教育专题:名词性从句2.ppt
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1、主语从句是在复合句中充当主语的从句,通常放在主句主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语谓语动词之前或由形式主语it代替,而本身放在句子末代替,而本身放在句子末尾。尾。How the book will sell depends on its author.That he is the best student in the class is obvious.主语从句引导主语从句的关联词有三类:引导主语从句的关联词有三类:(1)从属连词从属连词that。如:如:That they were true sisters was clear from the faci
2、al resemblance between them.很明显,她们确是亲姐妹,她们的脸型很相似。很明显,她们确是亲姐妹,她们的脸型很相似。(2)从属连词从属连词whether。如:如:Whether hell come here isnt clear.他是否会来这里还不清楚。他是否会来这里还不清楚。(3)连接代词连接代词who,whom,whose,what,which,whoever,whatever,whichever连接副词连接副词 where,when,how,why。如:如:What she did is not yet known.她干了什么尚不清楚。她干了什么尚不清楚。How
3、this happened is not clear to anyone.这事怎样发生的,谁也不清楚。这事怎样发生的,谁也不清楚。Whoever comes is welcome.不论谁来都欢迎。不论谁来都欢迎。主语从句三要素主语从句三要素 he became a great scientist is known to us all.Is what you told me really true?谓谓语语动动词词用用单单数数从从句句用用陈陈述述语语序序不不能能省省略略关关联联词词注意注意:What we need most are books.How一一.主语从句的连接词主语从句的连接词1.t
4、hat 1.that 只起引导作用,本身无实际意义,不充只起引导作用,本身无实际意义,不充当任何成分,但当任何成分,但不能省略不能省略不能省略不能省略。ThatThat she left him she left him made him heart-broken.made him heart-broken.ThatThat he is still alive he is still alive is a good news to us.is a good news to us.我们保持平衡饮食有益健康。我们保持平衡饮食有益健康。2.2.置于句首只能用置于句首只能用whether“whethe
5、r“是否是否”,不充当从句,不充当从句的任何成分。的任何成分。他是否会参加这个话剧表演是显而易见的他是否会参加这个话剧表演是显而易见的_ is clear._ is clear._(_(他能否买到飞机票他能否买到飞机票)doesnt matter much.doesnt matter much.Whether he can buy the plane ticketsWhether he can buy the plane ticketsWhether hell take part in the playWhether hell take part in the playThat we keep
6、 a balanced diet is good for our health.we keep a balanced diet is good for our health.3 3 whwh-疑问词包含意思,并在从句中充当成分。疑问词包含意思,并在从句中充当成分。_ she will be back is still a question._ she will be back is still a question._ you told me just now was really a surprise._ you told me just now was really a surprise.
7、_ we will hold the basketball game tomorrow is _ we will hold the basketball game tomorrow is not important.not important._ class will win the football game is not clear._ class will win the football game is not clear._ will meet him is not decided._ will meet him is not decided.WhenWhenWhatWhatWher
8、eWhereWhich Which WhoWho_ breaks the law should be punished._ breaks the law should be punished._ has helped to save the drowning girl is worth_ has helped to save the drowning girl is worthpraising.praising._ tells lies is wrong_ tells lies is wrongWhoeverWhoeverWhoeverWhoeverWhoeverWhoever1._ will
9、 win the gold medal remains to be seen.2._ wants to ask questions is welcome any time.3.The manager decided to offer the job to _ he believed had a strong sense of duty.WhoWhoWhoeverwhoeverwhoeverWho/whoever/whomever4._ you choose as your wife has nothing to do with me.5._ breaks the law should be p
10、unished.6.There is no doubt that anyone _ doesnt give in to difficulties will be successful at last.WhomeverWhomeverWhoeverWhoeverwhowho1)_yousaidyesterdayisright.2)_sheisstillaliveisaconsolation(安慰)(安慰).3)_helostthebikeworriedhimalot.4)_causedtheaccidentremainsunknown.5)_mademattersworsewas_nightbe
11、gantofall.6)_wecantgetseemsbetterthan_wehave.WhatWhatThatThatThatThat注:what 与 that在引导主语从句时的区别what what 在从句中充当句子成分,如主语、宾语、表在从句中充当句子成分,如主语、宾语、表语,而语,而that that 则不然。则不然。WhatWhatWhat thatWhat thatWhat What whatwhat二.it 做形式主语为了防止句子头重脚轻,通常把形式主语it放在主语位置,真正主语搁置于句末。1)It+be+名词/形容词 +主语从句Exx:很肯定他会赢得比赛的。_ that he
12、 will win the match.It is a fact that _(地球绕着太阳转)It is very likely that they will hold a meeting.It is important that we all should attend the meeting.It is still a mystery what caused the accident.It is certainthe earth goesaround the sun2)It+不及物动词(seem,happen,matter)+主语从句It seems that he has seen t
13、he film.似乎It happened that they were absent.碰巧3)It过去分词从句 It is said that President Obama will visit our school next week.据说 It is decided that 据决定It is believed that 据认为It is known to all that Li Hua is the best student in our class.众所周知1.This is natural that they should like each other.2.It is true
14、 he has made a very important discovery in chemistry.3.It doesnt matter that he is wrong or not.4.It is know to all that Lu Xun is a famous author.改错改错:It that whether knownWhatever he says is of no importance.Whoever says this is wrong 但谓语动词用单数还是复数,不可一概而论,而要视句子的意义而定 What I need is money.What I need
15、 are books.三三.在主语从句中,谓语一般用在主语从句中,谓语一般用单数单数单数单数。When and where well hold the meeting _not been decided yet.A.has B.is C.have D.areWhatever and whoever Whateveranything that Whoeveranyone who不管是谁犯了法,他都应该受到惩罚。Whoever breaks the law should be punished。Anyone who breaks the law should be punished.在下列情况下,
16、在下列情况下,在下列情况下,在下列情况下,whetherwhether不能被不能被不能被不能被 ifif所取代:所取代:所取代:所取代:1.whether引导主语从句引导主语从句如:如:Whetheritistrueremainsaproblem.2.引导表语从句用引导表语从句用whether,如:如:Thequestioniswhetheryoushouldacceptit.3.whether可以引导从句作介词的宾语,可以引导从句作介词的宾语,如:如:Imnotinterestedinwhethertheyllgoornot.Itdependsonwhetherwehavegotenough
17、money.4.whether可以直接跟动词不定式连用,可以直接跟动词不定式连用,如:如:Ididntknowwhethertolaughortocry.Shehasntdecidedwhethertogoornot.whether与与ifIf Mary really heard him was doubtful.Whether Mary really heard him was doubtful.It was doubtful if Mary really heard him主语从句置于句首时,不能用if 引导如果用it 作形式主语,就可以用if 引导不可省略的连词:不可省略的连词:1.引导
18、主语,同位语,表语从句的连词不可省略。引导主语,同位语,表语从句的连词不可省略。2.it作形式宾语的宾语从句作形式宾语的宾语从句3.并列宾语从句中,后面的从句引导词。并列宾语从句中,后面的从句引导词。Thatshewaschosenmadeusveryhappy.Weheardthenewsthatourteamhadwon.Thereasonisthatheistoocareless.Ithinkitnecessarythatyoushouldreadaloud.Hetold(that)hisfatherhaddiedandthathehadtomakealivingbyhimself.用用
19、用用it it it it 作形式主语的结构作形式主语的结构作形式主语的结构作形式主语的结构(1)(1)(1)(1)(1)Itis名词名词从句从句Itisafactthat事实是事实是Itisanhonorthat非常荣幸非常荣幸Itiscommonknowledgethat是常识是常识(2)Itis形容词形容词从句从句Itisnaturalthat很自然很自然Itisstrangethat奇怪的是奇怪的是用用用用it it it it 作形式主语的结构作形式主语的结构作形式主语的结构作形式主语的结构(2)(2)(2)(2)(3)Itis不及物动词不及物动词从句从句Itseemsthat似乎似
20、乎Ithappenedthat碰巧碰巧Itappearsthat似乎似乎(4)It过去分词过去分词从句从句Itisreportedthat据报道据报道Ithasbeenprovedthat已证实已证实Itissaidthat据说据说Exercises:Part One:主语从句单选题主语从句单选题1.has helped to save the drowning girl is worth praising.A.Who B.The one C.Anyone D.WhoeverD2.It was he said disappointed me.A.what;that B.that;that C.
21、what;what D.that;whatA3.well go camping tomorrow depends on the weather.A.If B.Whether C.That D.WhereB4.we cant get seems better than we have.A.What;what B.What;that C.That;that D.That;whatAPart Two:改错改错1.He doesnt like them is very clear.(That he)2.That has happened proves that my advice is right.(
22、What has)3.Because of my poor memory,that you told me has been forgotten.(what you/all that you)4.If he has signed his name doesnt matter.(Whether)5.What is the most important in life arent money.(isnt)1._youdontlikehimisnoneofmybusiness.A.WhatB.WhoC.ThatD.Whether2.AfterYangLiweisucceededincirclingt
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