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1、第16讲虚拟式16.1be-型虚拟式be型虚拟式是指动词永远使用原形,不管主语是什么,动词都为原形.1)用于表示命令,决定,建议等词语之后的that分句中A)表示命令决定建议的动词之后的从句,如动词:decide,decree,demandinsist,move,order,prefer,propose,recommend,request,suggest,vote等Heorderedthatallthebooksbesentatonce.Weproposethatsomebodyneutraltakethechair.Thedoct
2、orinsistedthathenoteatmeat.B)表示命令决定建议的名词之后的从句,如名词:decision,decree,demand,instruction,order,requirement,resolution等Wewerefacedwiththedemandthatthistaxbeabolished.Youradvicethatshewaittillnextweekisreasonable.Hisorderthatthetroopsnotbesentatoncewascarriedout.C)用在一些形容词后的真
3、实主语从句中.如形容词:advisable,appropriate,desirable,essential,fitting,imperative,important,impossible,necessary,obligatory,proper等.Itisessentialthatallthefactsbeexaminedfirst.Itisnecessarythathecomebackwithoutdelay.Ithoughtitadvisablethatanarmedguardstandinreadiness.2)用于由if,th
4、ough等引导的分句中.推测,让步,防备等含义.if,though,whatever,lest,solongasIftherumourbetrue,everythingispossible.Thougheveryonedesertyou,Iwillnot.Whateverbehisdefense,wecannottoleratethisdisloyalty.3)用于某些公式化语句中LonglivethePeople’sRepublicofChina.Godblessyou!Sobeit.SufficeittosaythatIknow
5、nothing.Farbeitfrommetocallhimathief.Iwillstayherewithyouifneedbe.16.2were-型虚拟式were型虚拟式只有一种形式,即不管主语是什么,动词一律用过去式,be动词一律用were.1)用于某些状语分句中.常用于if,ifonly,asif,asthough,though引导的非真实从句IfIwereyou,Ishouldwaittillnextweek.Ifitweretorain,thegamewouldbeputoff.HespoketomeasifIwered
6、eaf.Hebehavesasthoughhewerebetterthanus.IfonlyIwerenotsonervous.2)用于wish,wouldrather,suppose,imagine引导的从句中,也表示非真实的臆想.Iwishitwerespringalltheyearround.I’dratherIwerenotatthesiteoftheaccident.Supposetheearthwerefalt.Justimagineeveryoneweretogiveupsmoking.16.3假设意义表示法综述1)表
7、示假设意义的一些结构A)It’stimethat…It’stimewewenttobed.You’vebeenworkinghard.It’stimeyoutookarest.It’shightimeweleftthisplace.B)Iwouldrather/soonerthat…Iwouldrathershegothomealittleearlier.I’dratherhetoldmethetruth.Iwouldratherhehadbeenpresent.C)Ifonly…IfonlyIknewheraddress.Ifon
8、lyIhadgonebytaxi.D)behavesasif/asthough…Hebehavesasifheownedthisplace.Shewassittingquietlyinthegardenasif/asthoughnot
