重庆大学高一(2)Unit2重庆大学高一(2)Unit2WhyistheroadWhyistheroadsowet?sowet?ItItmusthaverainedmusthaverainedlastnight.lastnight.musthavedonemusthavedone对过去的非常肯定的对过去的非常肯定的推测推测（语气最强）（语气最强）对已发生的过去情况的推测，若陈述句谓语部分有“musthavedone”，而且有表示过去的时间状语,问句部分用didn't；1)Theymusthavegonetherelastnight,didn'tthey?2)Theymusthavearrivedbynow,haven’tthey?对已发生的过去情况的推测，若陈述句谓语部分有“musthavedone”，若没有表示过去的时间状语，问句部分用haven’t或hasn’t.3)HemusthavebeentotheGreatWall,hasn'the?对已发生的过去情况的推测，若陈述句谓语部分有“musthavedone”，若没有表示过去的时间状语，问句部分用haven’t或hasn’t.这个房间昨天肯定被清扫了。Theroom_____________________yesterday.musthavebeencleaned他一定已经背了5000单词了。He_____________5,000words.musthavelearntYoumusthaveseenthefilm“JourneytotheWest”,___________?haven’tyouTheymusthavebeentotheWorldExpolastweek,_________?didn’ttheyA:Wherearethegirls?Cantheyhavegonehome?B:No,theycan’thavegonehome.It’ssoearly.canhavedonecanhavedone对过去的疑问推测对过去的疑问推测can’thavedonecan’thavedone对过去的否定推测对过去的否定推测疑问句疑问句和和否定句否定句--WhereisJohn?Canhehavegonetotheplayground?--No,hecan’thavegonetotheplaygroundItisraining.--____MrKing_____________theletter?金先生已经收到那封信了吗？--No,he__________________it.不，他不可能收到。Canhavereceivedcan’thavereceived--Look,thelightsareoffintheirroom.--Wherehavetheygone?--Theymighthavegonetothecinema.may/mighthavedone某事有可能发生过(表示对过去的不太肯定的推测，语气比musthavedone弱)用于肯定句用于肯定句和否定句和否定句(may(may的语气的语气比比mightmight稍强稍强))---WheredidAdamgetthatnewfootball?Hehasn’tgotanymoney.---It____apresent.Afterall,itwashisbirthdaylastweek.A.mighthavebeenB.mightbeHe______outbecausethelightwason.A.maynothavegoneB.mayhavenotgoneC.maynotgoD.mustnothavegoneA:Hereisadollforyourdaughter.B:Thankyousomuch.It’sbeautiful.Butyouneedn’thaveboughtit.Shehassomanyathome.needn’thavedoneneedn’thavedone本没有必要做某事本没有必要做某事（但此事已做）（但此事已做）We___________________theplantbecauseitrainedlastnight.(本无必要)needn’thavewateredOh,I'mnotfeelingwellinthestomach.Ishouldn’thaveeatensomuchfriedchickenjustnow.shouldn’thavedone本不该做某事（但此事已做）表示责备表示责备Heshouldhaverepairedthebikeyesterday.shouldhavedone本应该做某事（但此事未做）表示责备表示责备你本应该先完成你的作业。You________________yourhomeworkfirst.shouldhavefinished你本不应该跟我撒谎。You________________tome.shouldn’thaveliedFindingtheruleModalverbs+havedoneExplanationsExamplesentencesmusthavedoneItmusthaverainedlastnight.Believingwhathappenedinthepastisthecase(usedonlyinpositivesentences)can/couldhavedone--WhereisJohn?Canhehavegonetotheplayground?--No,hecan’thavegonetotheplayground.Itisraining.indicatingthatsomethingwasapossibilityinthepast,thoughitdidnotactuallyhappen(negativeorinterrogativesentences)may/mighthavedoneTheymighthavemistakenyou.Suggestingthatitispossiblethatsomethinghappenedorwastrue(usedonlyinpositive/negativesentences)should/shouldn’thavedoneYoushouldhavedoneyourhomeworkfirst.indicatingthatsomethingdidnot/didhappen,butthespeakerwishesithad(not)happened.needn’thavedoneYouneedn’thavewateredtheplant.Itrainedlastnight.indicatingthatitisnotnecessaryforsb.todosth,thoughhe/shedidit.高考例析1...
