主语从句ppt课件

.,NounClauses-Thesubjectclause,ByDebby,.,Grammar,Whatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.,.,“Howdoyoudo?”isagreeting.Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.,.,主语从句（NounClausesastheSubject）,定义：用作主语的从句叫主语从句，它是名词性从句之一。引导主语从句的连接词有：连词that,whether；连接代词who,what和which；连接副词when,where,how和why。,.,主语从句的连接词,连词that(无词义,不作成分,不能省略);whether(是否),if不能位于句首。Thathewillcomeandhelpusiscertain.Whetherwewillsucceedisstillaquestion.Itisnotknownifhewillcome.,注意:已确定的事由that引导;没决定的事由whether引导.,.,主语从句常用it作形式主语放句首,因而我们常见到这种句式：It+be+n./adj/-ed从句（that,whether,etc.)例：Itsapitythatyoushouldhavetoleave.=Thatyoushouldhavetoleaveisapity.ItisgreatthatIhaveateacherlikeyou.=ThatIhaveateacherlikeyouisgreat.,.,2)连接代词who，what，which,whatever,whichever,whoever充当成分，有具体意义,Whatseemseasytosomepeopleseemsdifficulttoothers.Whichsidewillwinisnotclear.,3)连接副词when，where，how，why等。Whyhediditremainsamystery.Whentheywillstartisnotknownyet.Howhebecameagreatscientistisknowntousall.,.,2.位置：主语从句可以前置，也可以后置。用it做形式主语，而把主语从句，在句末，常用下面几种句型。,1）It+be+表语+主语从句表语：（名词，形容词，过去分词）Itisafact(ashame,apity,goodnews)that,Itisstilluncertainwhetherheiscomingornot.ItisanhonourthatIwasinvitedtoattendthemeeting.,.,Itiscertainthatshewilldowellinherexam.ItistruethatItoldhereverything.,ItissaidthatMr.GreenhasarrivedinBeijing.ItisreportedthatChinahassentanothermanmadeearthsatelliteintoorbit.,.,2）It+不及物动词+主语从句Itseemed(happened,doesntmatter,hasturnedout)that,Ithappensthattheywereabsent.ItseemsthatAliceisnotcomingtothepartyatall.,Itdoesntmatterwhethershewillcomeornot.Itmakesnodifferencewhereweshallhavethemeeting.,.,3)It+及物动词（被动语态）+主语从句,IthasbeendecidedthattheexhibitionwillnotopenonSundays.,注意:,1）主语从句在句首时，必须由连接词引导，不能省略这些连接词；但是如果用it做形式主语，而把主语从句放在句末时，从属连词that可以省略。,.,4).用于Itisimportant/natural/necessary/impossiblethat.句型中,主语从句应使用虚拟语气,谓语动词用“should+动词原形”的形式,should有时可以省略。5)在It+be+suggested/advised/ordered/requested/insisted/required中,that从句的谓语也应该用“should+动词原形”的形式,should有时可以省略。,.,3.主语从句需注意的问题(1)主语从句中用陈述语序WhatsheisafraidofistheirtakinghertoParis.(WhatissheafraidofWrong)(2)主语从句后谓语动词用三人称单数Thattheyhaventphonedisstrange.,(3)that引导的主语从句中，that不可被省略Thatpricewillgoupiscertain.,.,4.what与that在引导主语从句时的区别what引导主语从句时在句时在从句中充当句子成分，如主语宾语表语，而that则不然。例如：1)Whatyousaidyesterdayisright.2)Thatsheisstillaliveisaconsolation.,What在此引导主语从句,又做said的宾语,That只起连接作用,不做成分,.,practice,.,1.Whereshallwespendtheholidayisntdecided.,2.Youhavemadeamistakeisafact.,3.Thatiscertainthatwecanwin.,4.Nomatterwholeavestheroomlastoughttoturnoffthelights.,5.Itisimportantthatastudentlearnsaforeignlanguage.,weshall,Thatyouhave,Itis,Whoever,shouldlearn,改错练习,.,Describeyourmotherwithyourpartner.,Suggestedstructures:Whatmymotherlikesis_.Whatmymotherdoesntlikeis_Whethermymotherwouldfeelhappyis_Whymymotherwouldbehappyis_Whymymotherfeelsupsadis_,.,1._youdontlikehimisnoneofmybusiness.2._hesaidatthemeetingastonishedeverybodypresent3._the2000OlympicGameswillbeheldinBeijingisnotknownyet.4._wellgocampingtomorrowdependsontheweather.5._leavestheroomlastoughttoturnoffthelights.,That,What,Whether,Whether,Whoever,.,6._isafactthatEnglishisbeingacceptedasaninternationallanguage.7.Itworriedherabit_herhairwasturninggrey.8.TheForeignMinistersaid,“_isourhopethatthetwosideswillworktowardspeace.”9.AfterYangLiweisucceededincirclingtheearth,_ourastronautsdesiretodoiswalkinspace.,It,that,It,what,.,特殊句式,1.Ihate_whenpeopletalkwiththeirmouthsfull（MET98）A.itB.thatC.theseD.them2.Ifeel_strangethatheshouldbesocareless.A./B.itC.thatD.how3.Itworriedherabit_herhairwasturninggrey.（MET92）AwhileB.thatCifDfor,.,1._madetheschoolproudwas_morethan90ofthestudentshadbeenadmittedtokeyuniversities.A.What;becauseB.What;thatC.That;whatD.That;because,.,2._wewillgocampingtomorrowdependsontheweather.A.IfB.WhetherC.ThatD.Where3_thattheycanpassthewrittenexamthistime.A.ThatishopedB.ItishopedC.IthopesD.Thathopes,.,5._leavestheroomlastoughttoturnoffthelights.A.AnyoneB.ThepersonC.WhoeverD.Who,6._isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It,C,D,.,7._inthenewspaperthatthepriceoffoodwillgoup.A.ItsaysB.ItissaidC.IthassaidD.Heissaid,8.Itworriedherabit_herhairwasturninggrey.A.whileB.thatC.ifD.for,B,B,.,9.Thereisnodoubt_.A.thatMr.HansenisingoodhealthB.whetherisMr.HansenhealthyC.ifMr.HansenshealthwasreturningD.whetherMr.Hanseninhealth,A,.,10.TheForeignMinistersaid,“_ourhopethatthetwosideswillworktowardspeace.”A.ThisisB.ThereisC.ThatisD.Itis,D,.,11.Itisnecessarythatacollegestudent_atleastaforeignlanguage.A.mastersB.shouldmasterC.masteredD.willmaster,B,.,6.It作形式主语和it引导强调句的比较,It作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。例如：Itisapitythatyoudidntgotoseethefilm.Itdoesntinterestmewhetheryousucceedornot.Itisinthemorningthatthemurdertookplace.ItisJohnthatbrokethewindow.,.,1.Ireadaboutitinsomebookorother,doesitmatter_itwas?（01北京春季)AwhereBwhatChowDwhich,2.AfterYangLiweisucceededincirclingtheearth,_ourastronautsdesiretodoiswalkinspace.（04上海）A.whereB.whatC.thatD.how,3.Fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspe