新编英语语法教程第16讲.ppt

第16讲虚拟式?-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,mend,request,suggest,vote等?Heorderedthatallthebooksbesentatonce.?Weproposethatsomebodyneutraltakethechair.?Thedoctorinsistedthathenoteatmeat.?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):advisable,appropriate,desirable,essential,fitting,imperative,important,impossible,necessary,obligatory,proper等.?Itisessentialthatallthefactsbeexaminedfirst.?ebackwithoutdelay.?Ithoughtitadvisablethatanarmedguardstandinreadiness.?2)用于由if,though等引导的分句中.?推测,让步,,though,?whatever,lest,solongas?Iftherumourbetrue,everythingispossible.?Thougheveryonedesertyou,Iwillnot.?Whateverbehisdefense,wecannottoleratethisdisloyalty.?3)用于某些公式化语句中?LonglivethePeople'sRepublicofChina.?Godblessyou!?Sobeit.?SufficeittosaythatIknownothing.?Farbeitfrommetocallhimathief.?Iwillstayherewithyouifneedbe.?-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),ifonly,asif,asthough,though引导的非真实从句?IfIwereyou,Ishouldwaittillnextweek.?Ifitweretorain,thegamewouldbeputoff.?HespoketomeasifIweredeaf.?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'ident.?Supposetheearthwerefalt.?Justimagineeveryoneweretogiveupsmoking.