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1、名词性从句nounclause主语从句subjectclause宾语从句objectclause表语从句predicativeclause同位语从句appositiveclause谓语之前谓语之后系动词之后名词之后Unit4主语从句SubjectClauseRevisionFindthesubjectsinthefollowingsentences.1.Atreehasfallenacrosstheroad.2.Youareastudent.3.Tofindyourwaycanbeaproblem.4.Smokin
2、gisharmfultoyou.5.Whatshesaidisnotyetknown.6.Thatweshallbelateiscertain.7.It’scertainthatweshallbelate.主语从句在句中充当主语的从句叫做主语从句。1.Thathewillcomeiscertain.2.Whethertheplanwillbecarriedoutisstillunknown.3.Whattheschoolneedsmucharebooks.4.Whichsidewillwinisnotclear.5
3、.Whyhediditremainsamystery.6.Whentheywillstartisnotknownyet.7.Howhebecameagreatscientistisknowntousall.8.Whowilltakepartinthemeetinghasnotbeendecided.9.Whoeverbreaksthelawwillbepunished.10.Wheresheisfromisunknown.Findthesubjectclausesinthefollowingsentences.名词
4、性从句的引导词：1.that（无意义，不可省，不充当任何成分）2.whether/(if)（均表示“是否”表明从句内容的不确定性,不可省）3.连接代词：what,whatever,who,whoever,whom,whomever,whose,which,whichever4.连接副词：when,where,how,why,whenever,wherever,however依据“缺什么补什么”原则确定正确的连词。所谓“缺什么补什么”是指句型结构与连词之间的关系。如果句子中缺主语，指人用who，指物用what；如缺宾
5、语，指人用whom，指物用what；如缺时间状语用when；地点状语用where；原因状语用why；方式状语用how；定语用what或which；什么都不缺用that。Wherehewillgoisunknown.Whatyousaidyesterdayisright.ThatheknowsJapaneseisknowntoall.Whetherheiscomingdoesn’tmattermuch.缺地点状语缺宾语什么都不缺，句子完整意思为“是否”，起连接作用Completethesentencesusingwh
6、at,whether,where,when，who,why,howorthat.1.(_____isneededforsuccess)isyourhardwork.3.(_____thetreeswillbeplanted)hasnotbeendecided.2.(______wewillhaveameeting)isanimportantquestion.4.(_canjoininthesportsmeeting)isdecidedbytheteacher.5.(________itwillrainornot)i
7、snotclear.7.(___hemadeaspeechatthemeeting)wastrue.WhatWhen/Where/WhetherWhere/Whether/WhenWhoWhetherThat6.(____theearthisbecomingwarm)isagoodtopicforresearch.Why单一主语从句作主语时，谓语动词用形式。Conclusion:单数注意：Whatyouleftareonlyseveraloldbooks.2.WhatIneedismoretime.2.主语从句的“
8、that”不能省。3.“what”引导主语从句时，谓语动词：1）常与其后的名词作表语一致2）根据句子的语境而定。主语从句需注意的问题1.主语从句中用陈述语序1.____mattersmostinlearningEnglishisenoughpractice.(2007全国卷Ⅱ)A.WhatB.WhyC.WhereD.Which高考链接2.____we’llg
