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1、Nounclausesas thesubject主语从句Conjunctions(关联词)从属连词(不作成分）连接代词（作成分）连接副词（作状语）what,who,which,whatever,whoeverthat,whether,when,where,why,how1.————————————iscertain.（我们将迟到了）2.________________________isknowntoall.(地球是圆的)3.________________________isapity(你错过了这次机会)ThattheearthisroundThatyoumissedthecha
2、nce二whether是否，表不确定的事情.Thatweshallbelate————————hurtshimsomuch.（她离开他）一.that_---只起引导作用，不充当成分，但不能省略。没有意义。1).Thatshelefthim__________________________isnoteasytosay(他是否会来这）2)Whetherhewillcomehere(Ifhewillcomehere...)×3)_____________ismorepractice.(我们所需要的）what在从句中作主语。4）————————————————isunderdiscuss
3、ion.When在从句中作状语WhatweneedWhenwewillbeginthemeeting“if”不能引导主语从句三。其他疑问词一、位于句首的主语从句Whowilldoit____beendecided(have/has)Whatheneeds__thatbook.Whatheneeds__somebooks.√isare2.单个主语从句作主语，谓语动词用单数形式。两个（或两个以上）谓语动词用复数形式。Whereandwhenhewasborn____notbeenfound.(2)Whenthepersonwasmurderedandwhyhewasmurdered__
4、__unknown.has1.主语从句中，谓语动词一般用单数注意What引导的主语从句，可根据表语决定are(1)Itis＋名词＋从句Itisafactthat…事实是…apity/agoodidea/anhonour/amystery/apleasurecommonknowledge(常识)nowonder(难怪)(2)Itis＋形容词＋从句Itisnaturalthat…很自然…Itislikelythat…很有可能…obvious/unknown/certain二、it作形式主语的主语从句注意：如果形容词是important,necessary,strange,natural
5、等词时，从句使用 虚拟语气（should+V.）。1.ItisimportantthatyoushouldlearnEnglishwell.2.真奇怪你竟然喜欢上他。Itisstrangethatyoushouldlikehim.(3)It＋过去分词＋从句Itisreportedthat…据报道…Ithasbeenprovedthat…已证实…Itissaidthat…据说…注意：如果过去分词是“坚持,命令,建议,要求”等词时，从句使用虚拟语气 （should+V.）。★建议他应该卧床休息。Itissuggestedthatyou________inbed.shouldstay(4
6、)It＋不及物动词＋从句Itseems/appearsthat…似乎…Ithappenedthat…碰巧…注意：what与that在引导主语从句时的区别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。1)Whatyousaidyesterdayisright.2)Thatsheisstillaliveisasurprise.WhateverandwhoeverWhatever=anythingthatWhoever=anyonewho不管是谁犯了法,他都应该受到惩罚。Whoeverbreaksthelawshouldbepunished.An
7、yonewhobreaksthelawshouldbepunished.【即学即练】____hereferredtoinhisarticlewasunknowntothegeneralreader.A.ThatB.WhatC.WhetherD.Where2.___Ihavewillbeyourssoonerorlater.A.NomatterwhatB.NomatterwhateverC.WhateverD.ThatBC3.____wewillholdthesport
