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1、主語(yǔ)從句作句子主語(yǔ)的從句叫主語(yǔ)從句避免句子頭重腳輕，常用句型如下：Whetherhewillcomeornotisnotknown.他來(lái)不來(lái)還不清楚(1)It+be+名詞+that從句ItisstillamysterywhatcausedtheaccidentWhathewantstotellusisnotclear.他要跟我們說(shuō)什么，還不清楚(2)It+be+形容詞+that從句Itiscertainthathewillwinthematch.Itistruethathehasmadeaveryimportantdiscoveryinchemistry.Whowillwinthemat
2、chisstillunknown.誰(shuí)能贏得這場(chǎng)比賽還不得而知。ItisstrangethatheshoulddothatItisverylikelythattheywillholdameeting.Itisknowntoushowhebecameawriter我們都知道他是如何成為一名作家的。Itisimportantthatweallshouldattendthemeeting-Itisstrangethatthemanshouldhavestucktohissillyideas.WheretheEnglisheveningwillbeheldhasnotyetbeenannounce
3、d.英語(yǔ)晚會(huì)將在哪里舉行，還沒(méi)有宣布。It+be+動(dòng)詞的過(guò)去分詞+that從句ItissaidthathehasgonetoshanghaLThatheislateforschoolmakestheteacherveryangry.他上學(xué)遲到讓老師很生氣ItisknowntoallthatthegunpowderwasfirstinventedbytheChinese.Itissuggestedthatthework(should)bedonewithgreatcare.注意：在主語(yǔ)從句中用來(lái)表示驚奇、不相信、惋惜、理應(yīng)如此等語(yǔ)氣時(shí)，謂語(yǔ)動(dòng)詞要用虛擬語(yǔ)氣“Ghould)+do，，，常用的
4、句型有：Itisnecessary(important,natural,strange,etc.)that+(should)+doItissuggested(requested,proposed,desired,etc.)that+(should)+do主語(yǔ)從句的時(shí)態(tài)：不受主句的時(shí)態(tài)影響和限制。(1)Whetherwewillgoforanoutingtomorrowremainsunknown.(2)Whowillbeourmonitorhasn'tbeendecidedyet.(3)Whomvvemuststudyforisaquestionofgreatimportance*(4)
5、Whatcausedtheaccidentremainsunknown.(5)Whateveryoudidisright(6)Whothewatchbelongstowaslostisunknown.四.賓語(yǔ)從句1.定義：名詞句用作賓語(yǔ)的從句叫賓語(yǔ)從句。2.由連接詞that引導(dǎo)賓語(yǔ)從句時(shí)，that在句屮不擔(dān)任任何成分，在口語(yǔ)或非正式的文體中常被省去，但如從句是并列句時(shí)，第二個(gè)分句前的that不可省。例如：HehastoldmethathewillgotoShanghaitomorrow.他已經(jīng)告訴我他明天要去上海。Wemustneverthink(that)wearegoodinever
6、ythingwhileothersaregoodinnothing.我們決不能認(rèn)為口己什么都好，別人什么都不好。Weallthink(that)sheisworkinghardandthatshewillsurelygotoaverygooduniversity.我們都認(rèn)為她學(xué)習(xí)非常努力，一定能進(jìn)一個(gè)非常好的大學(xué)。3?在demand、order>suggest>decide>insist,desire,request，command等表示要求、命令、建議、決定等意義的動(dòng)詞后，賓語(yǔ)從句常用“(should)+動(dòng)詞原形叫例如:Iinsistthatshe(should)doherworkal
7、one.我堅(jiān)持耍她Cl己工作。Thecommanderorderedthattroops(should)setoffatonce.司令員命令部隊(duì)馬上出發(fā)。4.可運(yùn)用形式賓語(yǔ)it代替的賓語(yǔ)從句①動(dòng)詞find,feel,consider,make,believe等后面有賓語(yǔ)補(bǔ)足語(yǔ)的時(shí)候，則需要用it做形式賓語(yǔ)而將that賓語(yǔ)從句后置.Ithinkitnecessarythatwetakeplentyofhotwatereveryday.
