高中語(yǔ)法主語(yǔ)從句 詳解 (4份)

精美文檔精美文檔主語(yǔ)從句N(xiāo)ounclausesasthesubject主語(yǔ)從句如果一個(gè)句子在復(fù)合句中充當(dāng)一個(gè)主語(yǔ),那么這個(gè)句子就是主語(yǔ)從句。Thathefinishedwritingthecompositioninsuchashorttimesurprisedusall.Whatweneedaregooddoctors.Whomwemuststudyforisaquestionofgreatimportance.主語(yǔ)從句的連接詞.連接詞:that,whether.Thathewillwiniscertain..Whetherhe'lljoinusinthediscussionisofgreatimportance..連接代詞:who,what,which,whom,whose,whoever,whatever,whichever.Itisclearwhoisafraidofhavingachangeinlandownership..WhatIndianeedsisalawtomakelandownershipfairer..連接副詞:when,where,why,how,howmany,howmuch,howlong,howsoon,howoftenWhenwe'llstarttomorrowwillbetoldsoon.Wherewecanbuyoxenissomethingweneedtofindout.Whyhecamehereisnotknown.Howwecanprotectthegrainfromdampneedstobediscussed.【連接詞】thatThattheearthmovesaroundthesuniswellknown.whetherWhetherhewillcomeornotisnotknownyet.whoWhowillbesenttherehasnotbeendecided.whatWhatyouneedismorepractice.whichWhichoneisthebestisnotclear.when,whereWherehehasgoneisaquestion.why,howWhythereisgravityishardtounderstand.HowhecanearnalivinginBritainremainsabigproblem.whoever、whatever、whichever可引導(dǎo)主語(yǔ)從句。Whoevercomeswillbewelcome.Whateverhedidwasright.Whicheverofyoucomesinwillreceiveaprize.【小結(jié)】引導(dǎo)主語(yǔ)從句連詞有that,whether,who,what,whatever等。連詞位于句首不能省略。主語(yǔ)從句大多數(shù)情況下視為第三人稱(chēng)單數(shù)，但在連接代詞what引導(dǎo)的主語(yǔ)從句后謂語(yǔ)動(dòng)詞的數(shù)要根據(jù)句意而定?！餅榱朔乐咕渥宇^重腳輕，通常把形式主語(yǔ)it放在主語(yǔ)位置，真正主語(yǔ)后置。Itiscertainthathewillwinthematch.Itisthaehehasmadeaveryimportantdiscoveryinchemistry.ItisveryIthatltheywillholdameeting.Itisstrtilngtethemanshouldhavestucktohissillyideas.Itisapiatwewon'tbeabletogotothesouthtospendoursummervacation.Itisstillarnhsitecyusedtheaccident.ItisthathehasgonetoShanghai.Itseenthaihehasseenthefilm.【小結(jié)】1?以that引出的主語(yǔ)從句,常以形式主語(yǔ)it引導(dǎo)，結(jié)構(gòu)為：Itis形容詞/名詞凜些動(dòng)詞ed+that從句。在有些that從句中要用虛擬語(yǔ)氣should+do/should+havedohe★用it作形式主語(yǔ)的結(jié)構(gòu)Iti＋s名詞＋從句Itisafact?that事實(shí)是…Itisanhonorthat…非常榮幸Itiscommonknowledgethat??是常識(shí)Itife形容詞+從句Itisnatural?that很自然…Itisstrange??that奇怪的是…11+不及物動(dòng)詞+從句Itseemsthat似乎…Ithappenedthat召碰巧…?Itappearsthat似乎…Itfebe+過(guò)去分詞+從句Itisreported?that據(jù)報(bào)道…Ithasbeenproved…h(huán)at已證實(shí)…Itissaid…h(huán)at據(jù)說(shuō)…★“If作形式主語(yǔ)代替主語(yǔ)從句的常見(jiàn)句型舉例①I(mǎi)t's+adj.+tha-/lwhsee.g.It'cslear/natural/cetrhtaatinclauseIt'sobviousthatmoneydoesn'tgrowontrees.②It's+p.p.+that/-whlausee.g.It'ssaid/reported/knownthatclauseIt'sbelievedthathewillcomenextweek.It‘s+n.+that/ladnsee.g.It'sashame/anhonour/goodnecwlsautsheatIt'sstillaquestionwhenhawve'olulrmeeting.It+v.(n./pron.)that/wh-clausee.g.Itmadeusveryhappythatshewaschosen.Itappearsthatheforgottosigntheletter.精美文檔2★whether與if均為“是否”，但下列情況下只用whether：引導(dǎo)主語(yǔ)從句并在句首Whetherhewillcomeisnotclear.引導(dǎo)表語(yǔ)從句Thequestioniswhetherhe'llcome.whether從句作介詞賓語(yǔ)I'mnotsureaboutwhetherwe'llwin.引導(dǎo)讓步狀語(yǔ)從句時(shí)Whetheryoulikeitornot,you'llhavetodoit.【注意事項(xiàng)】主語(yǔ)從句位于句首時(shí)必須由連接詞引導(dǎo)主語(yǔ)從句后置時(shí)引導(dǎo)詞that可省略。主語(yǔ)從句位于句首時(shí),不能用if引導(dǎo)。主語(yǔ)從句后置時(shí)，可以用if引導(dǎo)。練一練1ornotisstilluncertain.A.He'scomingB.IfheiscomingC.ThatcomingD.Whetherhe'scoming2.It'she'llbeabletocome.A.doubt,whetherB.doubtfulC.doubtitD.doubtfulwhether3.Itisthatthebridgehasexistedformorethanthreecenturies.A.appearedB.risenC.saidD.bornhesawbothsurprisedandfrightenedhim.A.ThatB.WhenC.WhatD.Whichisapitythatheshouldfeelsoupset.A.WhatB.ThatC.HeD.ItUsethewordsbelowtofillintheb