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1、表语从句表语结构：放在系动词之后作用：说明主语的身份、性质、品性、特征和状态的成分：表语常由名词、形容词、副词、介词短语、不定式、动词的-ing、从句来充当。1.ThisisanEnglish-Chinesedictionary.2.Thedinnersmellsgood.3.Hefellinlove.4.MyjobistoteachyouEnglish.5.Thequestioniswhowilldoit.表语从句主语+系动词+引导词+其他成分Thisiswhyhedidit.分析：WhatIwan
2、ttosayisthatIamtired.可以接表语从句的系动词有：1:be动词2:感官动词：feel,seem,look,appear,sound,taste,smell3:表示状态：remain,keep,stay4:表示变化：become,get,grow,turn,go,fall5:证明：prove,turnout系动词的固定搭配:cometrue,fallasleep,fallill,gobad连接词：that/whether/asif/asthough连接代词：who/whom/whose
3、/which/what连接副词：when/where/why/how/because引导词thatThefactisthatourteamhaswonthegame.1）that在从句中不担任句子成分，无实际意义，一般不能省略2)主语是“建议，劝说，命令”的名词，如idea,suggestion,proposal,order,request,表语从句中谓语动词用“should+动词原形”，should可省略我的建议是我们明天早点离开。Mysuggestionisthatwe(should)leavee
4、arlytomorrow.连接词：that/whether/asif/asthoughWhether是否Thequestioniswhetheritisworthdoing.注意：if不能引导表语从句连接词：that/whether/asif/asthoughasif,asthough好像，似乎常置于连系动词look,seem,sound,is,become等后面It+连系动词（look/seem/appear……）+that/asif从句看起来似乎…他似乎知道所有事情。Itseemsasifhekn
5、owseverything.连接词：that/whether/asif/asthoughItsoundsasif/thoughsomebodywasknockingatthedoor.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Itlooksasifhewereherownfather.(与事实不符)Itlooksasifsheisworriedaboutherfather’sdisease.(与事实相符)Itlooksasifit’sgoingtor
6、ain.Itwasasthoughheweremad.连接词：that/whether/asif/asthough精典名题When a pencil is partly in a glass of water, it looks as if it _______.A.breaks B.has brokenC.were broken D.had been brokenbecause因为引导表语从句通常只用于“This/That/Itisbecause…”结构中。我昨天没有去上班，是因为我生病了。Idid
7、n’tgotoworkyesterday.That’sbecauseIwasill.why…的原因Ididn’tdomyhomework,that’swhyIwaspunishedbymyfather.WHY与BECAUSE引导表语从句时的区别why前者强调结果，because后者强调原因。Hewasill.That’swhyhewassenttothehospital.Hewassenttothehospital.That’sbecausehewasill.例题2：Thereasonwhyhefai
8、ledis________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.句型：thereason(why…)isthat….我不说话的是因为我害羞。ThereasonwhyIdon'tspeakisthatI'mshy.Theproblemiswhocanhelpher.Thequestionishowhemadeit.
