1、1.“may(might)+have+过去分词”表示_1).Youmightbothhavebeencaughtandkilled._2).Hemighthavenotsettledtheproblem._注意：这一句型用may和might含义基本相同，常可换用，只是might所表示的可能性比may更加微弱，语气更加委婉。2.“must+have+过去分词”表示_只用于_中。如：1).Thestudentsareplayingontheplaygroundnow.Theymusthavefinishedtheirhomework._3.“can/could+have+过去分词表示_用于_如：1
2、).Thereisnolightintheroom.Canhehavegoneout?_2).Theycanthavefinishedtheworkthatsoon._4.“should+have+过去分词”表示_，其否定形式_，意思是_。如：1).Youshouldhavehandedinyourcompositionlastweek._2).Youshouldnthavegonetoseefilmlastnight._注意：(1).“should+have+过去分词”_，Tomhasdonetheworkfortwodays,soheshouldhavefinisheditalready.
3、(2).该结构还可表示_Thereisnoreasonwhysheshouldhaverefused._Itissurprisingthatheshouldhavebeensostupid._5.could+have+done表示“_，是一种责备的语气。-IpaidavisittoNewYorklastmonthandIstayedatanicehotel.-Oh,youcouldhavestayedwithTom.6.“need+have+过去分词”表示过去“_”否定形式_,表示_。如：1).Youneednthavetoldhimaboutit._7.would+have+done为虚拟语
4、气,表示_”，其否定形式为_,表示_Step1情态动词have+过去分词用法小结1.“may(might)+have+过去分词”表示_1).Youmightbothhavebeencaughtandkilled._2).Hemighthavenotsettledtheproblem._注意：这一句型用may和might含义基本相同，常可换用，只是might所表示的可能性比may更加微弱，语气更加委婉。2.“must+have+过去分词”表示_只用于_中。如：1).Thestudentsareplayingontheplaygroundnow.Theymusthavefinishedtheirh
5、omework._3.“can/could+have+过去分词表示_用于_如：1).Thereisnolightintheroom.Canhehavegoneout?_2).Theycanthavefinishedtheworkthatsoon._4.“should+have+过去分词”表示_，其否定形式_，意思是_。如：1).Youshouldhavehandedinyourcompositionlastweek._2).Youshouldnthavegonetoseefilmlastnight._注意：(1).“should+have+过去分词”_，Tomhasdonetheworkfor
6、twodays,soheshouldhavefinisheditalready.(2).该结构还可表示_Thereisnoreasonwhysheshouldhaverefused._Itissurprisingthatheshouldhavebeensostupid._5.could+have+done表示“_，是一种责备的语气。-IpaidavisittoNewYorklastmonthandIstayedatanicehotel.-Oh,youcouldhavestayedwithTom.6.“need+have+过去分词”表示过去“_”否定形式_,表示_。如：1).Youneednth
7、avetoldhimaboutit._7.would+have+done为虚拟语气,表示_”，其否定形式为_,表示_Exercise:1.-Itwasaredlight,William.You_thecar.-Sorry,Ididntseeit.A.muststopB.musthavestoppedC.shouldstopD.shouldhavestopped2.-HowcouldIthankyouenough?-Dontmentionit.Anyotherman_that.A.mustdoB.coulddoC.wouldhavedoneD.shouldhavedone3.Walkingalo
8、neinthedesertedvillage,Johnwasscared.Hethoughthe_Tomtogowithhim.A.mighthaveaskedB.shouldaskC.musthaveaskD.shouldhaveask4.She_thefilm,forsheknowsnothingaboutit.A.cantseeB.canthaveseenC.mustseeD.mustnthavesee5.-Tomisneverlateforwork.Whyisheabsenttoday？-Something_tohim.A.musthappenB.shouldhavehappenedC
9、.couldhavehappenD.musthavehappened6.Jackdescriblehisfather,who_abraveboy,manyyearsago,asastrong-willedman.A.wouldbeB.wouldhavebeenC.mustbeD.musthavebeen7.I_havewatchthatmovieitllgivemehorribledreams.A.shouldntB.needntC.couldntD.mustnt8.Mark_havehurried.Afterdrivingattopspeed,hearrivedhalfanhourearly
10、.A.needntB.wouldntC.mustntD.couldnt9.Theweatherhasbeenveryhotanddry.-Yes.Ifitrainedevenadrop,thingswouldbemuchbetternow.Andmyvegetables_.A.wouldntdieB.didntdieC.hadntdieD.wouldntdie10.Hedidnotregretsayingwhathedidbutfellthathe_itdifferently.A.couldexpressB.wouldexpressC.couldhaveexpressedD.musthavee
11、xpressed11.-Youreallyshouldnthaveshoutedatthem.-Right,I_crazythen.A.mustbeB.musthavebeenC.couldhavebeenD.shouldhavebeen12.Catherine,Ihavecleanedtheroomforyou.-Thanks.You_it.Icouldmanageitmyself.A.needntdoB.neednthavedoneC.mustntdoD.shouldnthavedone13.FromwhatIlearnabouttheirhotel,theseviceandtheweat
12、her,they_theirholidayverymuch.A.wouldnthaveenjoyedB.shouldnthaveenjoyedC.neednthaveenjoyedD.canthaveenjoyed14.They_havearrivedatlunchtimebuttheirflightwasdelayed.A.willB.canC.mustD.should15.I_throughthatbitterperiodwithouwyourgeneroushelp.A.couldnthavegoneB.didntgoC.wouldntgoD.hadntgoneExercise:1.-I
13、twasaredlight,William.You_thecar.-Sorry,Ididntseeit.A.muststopB.musthavestoppedC.shouldstopD.shouldhavestopped2.-HowcouldIthankyouenough?-Dontmentionit.Anyotherman_that.A.mustdoB.coulddoC.wouldhavedoneD.shouldhavedone3.Walkingaloneinthedesertedvillage,Johnwasscared.Hethoughthe_Tomtogowithhim.A.might
14、haveaskedB.shouldaskC.musthaveaskD.shouldhaveask4.She_thefilm,forsheknowsnothingaboutit.A.cantseeB.canthaveseenC.mustseeD.mustnthavesee5.-Tomisneverlateforwork.Whyisheabsenttoday？-Something_tohim.A.musthappenB.shouldhavehappenedC.couldhavehappenD.musthavehappened6.Jackdescriblehisfather,who_abravebo
15、y,manyyearsago,asastrong-willedman.A.wouldbeB.wouldhavebeenC.mustbeD.musthavebeen7.I_havewatchthatmovieitllgivemehorribledreams.A.shouldntB.needntC.couldntD.mustnt8.Mark_havehurried.Afterdrivingattopspeed,hearrivedhalfanhourearly.A.needntB.wouldntC.mustntD.couldnt9.Theweatherhasbeenveryhotanddry.-Ye
16、s.Ifitrainedevenadrop,thingswouldbemuchbetternow.Andmyvegetables_.A.wouldntdieB.didntdieC.hadntdieD.wouldntdie10.Hedidnotregretsayingwhathedidbutfellthathe_itdifferently.A.couldexpressB.wouldexpressC.couldhaveexpressedD.musthaveexpressed11.-Youreallyshouldnthaveshoutedatthem.-Right,I_crazythen.A.mus
17、tbeB.musthavebeenC.couldhavebeenD.shouldhavebeen12.Catherine,Ihavecleanedtheroomforyou.-Thanks.You_it.Icouldmanageitmyself.A.needntdoB.neednthavedoneC.mustntdoD.shouldnthavedone13.FromwhatIlearnabouttheirhotel,theseviceandtheweather,they_theirholidayverymuch.A.wouldnthaveenjoyedB.shouldnthaveenjoyedC.neednthaveenjoyedD.canthaveenjoyed14.They_havearrivedatlunchtimebuttheirflightwasdelayed.A.willB.canC.mustD.should15.I_throughthatbitterperiodwithouwyourgeneroushelp.A.couldnthavegoneB.didntgoC.wouldntgoD.hadntgone
