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1、虚拟语气1.Iwish(that可省略,下同)Iknewtheanswertothequestion.我希望知道这个答案。(事实上是不知道)2.Hewisheshehadn'tlostthechance.他真希望没有失去机会。(其实已失去)3.Youwishedshewouldarrivethenextday.(would+arrive)你希望她第二天会到。(事实上她还没到)SubjunctiveMood作为专门表达假设意义和其他非事实意义的动词形式，仅是古英语遗留下来的残余。它仅有两个形式，即be型虚拟式和were型虚拟式。
2、Be型虚拟]-----be型虚拟式是以动词原形表示的，不管主语是什么人称，动词一律用原形，如动词为被动态，则助动词be也用原形。其主要用法如下：1)用于表命令、决定、建议、坚持等词语之后的that分句中这一用法又分三种情况：a)用在decide,decree,demand,insist,move,order,prefer,propose,recommend,request,require,suggest,vote等动词之后的that分句中.（宾语从句）在expect,believe,think,suspect等动词的否定或疑问
3、形式后的宾语从句中，我们经常用“should＋动词原形(或完成形式)”，表示惊奇，怀疑，不满等。Heorderedthatallthebooksbesentatonce.Heorderedthatallthebooksbesentatonce.weproposethatsomebodyneutraltakethechair.Sheinsistedthatshegotothesouthforherholiday.b)用在advisable,appropriate,desirable,essential,fitting,imper
4、ative,important,impossible,necessary,obligatory,proper等形容词之后的that分句中。（主语从句）Itisessentialthatallthefactsbeexaminedfirst.Itwasappropriatethatthisitaxbeabolished.Ithoushtitadvisablethatanarmedguardstandinreadiness.c)用在decision,decree,demand,instruction,order,requiremen
5、t,resolution等名词之后的that分句中。TheboardhasgiveninstructionsthattheagentflytoBoston.Wewerefacedwiththedemandthatthistaxbeabolished.Theirdecisionwasthattheschoolremainclosed.在这一用法中be型虚拟式能与“should+不定式”交替使用，也能与to-不定式交替使用。Heorderedthatthebooksbesentatonce.=Heorderedthattheboo
6、ksshouldbesentatonc.=Heorderedthatthebookstobesentatonce.2）用于由if,though等引导的分句中.be型虚拟式能用于由if,though,whatever,lest,solongaslest,forfearthat,incasesothat,inorderthat等引导的分句中表推测、让步、防备等含义。Ifhebefoundguilty,Jonhshallhavetherightofappeal.Thougheveryonedesertyou,Iwillnot.Qui
7、tlywesatontheriverbanklestthefishswimaway.上述用法现在只限于书面体，在非正式语体中通常用动词陈述式或者用should/may+不定式。Whateverhisdefensemaybe,wecan’ttoleratethisdisloyalty.3）用于某些公式化语句中be型虚拟式用于某些公式化语句中可表祝愿、诅咒、禁止等意义。LonglivethePeople'sRepublicofChina!Godblessyou!Goddamnyou!Sobeit.(但愿如此吧)Were型虚拟]--
8、---Were型虚拟语气只有一种形式，即无论主语是什么人称，动词一律用were，如Iwere，youwere，如果动词为进行体或被动态，其助动词也一律用were，如Iweregoing，youweregoing，Iweresent，youweresent1）用于某些状语从句如
