•if引导虚拟条件句a.真实条件句表示条件是真的或有可能实现的,采用陈述语气。真实条件句用于陈述语气,假设的情况可能发生,其中if是“如果”的意思条件从句一般现在时主句will\shall+动词原形Whatwillyoudoifitrainstomorrow?Iwillstayathomeifitrainstomorrow.b.虚拟条件句表示条件是无法实现或几乎无法实现的,采用虚拟语气。a.Ifthere________(be)nonaturalresourceanymoreinthefuture,we___________(make)useofnuclearpower(核动力).shouldbeshouldmakeb.IfRobots_____________(control)theworldsomeday,there________(be)nofriendship.weretocontrolwouldbeIf引导的虚拟语气(ifonly要是…就好了从句倒装If条件句从句主句Were+主+……与现在事实相反If+were过去式主+should/would/could/might+doHad+主+done+…与过去事实相反If主+haddone主+shouldwould/could/might+havedoneShould/Were+主+……与将来事实相反If+过去式WeretodoShoulddo主+shouldwould/could/might+do省略if的虚拟条件句的倒装IfIwereObama’sdaughther,Iwouldbehappy.WereIIfIhadhadanotherchance,Iwouldhaverunfaster.HadIhad5.省略if的虚拟条件句的倒装把were,had,should提到句首Ifheshouldactlikethatagain,hewouldbefiredimmediately.Shouldhe….6.混合条件句IfIhadgotupearlythismorning,Iwouldn’tbelateforclassnow.Igotuplate,otherwiseIwouldn’tbelateforclassnow.otherwise引导的虚拟语气虚拟otherwise从句现在主+would/could/minght/should+do过去主+wouldhave+done+……将来主+would/could/minght/should+do主+过去式Otherwise/without/butforWithoutyourhelp,Iwouldn’thavepassedtheexamIftherehadn’tbeenyourhelp,Iwouldn’thavepassedtheexam.Butforyourhelp,Iwouldn’thavepassedtheexam.wishwish引导的虚拟语气虚拟wish从句现在主+were/过去式过去主+had+done+……将来主+would+could/might+doIwishIwereabird.IwishI_______________________________(2)表示对过去情况的虚拟:从句动词常用“had+过去分词”。hadn’teatensomuchwatermelon.(3)表示对将来的主观愿望:从句动词形式为“would/could/might+动词原形”。有should吗?Iwishitwouldraintomorrow.asif/asthoughAsif\though引导的虚拟语气虚拟Asif从句现在主+were/过去式过去主+had+done+……将来主+shouldwould/could/mightdoHebehavesasifhe______(own)thehouse.ownedShetalksaboutRomeasthoughshe__________(be)thereherself.hadbeenWouldratherwouldrather引导的虚拟语气虚拟Wouldrather从句现在主+过去式过去主+had+done+……将来主+过去式Iwouldratheryou________(pay)menow.paidIwouldratheryou_____________then,too.Don’tcome.Iwouldratheryou_________(come)tomorrow.hadgonecame表示建议、命令、要求、坚持表示要求,命令,建议的虚拟语气宾语从句中常见动词:一个坚持,两个命令,四个建议,四个要求。urge即1).insist2).order,command3).advise,suggest,proposerecommend4).demand,require,request,desireHedemandedthattheclassroom___atonce.A.shouldcleanB.cleanC.shouldhavebeencleanedD.becleaned1.Hesuggestedthatwe____(have)ameetingatonce.2.Hispalefacesuggestedthathe___(be)ill.havewasIt’sawonder\apity\ashame\aproposal\suggestion\request…It’snecessary/strange/natural/appropriate…It’ssuggested/requested/desired/recommended/proposed…that+主语+(should)+VIt’s(about/high)time+that你该走了。It’shightimethatyouwent.It’shightimethatyoushouldgo.过去时should+V.If引导的虚拟语气(ifonly要是…就好了从句倒装If条件句从句主句Were+主+……与现在事实相反If+were过去式主+should/would/could/might+doHad+主+done+…与过去事实相反If主+haddone主+shouldwould/could/might+havedoneShould/Were+主+……与将来事实相反If+过去式WeretodoShoulddo主+shouldwould/could/might+dowish引导的虚拟语气虚拟wish从句现在主+were/过去式过去主+had+done+……将来主+would+could/might+doAsif\though引导的虚拟语气虚拟Asif从句现在主+were/过去式过去主+had+done+……将来主+shouldwould/could/mightdowouldrather引导的虚拟语气虚拟Wouldrather从句现在主+过去式过去主+had+done+……将来主+过去式otherwise引导的虚拟语气虚拟otherwise从句现在主+would/could/minght/should+do过去主+wouldhave+done+……将来主+would/could/minght/should+do主+过去式It’snecessary/strange/natural/important+that+主+should+VItisimportantthatwe(should)masteraforeignlanguage.Itisstrangethatsherefusetocometotheparty.It’snecessarythatweshouldstudyhard.It’s(about/high)time+that你该走了。It’shightimethatyouwent.It’shightimethatyoushouldgo.过去时should+V.