搜索
表语从用法1.定义：用作表语的从句叫做表语从句2.引导表语的从句的关联词的种类（1）从属连词that.ThetroubleisthatIhavelosthisaddress.Thereasonwasthathewaslateforschool.(2)从属连词whether,as,asifHelookedjustashehadlookedtenyearsbefore.Thequestioniswhethertheywillbeabletohelpus.注：从属连词if一般不用来引导表语从句，但asif却可引导表语从句。Allthiswasovertwentyyearsago,butit’sasifitwasonlyyesterday.Thekeyiswhetherwecansolvetheproblem.Itlookedasifitwasgoingtorain.注：能跟表语从句的谓语动词一般为系动词be,seem,look,sound等Helookedjustashehadlookedtenyearsbefore.Itsoundsasifsomeoneisknockingatthedoor.(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever在表语从句中做主语、宾语等。Theproblemiswhowecangettoreplaceher.Thatwaswhatshedidthismorningonreachingtheagreement.Myquestioniswholeft.(4)连接副词where,when,how,whyWhatIwonderiswhenheleft.Thisiswheretheyoncelived.Thatiswhyhedidn’tcomehere.Thequestionishowhedidit.(5)连词because可引导表语从句。注意：because可引导表语从句，但与之同义的since,as,for等不用于引导表语从句。Ithinkitisbecauseyouaredoingtoomuch.It’sjustbecausehedoesn’tknowher.That’sbecausehedidn’tunderstandme.(That’sbecause…强调原因)That'swhyhegotangrywithme.(That’swhy…强调结果)注意：在一些表示“建议，劝说，命令”的名词后面的表语从句中，谓语动词用虚拟语气.Should+动词原形表示，should可省略。Mysuggestionisthatwe(should)startearlytomorrow.一坚持（insisit）二命令（command,order）三建议（suggest,advise,propose）四要求（desire,demand,require,request）四．注意事项（重点看）1.表语从句要用陈述语序。Thatiswherethefamousscientistwasborn.Thisiswhysheissohappytoday.2.that和what在引导的表语从句that本身没有词义，在句中只起连接作用，不充当句子成分；what则表示“所…的（人或事）”，在表语从句中充当主语或宾语等。Thatfacetisthatmorethanseventypercentoftheearth’ssurfaceiscoveredbywater.Whathetoldyouwaswhathadbeendiscussedatthemeeting.3.if与whether均意为“是否”引导的表语从句是，只能用whether，不能用if。Thequestioniswhetherwecanfinishourworkbytomorrowevening.4.语气（1）主语为advice,order,idea,notion,proposal,suggestion,request等一些表示“建议，劝说，命令”的名词，之后的表语从句中，谓语动词用虚拟语气。Should+动词原形表示，should可省略。Mysuggestionisthatwe(should)startearlytomorrow.Ouronlyrequestisthatthisshouldbesettledassoonaspossible.(2)asif/though引导的表语从句时，从句谓语多用虚拟语气。这是因为从句中的情况与事实不相符。具体来说，如果从句表示与现在事实相反，谓语动词用一般过去式；如果从句表示与过去事实相反，谓语动词“had+done”,如果从句表示将来的可能性不大，用would(might,could)+动词原形。LiLeiisnowinanewjackethelooksasifhewereanAmericanboy.Thegirlisgivingusavividdescriptionofthemoon.Itseemsasifshehadbeentothemoonmanytimes.但是，如果asif,asthough引导的表语从句所表示的与事实相符，从句则用陈述语气。Thecloudsaregathering.Itlooksasifitisgoingtorain.5.时态不像宾语从句，在有表语从句的复合句中，主语时态和从句时态可以不一致。ThequestioniswhowilltravelwithmetoBeijingtomorrow.Thequestioniswhyhecriedyesterday.系动词分类：一．根据系动词后所跟结构，我们可以把英语系动词分为两大类：完全系动词（其后只能跟表语动词，如be,seem）和半系动词（其后既跟表语作系动词用法，也可以跟宾语或状语作实义动词用，如look）1)Helookedsadlyattheboy.(看着，实义动词用法)Helooksacleverboy.(看起来，系动词用法)2）Helooksatacleverboy.(看着，实义动词用法)在英语中，某一动词是多义词，既有实义动词用法，又有系动词用法。二．根据系动词的意义，我们把英语系动词分为四类：A．五大感官系动词B.状态系动词C.动态系动词D.双谓语系动词1.look“看起来像是“，后接adj,n.分词，介词短语，不定式等。Thegirlbitherlipsandlookedthoughtful.2.Smell“听起来”，后接adj,分词。Theflowersmellsweet.3.sound“听起来“，后接adj,分词。Themusicsoundssweet.4.taste“尝起来“，后接adj,分词。Theapplestasteverygood.5.feel①“摸起来，给….感觉”；②“觉得”，后接adj,p.pYouwillfeelbetterafteranight’ssleep.B.状态系动词：1.be,“是“，属完全系动词。Iamastudent.2.seem,“似乎，好像“，完全系动词。Theyseemquitehappy.3.appear,“显得，看起来好像”，半系动词。Itappeared(tobe)atruestory.4.keep,“保持…的状”，半系动词，后接adj或介词短语。You’dbettergotobedandkeepwarm.5.remain,“仍是”，半系动词。Iremainedsilent.6.stay“保持(某种状态)”,半系动词,后接adj,过去分词。Thewindowstayedopenallthenight.7.prove“证明是”，半系动词，后接adj,nThetreatmentprovedtobesucessful.C.动态系动词：都属于半系动词，描述状态变化过程。1.get“变成，变得……起来”,后接形容那个词，分词，介词短语。Thedaysaregettinglongerandlonger.2.fall“进入（某种状态），成为“，后接以下形容词：asleep,lame,silent,ill,sick,flat.Theoldmen,unabletoexpresshimself,fellsilent.Myfatherfellillanddied.3.grow“渐渐变得…..起来，长得”It’sgrowingwarm.4.turn“转变成（新的与原来完全不同的色彩或性质），变质（色）”。Mapletreesturnredinautumn.Itwascloudythismorning,butfortunatelyithasturnedfien.5.go,“变成（某种坏的状态）”Thetelephonehasgonedead.Thematerialhasgoneafunnycolour.Go之后常接adj.还有：bad,blind,wild,wrong,sour,hard,hungry,mad,red,with,anger,white,pale,blue,grey6.become”变成，成为（好坏均可的情况）”Ibecameinterestedindrawing.Hebecameangrywithme.Theybecamegoodfriends.7.come,“变成为（已知的状态），证实为”，后接形容词或前缀un-的过去分词作表语，表示状态或情况的变化。Hiswishtobecomeapilothascometrue.后面接的形容词还有apart,dear,natural,open,short,right,unstuck,untied.8.run“变成”，后接adj.Thepriceranhigh.9.make,“达到某种状态，后接形容词，如：sure,certain,merry,bold,free.Wemustmakecertainoffacts.D．双谓语系动词此类系动词既有系动词功能，后接表语，又保留原实义动词本身的含义。Thesunrosered.Shestoppedandstoodquitestill.Thesnowlaythickontheground.Hemarriedyoung.LeiFengdiedyoung.Hecontinuedsilent.表语从句练习1.Thequestionis________wewillhaveoursportsmeetnextweek.A.thatB.ifC.whenD.whether2．Thereasonwhyhefailedis________hewastoocareless.A.becauseB.thatC.forD.becauseof3.Goandgetyourcoat.It’s________youleftitA.whereB.thereC.therewhereD.wherethere4．Theproblemis_________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.Thereasonwhyhehasn’tcomei