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ThePredicativeClause表语从句Definition•在复合句中起名词作用的从句叫做名词性从句。它包括主语从句、宾语从句、表语从句和同位语从句。•Thattheearthturnsaroundthesunisknowntoall.•Iwanttoknowwhether(if)hehaspassedthechemistry.•Thetroubleisthathehasneverdonetheworkbefore.Thenewsthattheplanewouldtakeoffontimemadeeverybodyhappy.主语从句宾语从句表语从句同位语从句在复合句中做表语的从句，叫做表语从句。它位于主句的系动词am,is,are,was,were,seem,look,taste,remain等之后，对主语进行解释，说明，使主语的内容具体化。Thequestioniswhowilldoit.表语从句放在连系动词之后，充当复合句中的表语。Thequestioniswhowilldoit.Thequestionisdifficult.（表）表语从句（表）可接表语从句的系动词有：1.be2.feel,seem,look,appear,sound,taste,smell3.stand,lie,remain,keep,stay4.become,get,grow,turn,go,come,run,fall5.prove,turnout1.这个故事听起来像是真的。Thestorysoundstrue.2.他似乎知道这件事。Heappearstoknowthis.例句：3.这些桔子很好吃。Theseorangestastegood.1.ThisisanEnglish-Chinesedictionary.2.Thedinnersmellsgood.3.Hefellinlove.4.MyjobistoteachyouEnglish.5.Thequestioniswhowilldoit.2.表语从句的构成主语+系动词+引导词+简单句Thisiswhyhedidit.表语从句放在连系动词之后，充当复合句中的表语。Hissuggestionisthatweshouldstaycalm.Thatiswhyshewaslate.引导词引导词（系动词）+引导词+简单句（主语）+WhatIwanttosayisthatIamtired主语+系动词+引导词+简单句观察思考：指出句子成分HenrywasanAmericanbusinessman.HenrymetanAmericanbusinessman.主语表语主语谓语宾语（及物动词）连系动词1.从属连词as,asif/though引导的表语从句Helookedjustashehadlookedtenyearsbefore.Itsoundsasifsomeoneisknockingatthedoor.他看起来还与十年前一样。听起来好像有人在敲门。引导词的用法（一）asif/though引导的表语从句常置于连系动词look,seem,sound,be,become等后面，常用虚拟语气，表示不存在的动作或状态。e.g.Itsoundsasif/thoughsomebodywasknockingatthedoor.主语+连系动词（look/seem/appear…）+that/asif从句asif,asthough引导的表语从句•*asif/asthough引导的表语从句如果是事实，就用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时，be变成were。主句是一般过去时，从句用过去完成时)。•Itlooksasifhewereherownfather.(与事实不符)•Darkcloudsaregathering.Itlooksasifit’sgoingtorain.becausebecause引导表语从句通常用于“This/That/Itisbecause…”结构中。而且主语一般不用reason。Myangerisbecauseyouhaven’twrittentomeforalongtime.Whywereyouabsentfromthemeeting?Wasitbecauseyouwereill?你为什么不来出席座谈会？是病了么？引导词的用法（二）that,why与because引导表语从句时的区别•三者均可引导表语从句，但that没有词义，而why和because有自己的意思；另外，前者强调结果，后者强调原因。如：•Thereasonwasthatyoudon’ttrusther.原因是你不信任她。•Thefactisthattheyareangrywitheachother.事实是他们生彼此的气。•Hewasill.That’swhyhewassenttothehospital.他病了，所以被送到医院来。•Hewassenttothehospital.That’sbecausehewasill.他被送到医院，是因为他生病了。例句：(1)That’sbecausehedidn’tunderstandme.(2)That’swhyhegotangrywithme.那是因为他不理解我。那正是他对我生气的原因。(强调原因）（强调结果）连接代词who,whom,whose,whoever,what,whatever,which,whichever,连接副词where,when,how(1)Theproblemiswhowecangettoreplaceher.(2)Thequestionishowhedidit.(3)Thatiswherehewasborn.问题是我们能找到谁去替换她呢。问题是他如何做此事的。那就是他出生的地方。where,when,why,how引导的表语从句连接副词where,when,why,how除在句中起连接作用外，在从句中还充当时间、地点、方式、原因状语，本身具有词义。That’swhereIcan’tagreewithyou.ThisiswhySarawaslateforthemeeting.Thisishowtheyovercomethedifficulties.MystrongestmemoryiswhenIattendedanAmericanwedding.what在表语从句中充当______________表示____________________________.1.Thequestioniswhatcausedtheaccident.2.Thatmountainisnolongerwhatitusedtobe.3.Whathetoldyouwaswhathadbeendiscussedatthemeeting.主语、宾语或表语什么，什么样子，或所…的（人或事）引导词的用法（三）who在表语从句中充当______________表示____.1.Theproblemiswhocoulddothework2.Mytroubleiswho(whom)Icanturnto.主语、宾语或表语谁引导词的用法（四）which在引导表语从句时,常充当_____________表示。如：Ireadaboutitinsomebookoranother,butwhatIdon’tknowiswhich(book)itis.定语,表语其中哪一个引导词的用法（五）1.that1)that在从句中不担任句子成分，无实际意义，一般不能省略2)在表“建议，劝说，命令”的名词idea,suggestion,request,proposal等后面的表语从句中，谓语动词用“should+动词原形”（虚拟语气），should可省略1)Myopinionisthatit’sgettingbetterandbetter.2)Mysuggesstionisthatwe(should)startearlytomorrow.引导词的用法（一）名词主语+be+that引起的表语从句主语名词常常是表示事实，真理的名词，如：fact,truth表示看法，观点、问题、麻烦的名词，如：idea,opinion,belief,view,news,advice,feeling,suggestion,plan,trouble,question,problem,1.Thefactisthatourteamhaswonthegame.2.Thetruthisthatshewastheverypersonwearelookingfor.填空:Thereasonwhywedidn'ttrusthimis______hehasoftenlied．reason做主语时，表语从句只能用that引导,不能用why引导。句型结构为：Thereason(why…/for…)is/wasthat….Thereasonisthat……thatThereasonwhyhewaslatewasthathemissedthetrainbyoneminutethismorning（当主语是reason时，表语从句要用that引导而不是because）他早上来晚的原因是他晚了一分钟而没赶上火车。whether在表语从句中表,但不充当句子的成分。if引导表语从句.如:1.Whatthedoctorreallydoubtsiswhethermymotherwillrecoverfromtheseriousdiseasesoon.2.Thequestioniswhetheritisworthdoing.“是否”不能引导词的用法（五）四.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表语从句，谓语动词需用should+动词原形表示，should可省略。常见的词有：advice,suggestion,order,proposal,plan等。Mysuggestionisthatwe(should)startearlytomorrow.表语从句引导词注意事项1.that引导表语从句时不能省.2.if不能引导表语从句.3.除that外的所有引导词都有自己的意义。4.除that,whether外的所有引导词都须在从句中充当相应的成分5.表语从句中，从句用陈述句语序小结：1.表语从句的构成:引导词+简单句2.引导词:｛连词that,whether,as,asif连接代词who,what,which连接副词when,where,how,why3.3个注意点:①if不引导表语从句②主语为reason时，引导词用that③语序例题1：Thequestionis________wewillhaveoursportsmeetingnextweek.A.thatB.ifC.whenD.whetherD注意点1：if不能引导表语从句例题2：Thereasonwhyhefailedis________hewastoocareless.A.becauseB.thatC.forD.becauseofB注意点2：主句主语为reason,只能用that引导表语从句，不可用because.用because,that,why填空1、Thereasonwas______theheavyrainpreventedhimfromcoming.2、Thereason________wedidn’ttrusthimisthathehasoftenlied.3、Itis_______hehasoftenlied，sothatwedidn’ttrusthim.注意点3：reason后的定语从句可以用why/that引导，because一般用于it/this/that+从句句型中。thatwhybecause注意点4：如果从句是特殊疑问句，用陈述句语序Theproblemis_________totaketheplaceofJohn.A.whocanwegetB.wh