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(1)表语从句1.定义:用作表语的从句叫做表语从句。2.构成:关联词+简单句3.引导表语从句的关联词的种类:(1)从属连词that。如:ThetroubleisthatIhavelosthisaddress.麻烦是我把他的地址丢了。(2)从属连词whether,as,asif。如:Helookedjustashehadlookedtenyearsbefore.他看起来还与十年前一样。Thequestioniswhethertheywillbeabletohelpus.问题是他们是否能帮我们。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,如:Allthiswasovertwentyyearsago,butit'sasifitwasonlyyesterday.这都是20多年前的事了,但宛如昨天一样。能跟表语从句的谓语动词一般为系动词be,seem,look等。如:Itlookedasifitwasgoingtorain.看起来天要下雨了。(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词where,when,how,why。如:Theproblemiswhowecangettoreplaceher.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。Thatwaswhatshedidthismorningonreachingtheattic.那就是她今晨上了阁楼干的。解释:1.连词because可引导表语从句。如:Ithinkitisbecauseyouaredoingtoomuch.我想这是因为你做得太多。2.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。如:Mysuggestionisthatwe(should)startearlytomorrow.我的建议是我们明天一早就出发。(2)主语从句1.定义:用作主语的从句叫做主语从句。2.构成:关联词+简单句3.引导主语从句的关联词有三类:(1)从属连词that。如:Thattheywereintruthsisterswasclearfromthefacialresemblancebetweenthem.很明显,她们确是亲姐妹,她们的脸型很相似。(2)从属连词whether。如:Whetherhe’llcomehereisn’tclear.他是否会来这里还不清楚。(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词where,when,how,why。如:Whatshedidisnotyetknown.她干了什么尚不清楚。Howthishappenedisnotcleartoanyone.这事怎样发生的,谁也不清楚。Whoevercomesiswelcome.不论谁来都欢迎。Whereveryouareismyhome----myonlyhome.你所在的任何地方就是我的家----我唯一的家。解释:1.主语从句能用it作形式上的主语。常以it作形式主语的句型有:A.It+be+形容词(obvious,true,natural,surprising,good,wonderful,funny,possible,likely,certain,probable,etc.)+that从句。如:Itiscertainthatshewilldowellinherexam.毫无疑问她考试成绩会很好。Itisprobablethathetoldhereverything.很可能他把一切都告诉她了。B.It+be+名词词组(nowonder,anhonour,agoodthing,apity,nosurprise,etc.)+that从句。如:It’sapitythatwecan’tgo.很遗憾我们不能去。It’snosurprisethatourteamshouldhavewonthegame.我们没赢这场比赛真意外。C.It+be+过去分词(said,reported,thought,expected,decided,announced,arranged,etc.)+that从句。如:ItissaidthatMr.GreenhasarrivedinBeijing.据说格林先生已经到了北京。ItisreportedthatChinahassentanotherman-madeearthsatelliteintoorbit.据报道中国又成功地发射了一颗人造地球卫星。D.It+seem,happen等不及物动词及短语+that从句。如:ItseemsthatAliceisnotcomingtothepartyatall.Alice似乎不来参加晚会。IthappenedthatIwasoutthatday.碰巧我那天外出了。E.It+doesn’tmatter(makesnodifference,etc.)+连接代词或连接副词引起的主语从句。如:Itdoesn’tmatterwhethershewillcomeornot.她是否来这无关紧要。Itmakesnodifferencewhereweshallhavethemeeting.我们在哪里开会毫无区别。F.当that引导的主语从句出现在疑问句中时,要以it作形式主语,而把主语从句后置。如:Isittruethatthescientistwillgiveusalecturenextweek?下周那位科学家将给我们作报告是真的吗?Doesitmattermuchthattheywillnotcometomorrow?他们明天不来很要紧吗?G.当主语从句出现在感叹句中时,要以it作形式主语,而把主语从句后置。如:Howstrangeitisthatthechildrenaresoquiet!孩子们这么安静真奇怪!2.注意连接代词whoever,whatever,whichever等引导主语从句的含义Whoevercomeswillbewelcome.(whoever=thepersonwho)来的人将受到欢迎。Whateverhedidwasright.(whatever=thethingthat)他所做的事情是正确的。Whicheverofyoucomesinwillreceiveaprize.(whichever=anyoneofyouwho)你们当中不论哪个进来将会得到奖(3)宾语从句1.定义:用作宾语的从句叫宾语从句。2.构成:关联词+简单句3.引导宾语从句的关联词有三类:(1)从属连词that。如:Hetoldusthathefeltill.他对我们说他感到不舒服。Iknowhehasreturned.我知道他已经回来了。注:that在引导宾语从句时也并不是任何情况下都可以省略。在以下情况下,that不能省略。1.EverybodycouldseewhathappenedandthatTomwasfrightened.(and连接两个宾语从句,that宾语从句放在and的后面时,that不能省略。)大家都会看出所发生的事情并知道Tom非常害怕。2.Iknownothingabouthimexceptthatheisfromthesouth.(that引导的宾语从句作介词宾语时,that不能省略。)对他我一无所知,只知道他是南方人。3.ThatheeversaidsuchathingIsimplydon’tbelieve.(that从句位于句首时,that不可省略。)我简直不相信他曾说过这样的话。4.Wedecided,inviewofhisspecialcircumstances,thatwewouldadmithimforaprobationaryperiod.(主句谓语动词与that从句之间有插入语,that不可省略。)鉴于他的特殊情况,我们决定应允他一段试用期。(2)从属连词if/whether。如:Idoubtwhetherhewillsucceed.我怀疑他是否会成功。Idon’tknowifyoucanhelpme.我不知道你能否帮助我。(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词where,when,how,why。如:Whoorwhathewas,Martinneverlearned.他是什么人?他是干什么的?马丁根本不知道。Iwonderwhathe’swritingtomeabout.我不知道他要给我写信说什么事。I’lltellyouwhyIaskedyoutocome.我会告诉你我为什么要你来。Youmaydowhatyouwill.你可做任何你想做的事。(1)介词宾语从句宾语从句也可用作介词的宾语。如:Hewasdeeplydispleasedbywhathadoccurredthatday.他对那天发生的事感到很不快。Iwalkedovertowhereshesat.我走向她坐的地方。Iamcuriousastowhathewillsay.我很想知道他要说什么。Yoursuccesswilllargelydependuponwhatyoudoandhowyoudoit.你是否成功将主要取决于你做什么和怎样做。有时介词可以省略。如:Idon’tcare(for)whomarrieshim.我不管谁跟他结婚。Becareful(asto)howyoudothat.你要注意做这件事的方式。解释:1.如果宾语从句后还有宾语补足语,则用it作形式宾语,而将宾语从句后置。如:WethoughtitstrangethatXiaoWangdidnotcomeyesterday.我们认为小王昨天没来是奇怪的。Hehasmadeitclearthathewillnotgivein.他已表明他不会屈服。2.作介词的宾语:连词that引导的名词性从句很少作介词的宾语,只用在except,but,in后。其他一些介词的宾语从句如果由连词that引导,则需用it先行一步,作形式宾语。如:Heisagoodstudentexceptthatheiscareless.他是一个好学生,只是有点粗心。YoumayrelyonitthatIshallhelpyou.你可以指望我会帮助你的。介词宾语不可以用which来引导,而要用what来引导。如:Areyousorryforwhatyou'vedone?你为你所做的一切感到内疚吗?3.某些形容词或过去分词后常接宾语从句,这类形容词或过去分词有sure,glad,certain,pleased,happy,afraid,surprised,satisfied等,连词that可省略。如:IamnotsurewhatIoughttodo.我不能确定我该做什么。I'mafraidyoudon'tunderstandwhatIsaid.恐怕你没领会我说的意思。I'msurprisedthatIdidn'tseeallthatbefore.我好奇怪,我以前没看到过。Motherwasverypleasedherdaughterhadpassedtheexams.妈妈为她的女儿通过了考试而感到高兴。4.连词whether(…ornot)或if引导的宾语从句if和whether引导的宾语从句可以互换使用,但whether常和ornot连用,if一般不与ornot连用。如:Iwonderwhetheritistrueornot.我不知它是真是假。用if引导宾语从句如果会引起歧义,应避免使用if而用wheter。试比较:Pleaseletmeknowifyouwanttogo.Pleaseletmeknowwhetheryouwantt
本文标题:高二英语语法总结
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