高二英语Unit1 Grammar课件 人教版 课件VIP免费

1.Ifyoucouldhavethreeofthesepaintingsonthewallsofyourclassroom,whichwouldyouchoose?2.Haveyoueverwishedyoucouldpaintaswellasaprofessionalartist?3.Ifyouwereanartist,whatkingofpictureswouldyoupaint?虚拟语气:表示说话人所说的话不是事实,而是一种主观愿望和假设,猜测,建议,可能或想象。主要用于条件状语从句，或名词性从句。在条件状语从句中的用法：1.IfIwereyou,IshouldstudyEnglish.2.IfIhadtime,Iwouldattendthemeeting.3.IfIwereateacher,Iwouldbestrictwithmystudents.(I’mnotateacher.)表示与现在事实相反时，主从句的谓语动词形式为：从句:If+主语+动词过去式(be用were)主句:主语++动词原形wouldshouldcouldmight1).IfJackhadscoredthatgoal,wewouldhavewonthefootballmatch.2).Ifyouhadtakenmyadvice,youwouldn’thavefailedintheexamination.表示与过去事实相反时,主从句的谓语动词形式为：从句:主句:If+主语+haddone主语++havedonewouldshouldcouldmight1).Ifitweretoraintomorrow,themeetingwouldbeputoff.2).IfitshouldsnownextSunday,theycouldn’tgoout.表示与将来事实相反时,主从句的谓语动词形式为：从句:主句:If+主语+didshoulddoweretodo主语++dowouldshouldcouldmight1).Ifyouhadworkedhard,youwouldbeverytired.当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时,动词的形式要根据它所表示的时间来调整.1).WereIateacher,Iwouldbestrictwithmystudents.2).HadIcomehereyesterday,Iwouldhaveseenhim.=IfIwereateacher,…=IfIhadcomehereyesterday,…如果条件句中有were,should,had,可以省去if,并使用倒装语序.1).Haditnotrained,wecouldhavearrivedearlier.2).Ifhehadmadefulluseoftime,hecouldhavefinishedthework.Ifithadnotrained,Hadhemadefulluseoftime,1).Withoutair,therewouldbenolivingthings.2).Butforyourhelp,Icouldn’thavedoneit.有时用介词短语代替状语从句,句子中也用虚拟语气.1).Fishcouldnotliveiftherewerenowater.Fishcouldnotlive____________.2).Theywouldnothaveenteredthelabiftheyhadnotbeenpermitted.Theywouldnothaveenteredthelab________________.withoutwaterwithoutpermission1).IwishIhadalittlelabofmyown.2).Iwishyouhadfinishedtheworkearlier.3).Shesincerelywishedthatshemightdosomethingtocomforthim.“wish+宾语从句”表示不能实现的愿望时,宾语从句用虚拟语气。意为:“可惜…”,“…就好了”，“但愿…”.１．对现状表达愿望时，动词用过去时形式．２．对过去发生的事情表示遗憾或后悔时，用过去完成时形式．３．对将来表达愿望（虽然可能性极小，但有实现的可能），用would/could/might+动词原形．动词hope后面不用虚拟语气，而用相应的时态表达与过去，现在或将来有关的希望，例如：1).Ihopeyouweren’tlate.我希望你没有迟到.2).Ihopeyouareready.我希望你已经准备好了.3).Ihopehecomestomorrow.我希望他明天来.(可以用一般现在时表达将来)4).Wehopeyou’llbeveryhappy.我们希望你非常幸福.1).IfonlyIhadtakenhisadvice.2).IfonlyIwereabird.Ifonly“用以表示对现实或未来的愿望时，句子用虚拟语气，意思是“但愿…”,“要是…就好了”，Onlyif用于句首，后接从句，主句的主谓倒装．意为：“只要，只有”，如：Onlyifateacherhasgivenpermissionisastudentallowedtoenterthisroom.1.Youdidn’tletmedrive.Ifwe_____inturn,you_____sotired.A.drove;didn’tgetB.drove;wouldn’tgetC.weredriving;wouldn’tgetD.haddriven;wouldn’thavegot2._____itraintomorrow,weshouldhavetoputoffthevisittotheYangpuBridge.A.WereB.ShouldC.WouldD.Will3.Withoutelectricityhumanlife_____quitedifferenttoday.A.isB.willbeC.wouldhavebeenD.wouldbe4.ItoldSallyhowtogetthere,butperhapsI_____forher.A.hadtowriteitoutB.musthavewrittenitoutC.shouldhavewrittenitoutD.oughttowriteitout5.Ididn’tseeyoursisteratthemeeting.Ifshe_____,shewouldhavemetmybrother.A.hascomeB.didcomeC.cameD.ha...