U3 grammar之表语从句

Grammar表语从句一、表语从句的定义：Theproblemiswhocaresaboutit.系动词表语在复合句中充当表语的从句。Theproblemisclear.表语从句系动词（LinkVerb）本身有词义，但不能单独作谓语，后必须跟表语，构成系表结构说明主语的状况、性质、特征等情况。你看起来好像仍然感觉到持续的变化状态系动词主要有：•看起来好像仍然：seem,appear,look,remain,•感觉：feel,smell,sound•持续:keep,stay,stand•状态:be(amisare)•变化:become,grow,turn二、表语从句的构成：（系动词）+引导词+简单句WhatIwanttosayisthatIamtired引导词表语从句Thequestionremainswhethertheywillbeabletohelpus.问题还是他们能否帮我们。三、引导表语从句的关联词的种类：1.从属连词whether,as,asif/though引导的表语从句听起来好像有人在敲门。Helookedjustashehadlookedtenyearsbefore.他看起来还与十年前一样。Itsoundsasifsomeoneisknockingatthedoor.2.because,why引导的表语从句That's__hedidn'tunderstandme.That'shedidn'tunderstandme.那是他为什么不理解我的原因。那是因为他没有理解我。becausewhy4.连接代词who,whom,whose,what,which连接副词where,when,how,whyTheproblemis____wecangettoreplaceher.Thequestionis____hedidit.Thatwas_____shesaidthismorning.问题是我们能找到谁去替换她呢。问题是他是如何做此事的。那就是她今天早上所说的。whohowwhatChinaisnolonger______sheusedtobe.今日的中国不再是过去的中国了。what1从属连词that不可以省掉。2、不可以用if，而用whether连接表语从句(asif例外）。ThefactisthatIearnedmypassagebyworkingasanunpaidhand.Theproblemiswhetherhewillcomeback.注意:一些引导词的用法（一）that在表语从句中,。Thefactisthathehasn’tyetrecoverfromillness.Thereasonwhyhehastogoisthathismotherisillinbed.既不充当成分没有意义比较在定语从句中的用法。TherearesomefilmsthatI’dliketosee.SheistheonlyoneamongusthatknowsFrench.结论:that在引导定语从句时,指事物,也可指人,在从句中作主语或宾语,作宾语时常可省略。一些引导词的用法（五）•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:Whatthedoctorreallydoubtsiswhethershewillrecoverfromtheseriousdiseasesoon“是否”不能1.LiLeiisnowinanewjacket.HelooksasifhewereanAmericanboy.2.Thegirlisgivingusavividdescriptionofthemoon.Itseemsasifshehadbeentothemoonmanytimes.3.Itlooksasifitmightrain.4.Thecloudsaregathering.itlooksasifitisgoingtorain.一些引导词的用法（六）由asif,asthough引导表语从句时要注意语态.若从句表示与现在事实相反,谓动用,与过去事实相反用或表示将来的可能性不大，则用.一般过去式（be用were）had+p.p.Would(might,could)+v原一些引导词的用法(二）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）另：what不引导定语从句一些引导词的用法（三）Which在引导表语从句时,常充当_____________表示。如：Ireadaboutitinsomebookoranother,butwhatIdon’tknowiswhich(book)itis.比较在定语从句中的用法。Chinaisacountrywhichhasahistoryof2000years.Adictionaryisabookwhichgivesthemeaningofwords.定语,表语其中哪一个结论:which在引导定语从句时,指事物,在从句中作主语或宾语,作宾语时常可省略当主句的主语为reason,或者是由why引导的从句时,表语从句用_________,而不能由_______引导;because引导表语从句时只能用于___________________________句型中.如:ThereasonwhyIwaslatewasthatImissedthetrain.Iwaslate.It/That/ThiswasbecauseImissedthetrain.that来引导becauseIt/That/Thisis/wasbecause…That'swhywe'vegivenyoutheletter.一些引导词的用法(四)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.—Ifellsick!--Ithinkitis_______youaredoingtoomuch.A.whyB.whenC.whatD.because9.—Hewasbornhere.--Thatis_______helikestheplacesomuch.A.thatB.whatC.whyD.how10.Thatis______LuXunoncelived.A.whatB.whereC.thatD.why