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1、SubjunctiveMood虚拟语气虚拟语气表示说话人的某种假设、愿望、怀疑、猜测、建议等含义，即动词所表示的动作或状态并非事实，或不可能实现。虚拟语气(TheSubjectiveMood)IfIwereyou,Iwouldgiveitup.Ifitrained/shouldrain/weretoraintomorrow,Iwouldnotgo.IfIhadfollowedyouradvice,Iwouldhavesucceeded.条件从句If从句的谓语形式主句的谓语形式现在过去将来did/werehaddonewould/cou
2、ld/should/might+V(原)would/could/should/might+havedone1.did/were2.should+V.(原)3.weretodowould/could/should/might+V.(原)一).If条件状语从句中虚拟语气的用法。IwishIabird.wereIwish/wished（没吃)somuchwatermelon.Ihadn’teatenIwishitwouldraintomorrow.二).虚拟语气在宾语从句中的用法1.wish的宾语从句主语+did/were现在主语+hadd
3、one过去主语+would/could/might+do将来should2.wouldrather(that)Iwouldratheryoupaidmenow.Iwouldratheryouhadattendedthemeetingyesterday.Don’tcome.Iwouldratheryoucametomorrow.主语+did/were现在/将来主语+haddone过去Thedoctorsuggestedthathe(should)trytolosehisweight. Heinsistedthatwe(should)te
4、llhimthenews.3.表示要求,命令,建议的虚拟语气。从句中使用“（should）+动词原形”的结构。宾语从句中常见动词:一个坚持,两个命令,三个建议,四个要求。即1).insist2).order,command3).advise,suggest,propose4).demand,require,request,ask三）.凡是与“表示要求,命令,建议”意义相同的词，用于名词性从句（主语从句，宾语从句，表语从句，同位语从句）中均要使用虚拟语气“should+动词原形”结构Mydemandisthatsheshouldcome
5、toseemeonceaweek.Allofusarefortheadvicethatthechemicalfactoryshouldbecloseddown.It’srequiredthatthestudentsshouldlearnaforeignlanguage.asif/thoughShelovesthebabyasifitwereherownson.Irememberedthewholethingasifithadhappenedyesterday.（让步状语从句）Itseemsasifitwerespring.（表语从句）
6、主语+did/were现在主语+haddone过去主语+would/could/might+do将来四）asif/though引导的从句的虚拟用法1.Withoutair,therewouldbenolivingthings.2.Iwasillthatday.Otherwise/Or,Iwouldhavetakenpartinthesportsmeeting.3.Butforyourhelp,Iwouldn’thavefinishedtheworksosoon.4.Withamilliondollars,whatwouldyoudo?
7、注意：Otherwise/Or前面的一个句子表示真实的，该是什么时态就用什么时态；但后面的句子必须用虚拟语气。He_________(打电话)toinformmeofyourbirthdayyesterday,orI______________(会知道)nothingaboutit.telephonedwouldhaveknown五）含蓄条件句有时为了表达的需要,在虚拟语气中并不总是出现if引导的条件句,而通过其他手段来代替条件句.常用的介词或短语有：without，with,or,otherwise，butfor(要不是)等。虚拟语
8、气的形式和if的主句相同。would/could/might/shoulddo(现在,将来)would/could/might/shouldhavedone(过去）六）错综时间条件句：当条件从句谓语动词发生的时间与主句的
