SubjunctiveMood(虚拟语气)1.if引导的条件状语从句1)表示与现在事实情况相反或不相符主句中动词的时态从句中动词的时态would/could/might+V原形动词用一般过去时（be--were）a.Iwouldn’tgoifIwereyou.b.Wecouldstarttheworkatonceifyouhelpedme.2)表示与过去事实情况相反或不相符主句中动词的时态从句中动词的时态would/could/might+havedone用过去完成时（haddone）a)Theycouldn’thavefinishedtheworkintimeifwehadn’thelpedthemyesterday.b)Thewoundedsoldiermighthavebeensavedifhehadbeensenttohospitalwithoutanydelay.c)IwouldhaveknownitifIhadcomeyesterday.3)表示与将来事实情况相反或不相符主句中的时态从句中的时态would/could/might+V原形从句中should/wereto+V原形Wewouldn’tgothereifitshouldraintomorrow.ifitweretoraintomorrow.Oraltranslation:1)如果你昨天借钱给我的话，我就能买随身听了。(walkman)2)如果下个月他回来的话，我们就邀请他参加我们的派对。3)如果我是你，我就拒绝他的邀请。If引导的混合条件句中的虚拟语气a)IfIhadboughtaMP3yesterday,Iwould/could/mightbelisteningtomusicnow.b)如果我昨天上课认真听讲的话，我现在就能做这些数学题了。如果if引导的条件状语从句中有以下三个助动词：had,were,should,从句中if可省略，had,were,should置于句首，构成简略倒装。1.IfIwereinyourposition,Iwouldgoatonce.WereIinyourposition,Iwouldgoatonce.2.Ifyouhadworkedhard,youcouldhavedoneitwell.Hadyouworkedhard,youcouldhavedoneitwell.3.Ifitshould(wereto)rainthisweekend,wewouldcancelthesportsmeeting.Shoulditrainthisweekend,---/Wereittorain---2.“Evenif/eventhough即使，纵然；Ifonly要是---就好了”引导的从句也要用虚拟语气,动词的时态与if引导的条件从句相似。IfonlyIwereinHainannow.IfonlyIhadgotwellpreparedforthetestyesterday.3.Wish后接从句时，从句中用虚拟语气。11）IwishIwereyou.2)IwishIcouldremembermoreaboutmyMum.3)IwishIhadmethimyesterday.4.Asif/asthough(似乎、好像)后接从句可用虚拟语气，也可不用虚拟语气。a.PeopleactasifIwereabadordangerousperson.b.Theyaretalkingasiftheyhadbeenfriendsforyears.c.Itlooksasifitisgoingtorain./asifitweregoingtorain.5.表示“建议，要求，命令”的所有动词，名词后接宾语从句，表语从句，同位语从句时要用虚拟语气，动词形式为“(should)+V原形”（动词）建议：suggest,advise,propose,recommend要求require,demand,request,insist（坚决要求）,ask,desire命令：order,command1)Hesuggestedthatwenotcarryouttheplan.2)Itwasdemandedthateffectivemeasuresshouldbetakentotreatthewaste.3)Motheraskedthatthechildrengotobedearlier.4)HeinsistedthathebesenttoworkinTibet.(Heinsistedthathewasright.)(坚持认为)5)Hemadeasuggestionthatweshouldstaythereforthenight.6)Hissuggestionwasthatweshouldstaythereforthenight.6.Itisnecessary/important/natural/strangethatsb+(should)+Vessentiale.g.Itisstrangethathe(should)notattendsuchaconference.7.It’s(high/about)timethatwetookmeasures./weshouldtakemeasures.8.Iwouldratheryouwenttherenow/tomorrow.Iwouldratheryouhadgonethereyesterday.9.Iwasbusyyesterday,otherwiseIwouldhavephonedhim.(otherwise后用虚拟语气，前面句子隐含一种虚拟的条件)（=IfIhadnotbeenbusyyesterday,Iwouldhavephonedhim.）Iwouldhavephonedhim,butIwasbusyyesterday.(but前用虚拟语气，but后面用真实语气)(=IfIhadnotbeenbusyyesterday,Iwouldhavephonedhim.)10.butfor要不是（后面主句要用虚拟语气）a.butfor---表“现在要不是”e.g.Butforhishelp,wecouldn’tstartourworknow.=Ifitweren’tforhishelp,wecouldn’tstartourworknow.b.butfor---表“过去要不是”e.g.Butforhishelp,wecouldn’thavefinishedourworkontme.=Ifithadnotbeenforhishelp,wecouldn’thavefinishedourworkontime.特殊句型概括：1.musthavedon...
