主語從句定義

1、主從句定：在句子中擔(dān)當(dāng)主的是一個(gè)從句，個(gè)從句就叫做主從句。主從句是在復(fù)合句中充當(dāng)主的從句，平時(shí)放在主句從前或由形式主it代替，而自己放在句子尾端。主從句主要有三：（1）由that引的主從句:引that無含,在句中不做成分,不能夠夠省。Thatyouwillwinthemedalseemsunlikely.Thatyouaresoindifferentbothersme.Thatshesurvivedtheaccidentisamiracle.（2）用whether引的主從句:whether有含(可否),在句中不做成分,不能夠夠省。Whethersheiscomingornotdoesntmat

2、tertoomuch.3）用接代引的主從句(在由接代who,whose,whom,which,what,whoever,whomever,whichever,whatever引的名性從句中，其接代在句中起名性作用，擔(dān)當(dāng)必然成分).Whatyouneedismorepractice.WhatIwanttoknowisthis.Whateverwedoistoservethepeople.4）用接副when,where,why,how引的名性從句(其接副有含,在句中作狀。)eg:Whereweshouldleaveitisaproblem.Whentheywillcomehasntbeenmade

3、pubic.ATTENTION做形式主,而將主從句放在句末（特別是當(dāng)短）。比方：Thatlighttravelsinstraightlinesisknowntoall.=Itisknowntoallthatlighttravelsinstraightlines.Whentheplaneistotakeoffhasnotbeenannounced.=Ithasnotbeenannouncedwhentheplaneistotakeoff.(當(dāng)what引的主從句表示“的西”，一般不用it作形式主。)Whathewantsisabook.他想要的是本。Hasitbeensettledwhowillb

4、esenttocarryoutthetask固定用法和法1）Itis+名+從句Itisgoodnewsthat是好消息Itisaquestionthat是個(gè)Itiscommonknowledgethat是常似的名有：apity；awonder；agoodthing；nowonder；surprise等。比方：Itisamysterytomehowitallhappened.Itiscommonknowledgethatthewhaleisnotafish.ItisnosurprisethatBobshouldhavewonthegame.2）Itis+形容+從句Itisnecessarytha

5、t有必要Itisclearthat很清楚Itislikelythat很可能Itisimportantthat重要的是似的形容有：strange;natural;obvious;true;good;wonderful;possible;unlikely;quite;unusual;certain;evident;worth-while;surprising;interesting;astonishing,etc.Itisobviousthatconductorsandinsulatorsarebothimportantinindustry.Itisdoubtfulwhethershewillbe

6、abletocome.Itwasreallyastonishingthatherefusedtotalktoyou.Itisessentialthatheshouldbeherebytheweekend.Itseemsobviousthatwecannotgoonlikethis.3）Itis+去分+從句Ithasbeenprovedthat已明Itmustbeprovedthat必指出似的去分有：known;estimated;expected;believed;thought;hoped;noted;discussed;required;decided;suggested;demanded

7、;madeclear;foundout,etc.Itisthoughtthatheisthebestplayer.Itisestimatedthatthevaseis2000yearsold.Itisusedtobethoughtthatanewstarmustbeduetoacollisionbetweentwostars.Ithasnotbeenmadeclearwhenthenewroadistobeopenedtotraffic.ItdoesnotmatterifImissedmytrain,becausethereisanotherlater.IthappenedthatIsawhi

8、myesterday.當(dāng)“及物+”短，也可用種構(gòu)。ItshockedmethatPeterdidnottellanybodywherehewas.Itdoesnotinterestmewhetheryougoornot.2.只用whether不用if引主從句.主從句三要點(diǎn)察以下句子，注意劃部分句子的意及用法。Whatsurprisedmemostwasthatthelittlegirlcouldplaytheviolinsowell.Whowillgototheconcertisnotknown.Thatshewaschosenmadeusveryhappy.Whethershewillcom

9、eornotisstillaquestion.Whichbooktheywillchooseisstillunknown.Whenweshallholdoursportsmeetisnotdecided.Itsstrangethatheknowsnothingaboutit.Itisapitythatshehasmadesuchamistake.ItissaidthatPresidentJingowillvisitourschoolnextweek.小(一)序主從句使用述序，其平時(shí)構(gòu)“引+主+其他成分”；但當(dāng)接代同充當(dāng)從句主，其構(gòu)“接代+其他成分”，如句1、2。(二)引that引主從句無，也不

10、充當(dāng)任何成分，但平時(shí)不能夠夠省略，如句3；whether引主從句意“可否”，平時(shí)不能夠用if來代替,如句4；能夠引主從句的接代主要有：who,whom,whose,what,which,whatever,whoever等，如句5；能夠引主從句的接副主要有：where,when,how,why等，如句6。(三)常有句型有時(shí)為防備句子有頭無尾，常用it作形式主語，代替主語從句放在句首，而把主語從句置于句末。常用句型以下：It+be+形容詞+that從句，如句7;It+be+名詞+that從句，如句8;It+be+動(dòng)詞的過去分詞+that從句，如句9。即學(xué)即用I.用合適的詞填空，使句子意思完滿。1.

11、_hedidntattendthemeetingyesterdaywasntquiteclear.2.TheForeignMinistersaid,“Itisourhope_thetwosideswillworktowardspeace.”_teamwillwinthematchisstillunknown._comestothepartywillreceiveapresent._Maryhasleftisstillaquestion.Itsreported_threepeoplewerekilledintheaccidentandfivewerehurtbadly._hesolvedthep

12、roblemsuccessfullyinterestedallofus.Weusuallythink_wecantgetseemsbetterthanwhatwehave.Itisafact_Englishisbeingacceptedasaninternationallanguage.10._istobesenttheretosolvetheproblemhasnd.tbeendecide以下各句中均有一處錯(cuò)誤，請(qǐng)改正。Thattheoldmanssonwantedtoknowwaswherethegoldhadbeenhidden.ItisreportedwhenChinahassucce

13、ssfullysentShenzhouVIspaceshipintospace.Ifhecanfinishhistaskontimeisofgreatimportance.Whetherthe2008OlympicGameswillbeheldinBeijingexcitedthewholenation.AfterYangLiweisucceededincirclingtheearth,whichourastronautsdesiretodoiswalkinspace.Whateverleavestheroomlastoughttoturnoffthelights.Whytheywillsol

14、vetheseriousproblemtodayhasnotbeendecided.WhenwillwintheEnglishcompetitionisstillaproblem.Howourspringsportsmeetwillbeheldornotthisweekisnotknownyet.Itsstrangewhenheshouldhavegoneawaywithoutellingtus.主語從句學(xué)習(xí)指導(dǎo)尋規(guī)找矩請(qǐng)觀察以下句子，注意主語從句的用法。Thattheearthtravelsroundthesunisawell-knownfact.Itisuncertainwhetherth

15、eartistcandoitornot.Whowillacttheleadintheplayhasnotbeendecidedyet.Wheretheyoungmanhasgoneisnotknown.Itisnotyetdecidedwhenandwherethetestwillbegiven.歸納總結(jié)引導(dǎo)主語從句的詞有連詞that,whether；連接代詞who,whose,whom,whoever,what,which等；連接副詞where,when,whenever,wherever,how,why等。有時(shí)用it作形式主語，將主語從句后置。常有錯(cuò)誤顯現(xiàn)以下各句均有一處錯(cuò)誤，請(qǐng)改正并解析

16、錯(cuò)誤的原因。1.Lighttravelsfasterthansoundiscommonknowledge.2.Ifshescomingornotdoesntmattermuch.Thattheprofessorsaidisofgreatimportance.Wherewillthetreesbeplantedhasnotbeendecided.Nomatterwhobreakstherulewillbepunished.Whenandwherethemeetingwillbeheldstillremainaquestion.Whatwereyourproblemsayearagohasnowb

17、ecomemine.Itwasrequestedthateveryonemadeaspeechatthemeeting.高考鏈接從A、B、C、D四個(gè)選項(xiàng)中選出能夠填入空白處的最正確選項(xiàng)。_wantstostayinahotelhastopaytheirownway.浙(江2008)A.AnyoneB.TheoneC.WhoeverD.Who_mattersmostinlearningEnglishisenoughpractice.(2007全國(guó)卷)A.WhatB.WhyC.WhereD.Which_fashiondiffersfromcountrytocountrymayreflectthec

18、ulturaldifferencesfromoneaspect.(上海2002春)A.WhatB.ThatC.ThisD.Which_wellgocampingtomorrowdependsontheweather.(NMET1996)A.IfB.WhetherC.ThatD.Where主語從句練習(xí)單項(xiàng)選擇題1._asmuchasone-fifthofalltimberharvestedisnotused.A.TheestimateB.TheestimateC.TheyareestimatedD.Itisestimatedthat2._wasonceregardedasimpossibleha

19、snowbecomeareality.A.ThatB.WhichC.WhoD.What3._wehaveachievedisattributedtotheguidanceofourparents.A.WhoeverB.WhateverC.HoweverD.That4._yousaynowcantmakeupforwhatyouvedone.A.NomatterB.WhateverC.HoweverD.ThatAlthough_happenedinthisdevelopedcountrysoundslikesciencefiction,itcouldoccurelsewhereintheworl

20、d.A.whichB.whatC.howD.it6._shehadforgottentotakehernotebook.A.ThatoccurredtoherB.SheoccurredthatC.ToherthatoccurredD.Itoccurredtoherthat7.Iamsurethat_shesaidiswrong.A.whichB.allC.thisD.whatWelostourwayintheforest,and_mademattersworsewasthatitwasgettingdark.A.thatB.whichC.itD.what9._occurredtohimthat

21、hehadforgottentolockthedoorwhenhelefthome.A.ThisB.ItC.ThatD.These10._ornotisstilluncertain.A.HescomingB.IfheiscomingC.ThatcomingD.Whetherhescoming11.Its_hebellabletocome.A.doubtwhetherB.doubtfulC.doubtitD.doubtfulwhether12.Itis_thatthebridgehasexistedformorethanthreecenturies.A.appearedB.risenC.said

22、D.born13._hesawbothsurprisedandfrightenedhim.A.ThatB.WhenC.WhatD.Which14._isaspellofwarmsunshine.A.Whatdoweallneed.B.WhatallweneedC.WhatweneedD.Whatweallneed15._isapitythatheshouldfeelsoupset.A.WhatB.ThatC.HeD.It_aspoonfulofsoilcantellussomuchaboutthestructureandearlyhistoryofthemoon.A.RemarkableB.Q

23、uiteremarkablyC.ItisremarkablethatD.Itisremarkable17._younominatewillbeelected.A.WhoB.WhichC.WhomeverD.Thats18._bookyouborrowmustbereturnedwithinaweek.A.WhatB.WhichC.WhicheverDThat.s19._istroublingmeisthatIdonthavemuchexperienceininternationalcommerce.A.ItB.ThatC.WhichD.What20._theywilgotheretotryan

24、otherexperimenthasnotbeendecidedyet.A.WhetherB.IfC.AboutwhetherD.Why依照提示，完成句子。hasntbeendecidedyet.(pick)誰將去接他還沒有確定。remainsunknown.(finish)我們可否能準(zhǔn)時(shí)完成工作還不知道isnoneofmybusiness.(like)你喜不喜歡他都與我沒關(guān)。isbeingdiscussed.(abroad)他將何時(shí)出國(guó)正在談?wù)撝?。inlearningEnglishisenoughpractice.(matter)英語學(xué)習(xí)中最重要的是足夠的練習(xí)。worriedherabit

25、_.(turn)她的頭發(fā)正在變白讓她有些擔(dān)憂。YangLiweisucceededincirclingtheearth,_ourastronautswalkinspace.(desire)楊利偉成功地環(huán)繞地球后，我們希望的是宇航員在太安漫步。8._shouldbepunished.(break)任何違紀(jì)的人都應(yīng)該被處分。wecanlearnfourforeignlanguagesatthesametime.(seem)我們能同時(shí)學(xué)四門外語憂如不能能。wasthatmorethan90%ofthestudentshadbeenadmittedtothekeyuniversities.讓這所學(xué)校感覺驕傲的是高出90%的學(xué)生被要點(diǎn)大學(xué)錄取了。主語從句15DDBBB610DDDBD1115DCCDD1620CACDAwillpickhimupwecanfinishtheworkontimeyoulikehim(ornot)hewill