:Here is a doll for your daughter.,B:Thank you so much.Its beautiful.But you,neednt have bought,it.She has so many at home.,5,Finding the rule,Believing what happened in the past is the case(used only in positive sentences),6,indicating that something was a possibility in the past,though it did not actually happen(negative or interrogative sentences),7,Suggesting that it is possible that something happened or was true(used only in positive/negative sentences),8,indicating that something did not/did happen,but the speaker wishes it had(not)happened.,9,indicating that it is not necessary for sb.to do sth,though he/she did it.,10,must have done,对过去的非常肯定的,推测,（语气最强）,11,对已发生的过去情况的推测，若陈述句谓语部分有“must have done”，而且,有表示过去的时间状语,问句部分用,didnt,；,1)They,must have gone,there last night,didnt they?,12,2)They must have arrived by now,havent they?,对已发生的过去情况的推测，若陈述句谓语部分有“must have done”，若没有表示过去的时间状语，问句部分用havent 或hasnt.,13,3)He,must have been,to the Great Wall,hasnt he?,对已发生的过去情况的推测，若陈述句谓语部分有“must have done”，若,没有表示过去的时间状语,，问句部分用,havent 或hasnt,.,14,这个房间昨天肯定被清扫了。,The room _ _ _ _ yesterday.,must have been cleaned,15,他一定已经背了5000单词了。,He _ _ _ 5,000 words.,must have learnt,16,You must have seen the film“Journey,to the West”,_ _?,havent you,17,They must have been to the World Expo last week,_ _?,didnt they,18,can have done,对过去的疑问推测,cant have done,对过去的否定推测,疑问句,和,否定句,19,-Where is John?Can he have gone to,the playground?,-No,he cant have gone to the playground It is raining.,20,-_Mr King _the letter?,金先生已经收到那封信了吗？,-No,he _it.,不，他不可能收到。,Can,have received,cant have received,21,may/might have done,某事有可能发生过,(表示对过去的不太肯定的推测，,语气比must have done 弱),用于肯定句,和否定句,(may的语气,比might稍强),22,-Where did Adam get that new football?He hasnt got any money.,-It _ a present.After all,it was his birthday last week.,A.might have been B.might be,23,He _out because the light was on.,A.may not have gone B.may have not gone,C.may not go D.must not have gone,24,neednt have done,本没有必要做某事,（但此事已做）,25,We _the plant because it rained last night.(本无必要),neednt have watered,26,shouldnt have done,本不该做某事,（但此事已做）,表示责备,27,He,should have repaired,the bike yesterday.,should have done,本应该做某事,（但此事未做）,表示责备,28,Oh,Imnotfeelingwellinthestomach.I,shouldnt have eaten,so much fried chicken just now.,29,你本应该先完成你的作业。,You _ _ _ your homework first.,should have finished,30,你本不应该跟我撒谎。,You _ _ _to me.,shouldnt have lied,31,高考例析,1.Sorry Im late.I _ have turned off the alarm clock and gone back to sleep again.（2000 北京春季）A.might B.should C.can D.will,答案为 A。表推测的用法。句意：对不起,我迟到了。我(当时)兴许是关了闹钟又回去睡觉了。might 相当于 may,但语气更加不肯定。,32,2.I was really anxious about you.You_ home without a word.(01 全国)A.mustnt leaveB.shouldnt have left,C.couldnt have left D.neednt leave,答案为 B。虚拟语气用法。句意：我（那时）真地很担心你。你本不应该不留个话就离开家。,33,3.Ill tell Mary about her new job tomorrow.You_ her last week.（04 福建）A.ought to tell B.would have told,C.must tell D.should have told,答案为 D。虚拟语气用法。句意：-我明天要告诉她我的新工作的情况。-你本应该上周告诉她。,34,4.Tom graduated from college at a very young age.Oh,he _ have been a very smart boy then.（04 全国IV）A.could B.should C.might D.must,答案为 D。表推测的用法。句意：汤姆很年轻的时候就大学毕业了。哦，他肯定是一个很聪明的男孩儿。,35,5.He _ have completed his work;otherwise,he wouldnt be enjoying himself by the seaside.(05 北京卷)A.should B.must,C.wouldnt D.cant,答案为 B。用法同4题。句意：他肯定做完了工作，不然他就不会在海边痛快地玩儿了。,36,6.Do you know where David is?I couldnt find him anywhere.Well.He _ have gone farhis coats still here.（05湖北卷）Ashouldnt Bmustnt,Ccant Dwouldnt,答案为 C。表推测的用法。句意：你知道大卫在哪儿吗？我哪儿也找不到他。瞧，他不可能走远他的上衣还在这儿呢。cant 相当与 couldnt，但后者语气更加委婉。,37,练习,The woman biologist stayed in Africa studying wild animals for 13 years before she returned.Oh,dear!She _ a lot of difficulties!(05 江苏卷)A.may go through B.might go throughC.ought to have gone through D.must have gone through,38,2.I have lost one of my gloves.I _ it somewhere.（05 北京春季）A.must drop B.must have dropped C.must be dropping D.must have been dropped,39,3.Mr.White _ at 8:30 for the meeting,but he didnt show up.（04 广西）A.should have arrived B.should arriveC.should have had arrived D.should be arriving4.He paid for a seat,when he _ have entered free.（05 山东卷）A.could B.would C.must D.need,40,5.Tom is never late for work.Why is he absent today?Something _ to him.(05 江西卷)A.must happen B.should have happened C.could have happened D.must have happened6.I _ have been more than six years old when the accident happened.(05 天津卷)A.shouldnt B.couldnt C.mustnt D.neednt,41,