主语从句讲解和练习

1、WORD格式整理.主语从句一、主语从句的连词分三类(1)隶属连词引导的主语从句(thatwhetherif)that引导的主语从句：引导词that无含艾/在句中不做成分/不能够够省。That引导主语从句过去用it作形式主语。好似：ThatyouwiIIwinthemedaIseemsuniikeIy.Thatshesurvivedtheaccidentisamiracle?whether引导的主语从句：whether有含狡(可否)/在句中不做成分/不能够够省。注意：引导主语从句，不能够用if不能够在开头.只能用whethero?Whethersheiscomingornotdoesntmatt

2、ertoomuch?(2)用连结代词引导的主语从句在由连结代词who,whose,whom,which,what,whoever,whomever,whichever,whatever引导的名词性从句中，其连结代词在句中超名词性作用，担当必然成分.好似：V/hatyouneedismorepractice.V/hateverwedoistoservethepeople?注：whatever/whoever的功用whatever,whoever在主语从句中不含疑问意狡。它引导主语从句，并在从句中作主语、宾语、表语等。whatever=anythingthat;whoever=anyonewho。

3、要注意和whatever,whoever引导的退步状语从句的差异。如：WhoeverbreaksthelawshouIdbepunished?(主语从句)(=AnyonewhobreaksthelawshouIdbepunished?)Whoeverbreaksthelaw,heshouldbepunished.(退步状语从句)(=Nomatterwhobreaksthelaw,heshouIdbepunished?)(3)用连结副词when,where,why,hov/引导的名词性从句(其连结副词有含狡，在句中作状语。)好似：WhereweshouIdIeaveitisaprobIem.专业

4、知识分亨.WORD格式整理.V/hentheywillcomehasn*tbeenmadepubic?三.it作形式主语的主语从句有时为了考虑句子平衡，过去在主语从句处使用形式主语it,而将真实的主语从句移至句末。这分四种情况：关于以连词that引导的主语从句，过去用形式主语it取代主语从句：Itis+名词+从句Itisafac11hat爭实是.Itisgoodnewsthat.是好信息：Itisaquestionthat.是个问题：ItiscommonknowIedgethat.是常亍只近似的名词还有：apity;awonder;agoodthingnowonder:surprise等。It

5、isamysterytomehowitalIhappened?ItiscommonknowIedgethatthewhaIeisnotafish?ItisnosurprisethatBobshouIdhavewonthegame?Itis+形容词+从句Itisnecessarythat有必要.;Itisclearthat很淸楚.:Itislikelythat很可能.Itisimportantthat重要的是.近似的形容词还有：strange;naturaI;obvious;true;good;wonderful;possible;uniikely;quite;unusual;certain;e

6、vident;worth-while;surprising;interesting;astonishing,etc.ItisdoubtfulwhethershewillbeabIetocome?Itisessentialthatheshouldbeherebytheweekend.ItseemsobviousthatwecannotgoonIikethis?Itisnecessarythatyou(should)masterthecomputer.需要注意的是这类主语从句中，谓语动词好多为“(should)+动词原形”，即要用虚假语气。Itis+过去分词+从句Itissaidthat扌松说.:

7、Itisreportedthat扌居扌艮道.Ithasbeenprovedthat已证明.Itmustbeprovedthat必定指出.近似的过去分词还有：known;estimated;expected;beIieved;thought;hoped;noted;discussed;required;decided;suggested;demanded;madeclear;foundout,etc.好似：Itisusedtobethoughtthatanewstarmustbeduetoacollisionbetweentwostars.专业知识分亨.WORD格式整理.Ithasnotbeen

8、madeclearwhenthenewroadistobeopenedtotraffic?Itseems不及扌勿动词(happened/appears/doesntmatter/makesnodifference/occurred)that主语从句不能趁早ItmakesnodiffereneewhetherhewiIIattendthemeetingornot.11doesnotmatterifImissedmytrain.IthappenedthatIsawhimyesterday.关于以连结代词(副词)引导的主语从句，能够使用形式主语代主语从句，也可直接在句首使用主语从句：Whethert

9、heywouldsupportuswasaproblem.他们可否会支持我们仍是一个问题。Itwasaproblemwhethertheywouldsupportus?他们可否会支持我们仍是一个问题。(3)对关系代词型what引导的主语从句，过去直接将主语从句放在句首。如：Whatweneedismoney?我们需要的是钱。WhatIwanttoknowisthis.我想知道的就是这一点。有时也可将助用形式主语。如Itisclearenoughwhathemeant.他是什么意思很清楚。若是句子是疑问句，则必定用带形式主语it的构造：Isittruethatheisthegirl*sfathe

10、r?他是那女孩的父亲，是真的吗？Howisitthatyouarelateagain?你怎么又迟到了？四.连词that的省略问题引导主语从句的连词that有时可省，有时不能够省，其原则是：若that引导的主语从句直接位于句首，则that不能够省略；若that引导的主语从句位于句末，而在句首使用了形式主语it,则that能够省略：Thatyoudidntgotothetalkwasapity.很遗憾你没去听报告。(that不能省)Itwasapity(that)youdidntgotothetalk.很遗憾你没去听报告。(that可省)高考题：1Itneveroccurredtome_C_you

11、couldsucceedinpersuadinghimtochangehismind.(陕西离考)A.whichB.whatC.thatD.If第一要理解句意.这句话的意思是说，我素来没想到你能够成功地说服他去改变，而不是我素来没想到你可否成功地说专业知识分亨.WORD格式整理.服他改变.第二，Itneveroccurredtome是用于关于某.个已发生的事实表示惊讶、惊讶的句型，因此这里youcouldsucceedinpersuadinghimtochange这个事实只能用that来引导：if是用于引导一个不确定性（uncertainty）的，这里不能够够用.2、Itsobvioustot

12、hestudentsB_theyshouldgetweIIpreparedfortheirfuture.（天津卷）A.asB.thatC.whichD.Whether考査名词性从句中的主语从句用法?此处要剖析句子构造it，为看形出式主语，取代thattheyshouldgetweIIpreparedfortheirfuture,并且本句意思完满，应选D?3、_B_somepeopleregardasadrawbackisseenasaplugbymanyothers?（2010T匕京）A.WhetherB.WhatC.ThatD.How考査名词性从句中的主语从句用法?此处要剖析句子构造，为看形

13、出式主语，取代thatittheyshouldgetweIIpreparedfortheirfuture,并且本句意思完满，应选D?4、11isuncertain_A_sideeffectthemedicinewiIIbringabout,aIthoughabouttwothousandpatientshavetakenit.（2010?浙江）A.thatB.howC.whatD.Whetherwhether是可否的意思这里应当是选B,what.因为跟后边sideeffect连是来,whatsideeffect,是表示“是什么副作用”整句话的意思是“诚然有两千多个病人服用的这个药，可是关于其带

14、来的详细的什么副作用仍是不明确的?”依照意思来选择，只能是B专业知识分亨.WORD格式整理.that,hov/,whether都不能够表达这个意思.主语从句练习题1?_C_makesmistakesmustcorrectthem.A.WhatB.ThatC.WhoeverD.V/hatever这句话重申的是宽泛性，因此用whoever任何人，而不是特指谁2.ItworriedherabitB_herhairwasturninggrey.A.whileB.thatC?ifD?for?该?题用常错和选剖析：句意：她的头发渐渐变得花白，使她不安whether引导该句則句意不C.Dif通?主语从句较长

15、时，多放在句子后部，用it作形式主语，此时,that也不能够省略.3.Whenandwhyhecamehere_A_yet.A.isnotknownB?arenotknownC?hasnotknownD?havenotknown因为，第一，这是现在完成时，yet是现在达成时的提示词，可是也能够是一般现在时第二,Whenandwhyhecamehere这个整个句子做主语，凡是句子做主语的，都是单数，因此是IS第三，这是被动，他何时来为什么来，还还没有为人所知悉若是是现在达成时，是hasnotbeenknown4._C_isnoreasonfordismissingher?A.Becauseshe

16、v/asafewminuteslateB?OwingtoafewminuteslateC?ThefactthatshewasafewminuteslateD.Beingafewminuteslate第一，句子不完满，缺的是能够充任主语的名词性的从句.A和B除去，都不是D若是真的要选的话，应当为：Beingafewminuteslateisnoreasonforherbeingdismissed.这个叫主语一致吧C由thefact引导的同位语名词性从句切合要求，骨干是：thefactisnoreasonfordismissingher?_D_TomIikedtoeatwasdifferentfr

17、om_.A.That?thatyouhadexpectedB?What?thatyouhadexpectedC?That?whatyouhadexpectedD.What?whatyouhadexpected选A.A.whatwhat作expected的宾语that不能够做句子成分意思是“汤姆喜欢吃的东西，与他以祈期盼的东西不同样样.6._D_wegoswimmingeveryday_usalotofgood?A.If.doB.That.doC?lf?doesD.That.doesThat指后边每日去游泳的爭因为是单3形式所用用does其实去掉中间的wegoswimmingeveryday（用

18、来补充that）简单来看，整句就是Thatdoseusalotofgood加上wegoswimmingeveryday用来混杂视听罢了、专业知识分亨.WORD格式整理.7.It_D_Bobdrivesbadly?A.thinksthatB.isthoughtwhatC?thoughtthatD.isthoughtthat这类构造都用被动比方itssaidthat最常有，可是中间换个词8.ItsuncertainC_theexperimentisworthdoing?A.ifB.thatC.whetherD.How应当用whether,关于不确定的事物要用whether,不用that.必然的时候

19、采用that,比较：IamsureofthathewiIIcome?IamnotsurewhetherhewiIIcome.9._A_theboydidnttakemedicinemadehismotherangry?A.ThatB.WhatC?HowD.WhichWhat要充任成分，而它后边的句子完满了，主谓宾齐备，因此附hat改为that相当于whatmadehismotherangryisthattheboydidnttakemedicine10._A_wecantgetseemsbetterthan_wehave?A.What,whatB.What,thatC?That,thatD.T

20、hat,what主要测试主语从句和表语从句。第一空测试主语从句：句子wecantget中动词get需要宾语；第二空测试表语从句：句子wehave中的动词have也需要宾语，结合所给答案可知均选择what置佳。11?_C_youdontlikehimisnoneofmybusiness?A.WhatB.WhoC.ThatD.Whether用that,句意是你不喜欢他，这不关我事.ThatyoudontIikehimisnoneofmybusiness?句中is是谓语，整个句子是主语从句.从句中youdontlikehim表达完满，内容构造都不缺，而主语从句不能省略引导词，于是我们用毫没心艾的th

21、at来引导该从句.whether在从句中，有“可否”的意思，此时便不合要求.要用whether,则句子改成：WhetheryouIikehimornotisnoneofmybusiness.你可否喜欢他，这不关我事.12.?_B_wellgocampingtomorrowdependsontheweather?A.IfB.WhetherC.ThatD.WhereB、C、D三项均可引导主语从句，可是本句含有疑问的意思，因此that除去；依照句意，可否camping和天气关系更加亲密，因此v/here除去：if虽也可表示“可否”，但其不能够引导主语从句，也除去._D_isgoingtodothej

22、obwiIIbedecidedbythePartycommittee.A.ThatB.WhyC?HowD?Who这是个主语从句.Whoisgoingtodothejob为主语（从句）川iIIbedecided为谓语，后边为状语.主语从句一般不用how引导，经常用whatthatwhichwhowhy引导_A_wellfinishtransIatingthebookdependsonthetime.A.WhenB.V/hyC.WhatD.That我们何时翻译完这本书取决于吋间.when引导的主语从句，从句主语，谓语完满，选择连系副词，根扌居意思选择.15._C_hewontgothereiscleartoallofus.A.HowB.WhatC?WhyD.This为什么他没有到达这里我们所有人都清楚16?_B_thehousewillbebuiItwiIIbediscussedattomorrowsme