表语从句讲课ppt课件.ppt

Unit3Grammar表语从句表语从句一、表语从句的定义：一、表语从句的定义：表语从句放在连系动词之后，充当表语从句放在连系动词之后，充当复合句中的表语。复合句中的表语。The question is who will do it.The question is who will do it.系动词系动词表语从句表语从句二、表语从句的构成：二、表语从句的构成：（系动词系动词）+引导词引导词+简单句简单句WhatIwanttosayisthatIamtired.引导词引导词表语从句表语从句用做表语的从句叫表语从句位置：位置：一般放在系动词一般放在系动词be,后后.The problem is that we have little money.That is what he wants us to do.That is where she got her masters degree.三、引导表语从句的关联三、引导表语从句的关联词的种类：词的种类：1.可接表语从句的连系动词有可接表语从句的连系动词有be（is,am,are,was,were）,look,seem,sound,appear等。等。Chinaisnolongerwhatsheusedtobe.今日的中国不再是过去的中国了。今日的中国不再是过去的中国了。Thequestionremainswhethertheywillbeabletohelpus.问题还是他们能否帮我们。问题还是他们能否帮我们。Atthattime,itseemedasifIcouldntthinkoftherightword.当时，我似乎怎么也想不出当时，我似乎怎么也想不出一个恰当的字眼来。一个恰当的字眼来。2.从属连词从属连词whether,as,asif/though引导的表语从句引导的表语从句Helookedjustashehadlookedtenyearsbefore.他看起来还与十年前一样。他看起来还与十年前一样。Itsoundsasifsomeoneisknockingatthedoor.听起来好像有人在敲门。听起来好像有人在敲门。3.because,why引导的表语从句引导的表语从句Thatsbecausehedidntunderstandme.那是因为他没有理解我。那是因为他没有理解我。(Thatsbecause.强调原因强调原因)Thatswhyhegotangrywithme.那正是他对我生气的原因。那正是他对我生气的原因。(Thatswhy.强调结果强调结果)reason作主语时，后面的表语从作主语时，后面的表语从句表示原因时要用句表示原因时要用that引导，不引导，不宜用宜用because。ThereasonwhyIwassadwasthathedidntunderstandme.我难过的原因是他没有理解我。我难过的原因是他没有理解我。4.连接代词连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词连接副词where,when,how,why。如：Theproblemiswhowecangettoreplaceher.问题是我们能找到谁去替换她呢。问题是我们能找到谁去替换她呢。Thequestionishowhedidit.问题是他是如何做此事的。问题是他是如何做此事的。Thatwaswhatshedidthismorningonreachingtheattic.那就是她今晨上了阁楼干的。那就是她今晨上了阁楼干的。5.从属连词从属连词that。that在表语从在表语从句中不充当任何句子成分，也没有句中不充当任何句子成分，也没有任何意义。任何意义。如：ThetroubleisthatIhavelosthisaddress.麻烦是我把他的地址丢了。麻烦是我把他的地址丢了。6.使用虚拟语气的表语从句使用虚拟语气的表语从句在表示建议、劝告、命令含义的名词后的在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用表语从句，谓语动词需用should+动词原动词原形形表示，表示，should可省略可省略。常见的词有：。常见的词有：advice,suggestion,order,proposal,plan,idea等。等。Mysuggestionisthatwe(should)startearlytomorrow.我的建议是我们明天一早就出发。我的建议是我们明天一早就出发。四、应注意的问题：四、应注意的问题：1.连系动词连系动词be，appear，seem，look等之后可以跟表语从句。等之后可以跟表语从句。Itwasbecausehedidntpasstheexam.Itseems（that）hewaslateforthetrain.2.2.引导表语从句的引导词有以引导表语从句的引导词有以下几类。下几类。1）wh-疑问词疑问词Myquestioniswholeft.我想问的是谁离开了。我想问的是谁离开了。WhatIwonderiswhenheleft.我想知道他是何时离开的。我想知道他是何时离开的。2）whetherMyquestioniswhetherheleft（ornot）.我的问题是他我的问题是他是否离开了。是否离开了。注：注：ifif不能引导表语从句。不能引导表语从句。3）thatThefactisthatheleft.事实是他事实是他离开了。离开了。ThetruthisthatIdidntgothere.事实是我没去那儿。事实是我没去那儿。4）because，as，asif，asthoughItsjustbecausehedoesntknowher.这是仅仅因为他不认这是仅仅因为他不认识她。识她。Thingsarenotalwaysastheyseemtobe.事物并不总是事物并不总是如其表象。如其表象。Helooksasifhestired.他好他好像累了。像累了。特殊用法:1.because 引导的表语从句.的结构.2.as if/as though引导的表语从句常在连系 动词 look ,seem,sound,be,become 后面.My anger is because you havnt finish your homework.It seemed as if the brothers were playing a joke on Henrry.试区分以下句子试区分以下句子Isthismuseumwhatyouvisited?Isthisthemuseumthatyouvisited?Isthismuseumtheonethatyouvisited?注意：这种句子考试时一定要记住这句话：名注意：这种句子考试时一定要记住这句话：名词前（尤其是单数可数名词前）一定要有限定词前（尤其是单数可数名词前）一定要有限定词。然后把句子变换成陈述句，接着判断句子词。然后把句子变换成陈述句，接着判断句子是属于哪种从句再完成。是属于哪种从句再完成。(表从表从)(定从定从)(定从定从)1.Thequestionis_wewillhaveoursportsmeetnextweek.A.thatB.ifC.whenD.whether2Thereasonwhyhefailedis_hewastoocareless.A.becauseB.thatC.forD.becauseof3.Goandgetyourcoat.Its_youleftitAwhereB.thereC.therewhereD.wherethere4Theproblemis_totaketheplaceofTedA.whocanwegetB.whatwecangetC.whowecangetD.thatwecanget5.WhatIwanttoknowis_helikesthegiftgivenbyus.A.thatB.ifC.whetherD.不填6.Thereasonis_Imissedthebus.A.thatB.whenC.whyD.what7.Thatis_wewerelatelasttime.A.thatB.whenC.whyD.what8.Shelooked_sheweretenyearsyounger.A.thatB.likeC.asD.asthough9.Ifellsick!-Ithinkitis_youaredoingtoomuch.A.whyB.whenC.whatD.because10.Thereasonwhyhehasntcomeis_.AbecausehismotherisillBbecauseofhismothersbeingillC.thathismotherisillD.forhismotherisill11.Hewasbornhere.-Thatis_helikestheplacesomuch.A.thatB.whatC.whyD.how12.Thatis_LuXunoncelived.A.whatB.whereC.thatD.whythat/what的区别的区别1_yourfatherwantstoknowis_gettingonwithyourstudies.A.What;howareyouB.That；howyouareC.How；thatyouareD.What；howyouare2.Thetroubleis_weareshortoftools.A.whatB.thatC.howD.whythat3.Americawas_wasfirstcalled“India”byColumbus.A.whatB.whereC.theplaceD.therewhere1.Pleasetellmeyouwillgototheleacturetomorrow.2.Italldependsontheskywillclearup.3.Thequestionisthefilmiswellworthseeing.4.HewillbewelltomorrowIamnotsure.5.itistrueremainsaproblem.关联词比较whether/ifwhether/ifwhetherwhetherwhetherwhetherA.引导宾语从句时可互换.B.位于介词后要用whether.C.位于句首时要用whether.D.引导表语从句,主语从句,同位语从句时,要用whether.