主语从句ppt

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•Iwonder,Mr.Adams,ifyou’dmindusaskingafewquestions?•Ican’tsaythatIhaveanyplans.•ThefactisthatIearnedmypassagebyworkingasanunpaidhandGrammarAtreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.主语从句在句中充当主语的从句叫做主语从句。1.连接词:1)从属连词:that,whether等.that引导主语从句只起引导作用,本身无实际意义,在主语从句中不充当任何成分,但不能省略。Thatshelefthimcuthimtotheheart.Thathewillcomeiscertain.2)连接代词who,what,which,whatever,whichever,whoeverWhatseemseasytosomepeopleseemsdifficulttoothers.Whichsidewillwinisnotclear.由whether及其他连词引导的主语从句放在句首,句后都可。Whetheritwillpleasethemisnoteasytosay.3)连接副词when,where,how,why等Whyhediditremainsamystery.Whentheywillstartisnotknownyet.Howhebecameagreatscientistisknowntousall.主语从句后置!为了避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语.例:Thatweshallbelateiscertain.--It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.--2.Thatyoumissedthechanceisapity.--Itisapitythatyoumissedthechance.It’sknowntoallthattheearthisround.It+be+形容词+that从句Itisnecessarythat…有必要…Itisimportantthat….重要的是…Itisobviousthat……很明显……It+be+-ed分词+that从句Itisbelievedthat…人们相信…Itisknowntous/allthat….众所周知…Ithasbeendecidedthat……已经决定……用it形式主语的that从句有以下四种不同的搭配:It+be+名词+that从句Itiscommonknowledgethat……是常识Itisasurprisethat….令人惊奇的是…Itisafactthat……事实是……It+不及物动词+that从句Itappearsthat…似乎…Ithappensthat….碰巧…Itoccurredtomethat……我突然想起……注意:1.Whatyouleftareonlyseveraloldbooks.2.Whatyousaidisofgreatimportance.3.Whetherhe’llcomehereisnotclear.1.“if”不能引导主语从句,应有“whether”引导。3.主语从句的“that”一般不能省。4.“what”引导主语从句时,谓语动词:1)常与其后的名词作表语一致2)根据句子的语境而定。4.主语从句需注意的问题2.主语从句中用陈述语序MakesentencesIt’scertain.we’llbelate.Ishecomingornot?Wedon’tknowWhatdoeshewanttotellus?Wedon’tknowWhenwillyoucomeback?Itdoesn’tmatter.It’scertainthatwewillbelate.Thatwe’llbelateiscertain.Wedon’tknowwhetherheiscomingornotWhetherheiscomingisnotknown.Wedon’tknowwhathewantstotellus.Whathewantstotellusisnotknown.Whenyouwillcomebackdoesn’tmatter.Itdoesn’tmatterwhenyouwillcomeback.1.Whereshallwespendtheholidayisn’tdecided.2.Youhavemadeamistakeisafact.3.Thatiscertainthatwecanwin.4.Nomatterwholeavestheroomlastoughttoturnoffthelights.5.Ifthepolicemenwillcomeisnotcertain.weshallThatyouhaveItisWhoeverWhether改错练习1.___hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD.How2.___we’llgocampingtomorrowdependsontheweather.AIfBWhetherCThatDWhere3.Itworriedherabit___herhairwasturninggray.A.whetherB.thatC.whatD.when4.WhatIsayandthink___noneofyourbusiness.A.isB.areC.hasDhave1._____youdon’tlikehimisnoneofmybusiness.2._____hesaidatthemeetingastonishedeverybodypresent3.________the2000OlympicGameswillbeheldinBeijingisnotknownyet.4.________we’llgocampingtomorrowdependsontheweather.5.________leavestheroomlastoughttoturnoffthelights.ThatWhatWhetherWhetherWhoever6.___isafactthatEnglishisbeingacceptedasaninternationallanguage.7.Itworriedherabit____herhairwasturninggrey.8.TheForeignMinistersaid,“__isourhopethatthetwosideswillworktowardspeace.”9.AfterYangLiweisucceededincirclingtheearth,____ourastronautsdesiretodoiswalkinspace.ItthatItwhat

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