主語從句定義

1、主語從何定義：在句子中擔(dān)當(dāng)主語的是一個從句,這個從何就叫做主語從何.主語從句是在復(fù)合句中充當(dāng)主語的從何,通常放在主句謂語動詞之前或由形式主語it代替,而本身放在句子末尾.主語從句主要有三類：(1)由連詞that引導(dǎo)的主語從句：引導(dǎo)詞that無含義,在句中不做成分,不可以省.Thatyouwillwinthemedalseemsunlikely.Thatyouaresoindifferentbothersme.Thatshesurvivedtheaccidentisamiracle.(2)用連詞whether引導(dǎo)的主語從句：whether有含義(是否),在句中不做成分,不可以省.Whethers

2、heiscomingornotdoesn'tmattertoomuch.(3)用連接代詞引導(dǎo)的主語從句(在由連接代詞who,whose,whom,which,what,whoever,whomever,whichever,whatever引導(dǎo)的名詞性從句中,其連接代詞在句中起名詞性作用,擔(dān)當(dāng)一定成分).Whatyouneedismorepractice.WhatIwanttoknowisthis.Whateverwedoistoservethepeople.(4)用連接副詞when,where,why,how引導(dǎo)的名詞性從何(其連接副詞有含義,在句中作狀語.)eg:Wherewesho

3、uldleaveitisaproblem.Whentheywillcomehasn'tbeenmadepubic.ATTENTION做形式主語,而將主語從何放在旬末(尤其是當(dāng)謂語較短時).例如：Thatlighttravelsinstraightlinesisknowntoall.=Itisknowntoallthatlighttravelsinstraightlines.Whentheplaneistotakeoffhasnotbeenannounced.=Ithasnotbeenannouncedwhentheplaneistotakeoff.(當(dāng)what引導(dǎo)的主語從何表示“的東西

4、時,一般不用it作形式主語.)Whathewantsisabook.他想要的是本書.Hasitbeensettledwhowillbesenttocarryoutthetask固定用法和譯法(1) Itis+名詞+從旬Itisafactthat事實是Itisgoodnewsthat是好消息Itisaquestionthat是個問題Itiscommonknowledgethat是常識類彳以的名詞還有：apity;awonder；agoodthing；nowonder；surprise等.例如：Itisamysterytomehowitallhappened.Itiscommonknowledge

5、thatthewhaleisnotafish.ItisnosurprisethatBobshouldhavewonthegame.(2) Itis+形容詞+從句Itisnecessarythat有必要Itisclearthat很清楚Itislikelythat很可能Itisimportantthat重要的是類彳以的形容詞還有：strange;natural;obvious;true;good;wonderful;possible;unlikely;quite;unusual;certain;evident;worth-while;surprising;interesting;astonishi

6、ng,etc.Itisobviousthatconductorsandinsulatorsarebothimportantinindustry.Itisdoubtfulwhethershewillbeabletocome.Itwasreallyastonishingthatherefusedtotalktoyou.Itisessentialthatheshouldbeherebytheweekend.Itseemsobviousthatwecannotgoonlikethis.(3) Itis+過去分詞+從句Itissaidthat據(jù)說Itisreportedthat據(jù)報道Ithasbeenp

7、rovedthat已證實Itmustbeprovedthat必須指出類彳以的過去分詞還有：known;estimated;expected;believed;thought;hoped;noted;discussed;required;decided;suggested;demanded;madeclear;foundout,etc.Itisthoughtthatheisthebestplayer.Itisestimatedthatthevaseis2000yearsold.Itisusedtobethoughtthatanewstarmustbeduetoacollisionbetweent

8、wostars.Ithasnotbeenmadeclearwhenthenewroadistobeopenedtotraffic.ItdoesnotmatterifImissedmytrain,becausethereisanotherlater.IthappenedthatIsawhimyesterday.當(dāng)及物動詞+賓語較短時,也可用這種結(jié)構(gòu).ItshockedmethatPeterdidnottellanybodywherehewas.Itdoesnotinterestmewhetheryougoornot.2.只用whether不用if引導(dǎo)主語從句.主語從句三要點請觀察以下句子,注意劃

9、線局部句子的意義及用法.1. Whatsurprisedmemostwasthatthelittlegirlcouldplaytheviolinsowell.2. Whowillgototheconcertisnotknown.3. Thatshewaschosenmadeusveryhappy.4. Whethershewillcomeornotisstillaquestion.5. Whichbooktheywillchooseisstillunknown.6. Whenweshallholdoursportsmeetisnotdecided.7. Itsstrangethatheknow

10、snothingaboutit.8. Itisapitythatshehasmadesuchamistake.9. ItissaidthatPresidentJingowillvisitourschoolnextweek.小結(jié)歸納一語序主語從何使用陳述語序,其通常結(jié)構(gòu)為引導(dǎo)詞+主語+謂語+其他成分；但當(dāng)連接代詞同時充當(dāng)從旬主語時,其結(jié)構(gòu)為連接代詞+謂語+其他成分,如旬1、2.二引導(dǎo)詞that引導(dǎo)主語從何時無詞義,也不充當(dāng)任何成分,但通常不可以省略,如何3;whether引導(dǎo)主語從何時意為是否,通常不能用if來代替,如何4； 可以引導(dǎo)主語從句的連接代詞主要有：who,whom,whose,wha

11、t,which,whatever,whoever等,如旬5; 可以引導(dǎo)主語從句的連接副詞主要有：where,when,how,why等,如何6.三常見句型有時為防止句子頭重腳輕,常用it作形式主語,代替主語從何放在旬首,而把主語從旬置于旬末.常用句型如下：It+be+形容詞+that從旬,如旬7;It+be+名詞+that從旬,如旬8;It+be+動詞的過去分詞+that從旬,如何9.即學(xué)即用I.用適當(dāng)?shù)脑~填空,使句子意思完整.1 .hedidn'tattendthemeetingyesterdaywasn'tquiteclear.2 .TheForeignMinistersa

12、id,“Itisourhopethetwosideswillworktowards“peace.3 .teamwillwinthematchisstillunknown.4 estothepartywillreceiveapresent.5 .Maryhasleftisstillaquestion.6 .Itsreportedthreepeoplewerekilledintheaccidentandfivewerehurtbadly.7 .hesolvedtheproblemsuccessfullyinterestedallofus.8 .Weusuallythinkwecan'tge

13、tseemsbetterthanwhatwehave.9 .ItisafactEnglishisbeingacceptedasaninternationallanguage.10 .istobesenttheretosolvetheproblemhasnd.'tbeendecideII.以下各句中均有一處錯誤,請改正.1. Thattheoldmanssonwantedtoknowwaswherethegoldhadbeenhidden.2. ItisreportedwhenChinahassuccessfullysentShenzhouVIspaceshipintospace.3.

14、Ifhecanfinishhistaskontimeisofgreatimportance.4. Whetherthe2021OlympicGameswillbeheldinBeijingexcitedthewholenation.5. AfterYangLiweisucceededincirclingtheearth,whichourastronautsdesiretodoiswalkinspace.6. Whateverleavestheroomlastoughttoturnoffthelights.7. Whytheywillsolvetheseriousproblemtodayhasn

15、otbeendecided.8. WhenwillwintheEnglishcompetitionisstillaproblem.9. Howourspringsportsmeetwillbeheldornotthisweekisnotknownyet.10. ItsstrangewhenheshouldhavegoneawaywitetUurtgtus.主語從何學(xué)習(xí)指導(dǎo)尋規(guī)找矩請觀察以下句子,注意主語從句的用法.1. Thattheearthtravelsroundthesunisawell-knownfact.2. Itisuncertainwhethertheartistcandoito

16、rnot.3. Whowillacttheleadintheplayhasnotbeendecidedyet.4. Wheretheyoungmanhasgoneisnotknown.5. Itisnotyetdecidedwhenandwherethetestwillbegiven.歸納總結(jié)1 .引導(dǎo)主語從何的詞有連詞that,whether；連接代詞who,whose,whom,whoever,what,which等；連接副詞where,when,whenever,wherever,how,why等.2.有時用it作形式主語,將主語從句后置常見錯誤展示以下各句均有一處錯誤,請改正并分析錯誤

17、的原因.1. Lighttravelsfasterthansoundiscommonknowledge.2. Ifshe'scomingornotdoesn'tmattermuch.3. Thattheprofessorsaidisofgreatimportance.4. Wherewillthetreesbeplantedhasnotbeendecided.5. Nomatterwhobreakstherulewillbepunished.6. Whenandwherethemeetingwillbeheldstillremainaquestion.7. Whatwereyo

18、urproblemsayearagohasnowbecomemine.8. Itwasrequestedthateveryonemadeaspeechatthemeeting.高考鏈接從A、B、CD四個選項中選出可以填入空白處的最正確選項.1 .wantstostayinahotelhastopaytheirownway.浙江2021A.AnyoneB.TheoneC.WhoeverD.Who2 .mattersmostinlearningEnglishisenoughpractice.2007全國卷HA.WhatB.WhyC.WhereD.Which3 .fashiondiffersfrom

19、countrytocountrymayreflecttheculturaldifferencesfromoneaspect.±海2002春A.WhatB.ThatC.ThisD.Which4 .we'llgocampingtomorrowdependsontheweather.NMET1996A.IfB.WhetherC.ThatD.Where主語從句練習(xí)單項選擇題1 .asmuchasone-fifthofalltimberharvestedisnotused.A.TheestimateB.TheestimateC.TheyareestimatedD.Itisestimat

20、edthat2 .wasonceregardedasimpossiblehasnowbecomeareality.A.ThatB.WhichC.WhoD.What3 .wehaveachievedisattributedtotheguidanceofourparents.A.WhoeverB.WhateverC.HoweverD.That4 .yousaynowcan'tmakeupforwhatyou愉vedone.A.NomatterB.WhateverC.HoweverD.That5. Althoughhappenedinthisdevelopedcountrysoundslik

21、esciencefiction,itcouldoccurelsewhereintheworld.A.whichB.whatC.howD.it6.shehadforgottentotakehernotebook.A.ThatoccurredtoherB.SheoccurredthatC.ToherthatoccurredD.Itoccurredtoherthat7. Iamsurethatshesaidiswrong.A.whichB.allC.thisD.what8. Welostourwayintheforest,andmademattersworsewasthatitwasgettingd

22、ark.A.thatB.whichC.itD.what9.occurredtohimthathehadforgottentolockthedoorwhenhelefthome.A.ThisB.ItC.ThatD.These10.ornotisstilluncertain.A.He'comingB.IfheiscomingC.ThatcomingD.Whethehie'coming11. It'she'beabletocome.A.doubtwhetherB.doubtfulC.doubtitD.doubtfulwhether12. Itisthatthebrid

23、gehasexistedformorethanthreecenturies.A.appearedB.risenC.saidD.born13. hesawbothsurprisedandfrightenedhim.A.ThatB.WhenC.WhatD.Which14.isaspellofwarmsunshine.A.Whatdoweallneed.B.WhatallweneedC.WhatweneedD.Whatweallneed15.isapitythatheshouldfeelsoupset.A.WhatB.ThatC.HeD.It16.aspoonfulofsoilcantellusso

24、muchaboutthestructureandearlyhistoryofthemoon.A.RemarkableB.QuiteremarkablyC.ItisremarkablethatD.Itisremarkable17 .younominatewillbeelected.A.WhoB.WhichC.WhomeverD.That's18 .bookyouborrowmustbereturnedwithinaweek.A.WhatB.WhichC.WhicheverThat's19 .istroublingmeisthatIdonthavemuchexperienceini

25、nternationalcommerce.A.ItB.ThatC.WhichD.What20 .theywilgotheretotryanotherexperimenthasnotbeendecidedyet.A.WhetherB.IfC.AboutwhetherD.Why根據(jù)提示,完成句子.hasn'tbeendecidedyet.(pick)誰將去接他還沒有確定.remainsunknown.(finish)我們是否能按時完成工作還不知道isnoneofmybusiness.(like)你喜不喜歡他都與我無關(guān).isbeingdiscussed.(abroad)他將何時出國正在討論之

26、中.inlearningEnglishisenoughpractice.(matter)英語學(xué)習(xí)中最重要的是足夠的練習(xí).worriedherabit.(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空漫步.8.shouldbepunished.(break)任何違法的人都應(yīng)該被懲罰.wecanlearnfourforeignlanguagesatthesametime.(seem)我們能同時學(xué)四門外語似乎不可能.wasthatmorethan90%ofthestudentshadbeenadmittedtothekeyuniversities.讓這所學(xué)校感到自豪的是超過90%的學(xué)生被重點大學(xué)錄取了.主語從句15DDBBB610DDDBD1115DCCDD1620CACDAwillpickhimupwecanfinishtheworkontimeyoulikehim(ornot)h