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1、Unit1Alandofdiversity名词性从句名词性从句在句子中起名词作用的句子叫名词从句(NounClauses）。名词从句的功能相当于名词词组,它在复合句中能担任主语、宾语(含介词宾语)、表语、同位语等.名词从句主语从句(SubjectClause)、宾语从句(ObjectClause)、表语从句(PredicativeClause)同位语从句(AppositiveClause)Whowillwinthematchisstillunknown.Iwanttoknowwhathehastoldyou.Thefactisthatwehavelostth
2、egame.Thenewsthatwewonthegameisexciting.主语从句宾语从句表语从句同位语从句主语从句：一个句子在复合句中充当主语。引导词有连词that(不可省),whether;代词有who(ever),what(ever),which(ever),whom,whose;副词when,where,how,why等.如:1.Thatheisafamoussingerisknowntous.2.WhenhewillgotoAmericaisnotyetfixed.3.Whosebagitiscan`tbetold.4.Whateveryou
3、saidisallright.1.引导主语从句的连词that在句中是不充当成分不可省略。Thattheearthisroundistrue2.表示“是否”意义时，一般用whether而不用if引导主语从句，Whethershewillcomeornotisstillaquestion.但如果有形式主语it引导时，既可用whether，也可用if。e.g.Itisstillaquestionifshewillcome.3.主语从句大多数情况下视为单三Whateveryoudid___(is/are)right.Attentionis4.主语从句在复合句中作主语
4、,它可以位于句首,但常见的主语从句多放在句末,句首则用形式主语it。Thattheearthisroundistrue.=Itistruethattheearthisround.主语从句的用法2.Whetherhewillcomehasn’tbeendecided.=Ithasn’tbeendecidedwhetherhewillcome.注意:连词that,whether在从句中不担任句子成分,只起连接作用,不能省略用it作形式主语的结构(1)Itis＋名词＋从句Itisafactthat…事实是…Itisanhonorthat…非常荣幸Itiscommo
5、nknowledgethat…是常识(2)Itis＋形容词＋从句(多用should)Itisnaturalthat…很自然…Itisstrangethat…奇怪的是…(3)It＋不及物动词＋从句Itseemsthat…似乎…Ithappenedthat…碰巧…Itappearsthat…似乎…Itoccurstosb.that….突然想起….(4)Itis＋过去分词＋从句Itisreportedthat…据报道…Ithasbeenprovedthat…已证实…Itissaidthat…据说…Itiscertainthathewillcome.Itissaid
6、thatsomeAmericanfriendswillvisitourschoolnextweek.Ithappenedthatwewereoutforawalkyesterdayevening.Itdoesn’tmatterwhetherIstayornot.what与that在引导主语从句时的区别what引导主语从句时在从句中充当句子成分,如主语、宾语、表语,而that则不然,即不担任成分。例如：Whatyousaidyesterdayisright.Thatsheisstillaliveisaconsolation.1.____youdon’tlike
7、himisnoneofmybusiness.A.WhatB.WhoC.ThatD.Whether2.____hesaidatthemeetingastonishedeverybodypresent.A.WhatB.ThatC.ThefactD.Thematter练一练！3.____leavestheroomlastoughttoturnoffthelights.A.Anyone B.ThepersonC.Whoever D.Who4._____thesportsmeetwillbehelddependsontheweather.A.WheneverB.IfC
8、.WhetherD.That5.___isafact
