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1、虚拟语气SubjunctiveMoodGRAMMAR语法陈述语气Iwenttothetheatreyesterday. Jackhadn’tcomebackhomeyet.祈使语气Let’sgo. Don’ttouchanythingonthetableuntilthebellrings.一.语气的分类英语的动词一般可带三种不同的语气:陈述语气,祈使语气和虚拟语气。不同的语气用动词的不同形式来表示。虚拟语气IfIwereyou,Iwouldnotleaveheralone. Ourteachersuggestedthatwegotothelibrarythisafternoon.(TheS
2、ubjunctiveMood)表示说话人所说的话不是事实,而是一中假设,愿望,怀疑或推测.虚拟语气主要用于if条件状语从句,也可用于名词性从句等.由‘if’引导的虚拟条件句叫作‘if’虚拟条件句IcouldeasilyrecognizeifIhadseenhimbefore.其他虚拟条件句Withoutyourhelp,Icouldn’thavefinishedmyworkontime.三.ifSentenceStructure ‘if’虚拟条件句的结构a.表示与现在事实相反的假设b.表示与过去事实相反的假设c.表示与将来事实相反的假设虚拟语气在‘if’条件句中的用法，主要看谓语动词的变化
3、。1）表示与现在事实相反条件从句主句一般过去时（be多用were）would/should/could/might＋动词原形例如：IfIwereyou,Ishouldaccepttheinvitation.如果我是你，我会接受邀请的。IfIhadtime,Iwouldgothere.如果我有空，我就去那儿。Whatwouldyoudoifyouwonthelottery?IfIwonthelottery,Iwould…IfIwonthelottery,Iwouldbuyanexpensivecar.IfIhadalotofmoneyIwouldbuyavilla.a.Ifthey____(
4、be)here,they__________(take)youradvice.b.Iftheworld-war_____(burst)outagain,what_____________(happen)toourpeopleonearth?werewouldtakeburstwouldhappenPRACTICE1:Fillintheblanks.c.Ifthepoliceman________(benot)inthatroom,it________(be)verydangerous.d.IfI____(be)inyourposition,I_________(ask)forteacher
5、’shelp.werenotcouldbewerewouldask2）与过去事实相反条件从句主句过去完成时would/should/could/might＋havedone例如：Ifyouhadcomeearlier,youcouldn´thavemissedthebus.如果你早点来，你就不会错过那辆公共汽车了。Ifhehadseenyouyesterday,hewouldhavereturnedyourbook.如果他昨天见到了你，他就会还你的书的。Ifhe__________morecarefully,he_________________thecaraccidentyesterda
6、y.haddrivenwouldnothavehadIfI________howtoswim,I__________________trappedinthisisland.hadlearntwouldnothavebeena.IfTom________(be)morecarefulintheexam,he________________(pass)italready.b.Ifyou_______(get)upearlier,you________________(catch)thefirsttrain.hadbeenwouldhavepassedhadgotwouldhavecaughtP
7、RACTICE2:Fillintheblanks.c.IfI_______(meet)youyesterday,we______________(go)totheconcerttogether.hadmetwouldhavegone3）与将来事实可能相反条件从句主句一般过去时（be多用were）shoulddo,weretodowould/should/could/might＋动词原形例如：Ifheweretocome,
