高中英语名词性从句详细讲解

名词性从句

名词性从句

nounclause

主语从句subjectclause

宾语从句objectclause

表语从句predicativeclause

同位语从句appositiveclause辨别下列名词性从句的类别：1.Howthebookwillselldependsonitsauthor.2.JohnsaidthathewasleavingforLondononWednesday.3.Thefactisthathehasnotbeenseenrecently.4.Thefactthathehasnotbeenseenrecentlydisturbseveryoneinhisoffice.5.HewilltalktousaboutwhathesawinU.S.6.Itisimpossible

thatIgoandattendthemeeting.主语从句宾语从句表语从句同位语从句宾语从句主语从句That/wh-clause+v+…主语从句S+be/link.v+that/wh-clause表语从句S+vt+that/wh-clause宾语从句S+vi+prep+

wh-clause宾语从句

名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。

引导名词性从句的连接词可分为三类：

连接词：that,whether,if连接代词：what,whatever,who,whoever,whom,whose,which.连接副词：when,where,how,why1。that只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义，宾语从句中可省略2。不充当介宾3。引导主语从句、表语从句和同位语从句,that不可省略。4.thatwhether,if,asif,asthough（以上在从句中均不充当任何成分

一．主语从句

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it代替，而本身放在句子末尾。1.It作形式主语

It作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。例如：

Itisapitythatyoudidn’tgotoseethefilm.Itdoesn’tinterestmewhetheryousucceedornot.

1.It+be+形容词＋that从句Itisnecessary/

important/obvious

that…2.It+be+-ed分词＋that从句Itisbelievedthat…人们相信…Itisknowntousallthat….众所周知…Ithasbeendecidedthat……已经决定……3.It+be+名词＋that从句Itiscommonknowledgethat……是常识Itisasurprisethat….令人惊奇的是…Itisafactthat……事实是……4.It+不及物动词＋that从句Itappearsthat…似乎…Ithappensthat….碰巧…Itoccurredtomethat……我突然想起……另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should)+do”，常用的句型有：Itisnecessary(important,natural,strange,etc.)that…Itissuggested(requested,proposed,desired,etc.)that…

what引导主语从句时在句时在从句中充当句子成分，如主语．宾语．表语，而that则不然。例如：

1)______yousaidyesterdayisright.2)______sheisstillaliveisagoodthing.Itisrightwhatyousaidyesterday.Itisagoodthingthatsheisstillalive.WhatThat2.what与that在引导主语从句时的区别

主语从句中的“主谓一致”：1.主语从句通常被看作一个整体,主句的谓语动词用单数形式.Thattheywillcome_______certain.2.What引导主语从句时,主句谓语动词的单复数由表语的单复数决定.Whathewants______thesebooks.Whathewants______somewater.3.注意isareis1_________

intheregulationsthatyoushouldnottellotherpeoplethepasswordofyoure-mailaccount..(2005上海)A.WhatisrequiredB.Whatrequires

CItisrequiredD.Itrequires2.TheForeignMinistersaid,“_______ourhopethatthetwosideswillworktowardspeace.”(2006北京)A.ThisB.ThereisC.ThatisD.Itis3.AfterYangLiweisucceededincirclingtheearth,_______ourastronautsdesiretodoiswalkinspace.(2004上海)A.whereB.whatC.thatD.how

Exercises

宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词(及物动词)或介词之后。1.Shedidnotknowwhathadhappened.

2.Oursuccessdependsuponhowwellwecancooperatewithoneanother.3.Iamafraid(that)I’vemadeamistake.宾语从句

(作动词的宾语)(作介词的宾语)(作形容词的宾语)注意1：在demand，order，suggest，decide，insist,desire,request,command,doubt等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“（should）+动词原形”。Iinsistthatshe(should)doherworkalone.我坚持要她自己工作。Thecommanderorderedthattroops(should)setoffatonce.司令员命令部队马上出发。2.用whether或if引导的宾语从句，其主语和谓语的顺序也不能颠倒，仍保持陈述句语序。此外，whether与if在作“是否”的意思讲时在下列情况下一般只能用whether，不用if：a.引导主语从句并在句首时；b.引导表语从句时；c.引导从句作介词宾语时；d.从句后有“ornot”时；e.后接动词不定式时。

Whetherthereislifeonthemoonisaninterestingquestion.

Thequestioniswhethersheshouldhavealowopinionofthetest?

Everythingdependsonwhetherwehaveenoughmoney.

Iwonderwhetherhewillcomeornot.Canyoutellmewhethertogoortostay?3.宾语从句中的“时态呼应”与“否定转移”

若主句谓语动词为think,

consider,

suppose,

believe,

expect,

fancy,

guess,

imagine等，其后的宾语从句若含有否定意义，一般要把否定词转移到主句谓语上，从句谓语用肯定式。例如：

Hetoldmethathe____________hisjob.(已经完成了工作)时态呼应否定转移我认为他不会来这里.Ithinkhewon’tcomehere.()Idon’tthinkhewillcomehere.()hadfinished注意4.宾语从句中用it作形式宾语Wethinkitourdutythatweshouldhelpothers.注意：如果主句中有形容词或名词作宾语补足语时，一般用it来作形式宾语，把从句放在宾补后面。我发现他两天之内完成工作是不可能的.Ifinditimpossiblethathecanfinishtheworkintwodays.Exercises:“it”作形式主语或形式宾语：

1.Ihate____

whenpeopletalkwiththeirmouthsfull．

A.it

B.thatC.theseD.them2.Ifeel____strangethatheshouldbesocareless.A./B.itC.thatD.how3.Itworriedherabit

____herhairwasturninggrey.A．whileB.thatC．if

D．for4Willyouseeto____thattheluggageisbroughtback?A.we B.yourself C.it D.them

ABBC三．表语从句表语从句在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语＋连系动词＋表语从句”。可以接表语从句的连系动词有be,look,remain,seem等。另外，常用的还有thereasonisthat…和Itisbecause等结构。例如：1)Thequestionis_________wecanmakegoodpreparationinsuchashorttime.2)Thisis____wecan’tgetthesupportofthepeople.3)Butthefactremains___wearebehindtheotherclasses.4)Thereason______heislateforschoolis____hemissedtheearlybus.whether/howwhythatwhythat四．同位语从句1.同位语从句的功能同位语从句对于名词进一步解释，说明名词的具体内容，一般由that引导，例如：

1)Theking’sdecisionthattheprisonerwouldbesetfreesurprisedallthepeople.2)Theorderthatallthesoldiersshouldstaystillisgivenbythegeneral.

同位语从句就是在复合句中作名词的同位语的名词性从句。2.同位语在句子中的位置同位语从句有时可以不紧跟在它所说明的名词后面，而是被别的词隔开。例如：

HegotthenewsfromMarythatthesportsmeetingwasputoff.

同位语从句和定语从句的区别：that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略；that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。Ihadnoideathatyouwerehere．（that引导同位语从句，不能省略）Haveyougottheidea（that）thisbookgivesyouoflifeinancientGreece？（that引导定语从句，作宾语，可以省略）

Exercises1.Doris’successliesinthefact________sheisco-operativeandeagertolearnfromothers.(2006上海春季)A.whichB.thatC.whenD.why2.Doyouhaveanyidea_______isactuallygoingonintheclassroom?(2005辽宁)A.thatB.whatc.asD.which3.Thereisafeelinginme______we’llneverknowwhataUFOis–notever.(2002上海)A.thatB.whichc.ofwhichD.what4.Informationhasbeenputforward_______moremiddleschoolgraduateswillbeadmittedintouniversities.A.whileB.thatC.whenD.as(1)Theywanttoknow_____dotohelpus.A.whatcanthey B.whattheycan C.howtheycan D.howcanthey(2)Canyoumakesure_____thegoldring?A.whereAlicehadputB.wherehadAliceputC.whereAlicehasputD.wherehasAliceput(3)SomeoneisringingMary.Goandsee_____.A.whoishe B.whoheis C.whoisit D.whoitisBCI.语序问题考点归纳D归纳

在名词性从句中，除了关联词在从句之首外，其它部分应用________的语序。陈述II.用if或whether填空1.Idon’tknow_______I’llbefreetomorrow.2.Idon’tknow_______ornotI’llbefreetomorrow.3.Thequestionis______thisbookisworthwriting.4.Itdependson______wewillhaveenoughmoney.5.______theycandoitmatterslittletous.6._______youarenotfreetomorrow,I’llgowithoutyouwhether/ifwhetherwhetherwhetherWhetherIfa.主语从句、表语从句、同位语从句、介词后面的宾语从句只能用________，不能用if；b.后面紧跟ornot时,用___________.归纳whetherwhetherIII.that

与whether/if的选择：

(1)_____knowledgecomesfrompracticeisknowntoall.What B.Where C.If D.That(2)Itmakesnodifference_____oursportsmeetwillbeheldthisweekornextweek.A.that B.either C.whether D.when(3)Idoubt_____________hewillcomesoon.(4)Idonotdoubt_____________hewillcomesoon.(5)Doyoudoubt____________hewillcomesoon?DCwhether/ifthatthat

表示是否时用__________,表示肯定时用_______归纳whether/ifthat1._________Ican’tunderstandiswhyhehaschangedhismind.2.___________theearthisroundisknowntousall.3.______hewontheracewas______weexpected.that:what:

_______只起连接作用，在从句中不充当任何成分，没有词义_______起连接作用，且在从句中充当主语，宾语或表语，表示“所……的”。ThatWhatThatwhat归纳Ⅳ.that，what引导名词性从句的区别Ⅴ.what&whateverwho&whoeverwhich&whichever引导名词性从句的区别1.___________isworthdoingisworthdoingwell.2.__________weneedismoretime.3.___________madethelongdistancecalltohimisnotimportant.4.___________breaksthelawwillbepunished.WhateverWhatWhoWhoever

___________________等引导的名词性从句不含有疑问意义，相当于名词后加一个定语从句，而____________________等引导的名词性从句都含有疑问意义。Whoever,whateverWho,what1.It'sgenerallyconsideredunwisetogiveachild_______heorshewants.which B.that C.whatever D.allwhat2.ThesewildflowersaresospecialthatIwoulddo_______Icantosavethem.which B.that C.whateverD.allwhat3._____kills,sellsoreatswildanimalsorbirds,istoblame.Anyone B.Anyonewho C.Thosewho D.ThoseBCCExercisesⅥ.名词性从句中的虚拟语气：Hesuggestedthatameeting(should)beheldimmediately.

Itwassuggestedthatameeting(should)beheldimmediately.

Hissuggestionwasthatameeting(should)beheldimmediately.Hemadeasuggestionthatameeting(should)beheldimmediately.

表示建议,请求,命令,要求,坚持等的名词性从句中谓语动词用虚拟语气.归纳2.在主语从句中用来表示惊奇,不相信,惋惜,理应如此等,谓语动词用虚拟语气(should)+do,常用句型有

1)Itisnecessary(important,natural,strange,etc)……that……2)Itisapity(ashame,nowonderetc,)……that……e.g.Itisstrangethatshe(should)thinkso.试区分以下句子Doyouknowthefactthathestolethecar?Doyouknowthefactthattheyweretalkingabout?注意：1.如果是定语从句，它的从句肯定是不完整的，关系词肯定在句中充当成分的；而同位语从句中的that只起连接作用。

2.定语从句是对先行词起修饰作用，而同位语从句则解释说明前面名词的具体内容。(同从)(定从)拓展高考再现1.(NMET1995)

isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It2.(NMET1996)

wecan’tgetseemsbetterthan

wehave.A.What,whatB.What,thatC.That,thatD.That,what3.(NMET2001春)Ireadaboutitinsomebookorother,doesitmatter

itwas?A.whereB.whatC.howD.which4.(NMET1997)It’sgenerallyconsideredunwisetogiveachild

heorshewants.A.howeverB.whateverC.whicheverD.wherever5.(NMET1999)–IdrovetoZhuhaifortheairshowlastweek.-Isthat

youhadafewdaysoff?A.whyB.whenC.whatD.whereDADBA1.Thequestionis____thefilmisworthseeing.A.ifB.whatC.whetherD.how2.Theyreceivedorders_____theworkbedoneatonce.A.whichB.whenC./D.that3.Thereason____Ihavetogois____mymotherisillinbed.A.why;whyB.why;becauseC.why;thatD.that;becauseCCDConsolidation:4.___Ican’tunderstandis___shewantstochangehermind.A.What;whyB.Which;howC.That;whyD.What;because5.____hisdreamofgoingtocollegewillcometrueisuncertain.A.ThatB.WhetherC.IfD.Evenif6.Itisknowntous___wherethereispollution,thereisharm.A.whichB.whereC.what