unit2grammar

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1、TheSubjunctiveMoodⅡ虚拟语气Grammar2.IfIhadtakenyouradvice,Iwouldn’thavemadeamistake.IfIhadtime,Iwouldcometoseeyou.3.Ifitshouldraintomorrow,theywouldn’tgoforanouting.(现在)(过去)(将来)RevisionRevision一、虚拟语气在条件状语从句中的用法时态If从句的谓语式主句的谓语形式现在过去未来did/werewould/could/should/might+V.(原)would/could/should/might+

2、have+p.p.1.did/were2.shoulddo3.weretodowould/could/should/might+V.(原)haddone二：虚拟语气假设条件句型注意点：假设条件从句谓语动词发生的时间与主句所假设的谓语动词不一致，叫做错综条件虚拟语气。主句和从句的谓语动词要依照假设的时间而定。Iftheweatherhadbeenbetter,thecropswouldbegrowingstillbetter.Ifyouhadfollowedtheteacher’sadvice,youwouldn’tbeinthehospital.1.Ifyou_____himy

3、esterday,you_____whattodonow.asked…wouldknowB.hadasked…wouldhaveknownC.askedhim…knowD.hadasked…wouldknow即学即练D2.Whatwouldhavehappened,_____asfarastheriverbank?A.BobhadwalkedB.ifBobshouldwalkC.hadBobwalkedD.ifBobwalkedC假设条件虚拟倒装。条件从句中有should，were，had三个助动词可以把if省略，并将这三个词提至句首。Ifitwerenotforyouradv

4、ice,wecouldn’thavegotoverthedifficulties.Wereitnotforyouradvice,wecouldn’thavegotoverthedifficulties.IfIhadhadtime,Iwouldhaverunroundthatlakeagain.HadIhadtime,Iwouldhaverunroundthatlakeagain.Ifthereshouldnotbesunlight,people'slifewouldbedifficult.Shouldtherenotbesunlight,people’slifewouldbed

5、ifficult.英语中有些介词短语如without...，butfor...(要不是……)，可以表示虚拟条件，连词but，副词otherwise，并列连词or也可以表示虚拟条件；Withoutsunlight,people’slifewouldbedifficult.Butforyourhelp,Iwouldn’thavefinishedthework.Withoutyourhelp,I(fail)Butforwater,it(be)impossibletoliveinthedesert.wouldhavefailed.wouldbeShewasn’tfeelingveryw

6、ell.Otherwiseshewouldn’thaveleftthemeetingsoearly.通过观察发现：表示现在或将来的情况，谓语动词用“would(或其他情态动词)＋动词原形”；表示过去的情况，谓语动词用“would(或其他情态动词)＋have＋过去分词”。例如：1.ButforthehelpofmyEnglishteacher，I________thefirstprizeintheEnglishWritingCompetition.A.wouldnotwinB.wouldnothavewonC．wouldwinD．wouldhavewon解析：句意：要没有我英语老

7、师的帮助，我不会在英语写作比赛中获得第一名。本题考查虚拟语气用法，根据句意，可知主句应该使用否定式，而本句是与过去事实相反的虚拟语气，故答案为B项。答案：B即学即练2.—Whyareyousolate?—Igotstuckinthetrafficjam，orI________earlier.A．arrivedB．havearrivedC．wouldarriveD．wouldhavearrived解析：由句意“orI________earlier.”知未曾实现的愿望，故选D。答案：D3.Ica