—、虚拟语气用于if条件状语从句。与时态有关1.不同时间段，if主从句分别使用的时态。If条件状语从句主句现在Did/wereCould/would/might/shoulddo过去haddonesthCould/would/might/shouldhavedone将来did/wereshoulddosthweretodosthCould/would/might/shoulddo祈使句Ifitrained(rain),don’texpectme.2.If的省略：把从句中should,had,were提前,if可以省略。3.错综时间条件句：Ifyouhadtaken(take)themedicine,youwouldfeel(feel)betternow.4.虚拟条件句中可含有陈述语气的从句：Ifitwere(be)notforthatfactthatyouwas(be)ill,Iwouldask(ask)youtodothisrightnow.5.含蓄条件句：时态跟主句含有介词或是介词短语under,with,without,butthat含有连词:or,otherwise,but,butthatButforyourhelp,Iwouldhavefailed(fail)then.Iwasbusy,otherwiseIwouldhavegiven(give)youmorehelp.6.“…如果没有〞Ifitwasnotforsth，表示同现在事实相反的假设。“…如果当时没有〞Ifithadnotbeenforsth，表示同过去事实相反的假设。Ifitwerenotfortherain,thecropswoulddie(die).Ifithadnotbeenforyourtimelyhelp,Iwouldhavebeenfailed(fail).7、虚拟语气用于wish,ifonly,asit(though)等句中用法谓语动词形式与现在事实相反did/were与过去事实相反haddonesth/couldhavedonesth与将来事实相反would/could/mightdosth8、虚拟语气在wouldrather后接从句的应用：现在/将来sbdidsthWouldrather+从句过去：sbhaddonesth9、sbdidsthIt’s(high/about)timethatsbshoulddosthsbweredoingsth与should有关1、虚拟语气在某些从句中的运用。二主张insist，urge二命令order，command四要求request,require,ask,demand四建议advise,suggest,propose,recommendHesuggestedthatwe(should)dosthItissuggestedthatwe(should)dosthHegavemeasuggestionthatwe(should)dosthThemaninsistedthathedid/haddone(do)nothingwrongandthatheshouldbe(be)setfreerightaway.Hisaccentsuggeststhathecomes(come)fromthesouth.Isuggestedthatwecarryout(carry)outtheplan.Theordercamethatthemedicalsuppliesshouldbesent(send)tothevillagesoon.2、It’s+strange,important,essential,natural…thatsb〔should〕+dosthIt’s+apity/ashame/nowonder…thatsb〔should〕+dosth虚拟语气专项练习题()1.Theteacherdemandedthattheexam_____beforeeleven.A.mustfinishB.wouldbefinishedC.befinishedD.mustbefini...
