名词性从句之主语从句.ppt

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1、名词性从句之主语从句张雪ProfessorZhangisafamoussicentist.Oursuccessorfailuredependsonthecountry’seconomy.WeoftenspeakEnglishinclass.One-thirdofthestudentsinthisclassaregirls.Tomasteraforeignlanguageisnecessary.Playingfootballinthestreetisdangerous.1.ProfessorZhangisafamouss

2、icentist.Oursuccessorfailuredependsonthecountry’seconomy.(名词）2.WeoftenspeakEnglishinclass.（代词）3.One-thirdofthestudentsinthisclassaregirls.（数词）4.ToswimintheLijiangRiverisagreatpleasure.Tomasteraforeignlanguageisnecessary.（动名词）5.Playingfootballinthestreetisdangero

3、us.（动名词）6.InnewChinatheoldarelivingahappylife.(形容词化名词）Thathewillsucceediscertain.Whethershewillgothereisnotknown.Whatshesaidisnottrue.Whobrokethewindowhasnotbeenfoundout.主语从句：主语从句在复合句中作主句的主语，主句谓语动词为第三人称单数。引导主语从句的引导词有三类：1)连接代词what,who(whom),which,whoseWhathesaidi

4、strue.Whowillcometohelpusisstillunknown.Whoeverisheregetsaprize.WhateverIhavedoneisonlyforyou.2)连接副词:when,where,why,how(howlong,etc.)Whenwe’llhavethesportsmeetwillbediscussedtomorrow.HowsoontheplanewillarriveatBeijingdependsonweather.HowThomasEdisonbecameagreati

5、nventorisknowtoall.Whyhefailedthephysicsexamwasn’tclear.Wherehehasbeenisstillapuzzle.3)连接词:that,whetherThatthemoonisthesatelliteoftheearthisknowntousall.WhetherI’llattendtheconcertornotdoesn’tmattermuch.常用it作形式主语的句型：Itis+名词+nounclauseItisasurprisethatheisn’there

6、.Itisaquestionwhetherwecanfindthis.Itis+形容词+nounclauseItisprobablethatshetoldhimeverything.Itisstrangethathedidn’tpasstheexam.Itis+不及物动词+nounclauseItdoesn’tmatterwhenthey’llbeback.ItsohappenedthatIwasoutthatday.Itis+分词+nounclauseItisreportedthattheconcertwilllas

7、t3days.Itisdisappointingthathedidn’tcome.4)it常用来作为形式主语放在句首代替主语从句.必须用it替代主语从句，放在句首的。1）主句是被动语态时Ithasn’tbeendecidedwhethertheywillgothere.2）主句是疑问式或感叹句时。Isitpossiblethathe’llcome?Howstrangeitisthatthechildrenaresoquiet!*用whatever,whoever等引导的主语从句不能用it作形式主语.Whoeverdo

8、esn’tobeytherulesshouldbepunished.*that引导的主语从句放在句首时that不能省略.Thathewillcomeisknowntoall.*if不能代替whetherWhethershewillcomeisunknown.判断对错Itistruewhathesaid.FIfheleftornot