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1、虚拟语气分三种情况来掌握：1、虚拟条件句。2、名词性虚拟语气。3、虚拟语气的其他用语。一、虚拟条件句：条件状语从句是非真实情况，在这种情况下要用虚拟语气。1、条件从句与现在事实不一致，其句型为：If主语+过去吋，主语+should(could,would,或might)+动词原形，女山IfIwereyou,Iwouldstudyhard・Ifitrained,Iwouldnotbeherenow.2、条件从句与过去事实不一致，句型为：If主语+had+过去分词，主语+should(could,would,或might)+have+过去分词,如：Ifthedoctorhadcomelastn
2、ight,theboywouldhavesaved・IfIhadnotstudiedhard,Iwouldhavefailedintheexamlastterm.3、条件从句与将来事实不一致，句型为：If主语4-should(wereto,过去时)+do,主语+should(could...)+原形do,如1：Ifitshouldraintomorrow,wewouldstayathome.IfIweretogotothemoononeday,Icouldseeitwithmyowneyes.Ifyoumissedthefilmtonight,youwouldfeelsorry.注意问题：
3、1、If条件句中绝对不可出现”would”。2、根据句屮的吋间状语，有时可能出现“混合虚拟”的情况，即主句可能是现在的情况，条件句也许是发生在过去的情况，但都是遵守上述句型。3、在条件句屮如果出现were,had,should可省去if,将主语与这些词倒装，例如:Hadthedoctorcomelastnight,theboywouldhavesaved.WereItogotothemoononeday,Iwouldseeitwithmyowneyes.Shoulditraintomorrow,wewouldstayathome.二、名词性虚拟语气：在表示命令、建议要求、惊叹时的名词性从句
4、中需用虚拟语气，基本句型：主语+（should）+动词原形，如:MotherinsistedthatJohngotobedat9ofclock.（宾语从句）Wesuggestedthatthemeetingshouldnotbeheld.Itwasrequiredthatthecropsshouldbeharvestedatonce.（主语从句）Thesuggestionthathebeinvitedwasrejected.（同位语从句）Thatistheirdemandthattheirwagesbeincreased.（表语从句）注意：在这种句子中绝不出现”would””nwst””c
5、oulcT等。三、虚拟语气在一些特殊词中的使用或含蓄条件句：1、wish后的宾语从句：与现在愿望不一致主语+过去时：IwishIwereyou.与过去愿望不一致主语+had+过去分词：IwishIhadvisitedthewhiteHousewhenIwasinthestates.与未来愿望不一致主语+would(could)+原形：IwishIcouldmeetyoutomorrowattheparty.2>lt*stime句型：当It'stime后用that从句时应该为“主语+should+原形”或“主语+过去时”，例如：Itstimethatyouwenttoschool.或ltfs
6、timethatyoushouldgotoschool.3、Ifonly引起的感叹句相当于“HowIwish+宾语从句'Ifonlyhecouldcome!他要能来就好了。IfonlyIhadknowntheanswer!我要早知答案就好了。4、wouldrather,asif(though)引导的句子也需使用虚拟，表示过去的情况用过去完成时，表示现在与将来的情况用过去时，如：rdratheryoupostedtheletterrightaway.rdratheryouhadreturnedthebookyesterday.Shelovesthechildrenasiftheywerehe
7、rs.AlantalkedaboutRomeasifhehadbeenthere.5、without,but,butfor,otherwise引起的短语或句子常暗含着含蓄条件：Withoutyou,Iwouldneverknowhim.Butforyourcooperation,wewouldnfthavedonetheworksowell.=Ifitwerenotforyourcooperation,wewewould
