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1、名词性从句讲解在复合句中起名词作用的从句叫做名词性从句。它包括主语从句、宾语从句、表语从句和同位语从句。一、名词性从句主语从句、表语从句、宾语从句、同位语从句,在整个句子中所起的作用,相当于一个名词。因此,这四种从句通称为名词性从句。引导名词性从句的连接词可分为三类: 连接词:that,whether,if(不充当从句的任何成分) 连接代词:what,whatever,who,whoever,whom,whose,which. 连接副词:when,where,how,why1.主语从句(两种结构,三类连接词)两种结构1.主
2、语从句位于句首:Whathewantsisabook.Whokeptthedooropenallnightwasunknown.2.主语从句位于句尾,it作形式主语。(1)It+be+名词+that从句It’sapitythatwecan’tgo.It’snosurprisethatourteamshouldhavewonthegame.(2)It+be+形容词+that从句.Itseemsobviousthatwecannotgoonlikethis.(3)It+be+动词的过去分词+that从句Itisknowntoallt
3、hatlighttravelsinstraightlines.ItisreportedthatChinahassentanotherman-madeearthsatelliteintoorbit.(4)It+不及物动词+that从句注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时,谓语动词要用虚拟语气“(should)+do”,常用的句型有:Itisnecessary(important,natural,strange,etc.)that…Itisapity(ashame,nowonder,etc.)that…Iti
4、ssuggested(requested,proposed,desired,etc.)that…三类连接词:1.连词thatwhetherthat引导的主语从句:引导词that无含义,在句中不做成分,不可以省。whether引导的主语从句:whether有含义(是否),在句中不做成分,不可以省。Thatyouwillwinthemedalseemsunlikely.Thatshesurvivedtheaccidentisamiracle.Whethersheiscomingornotdoesn’tmattertoomuch.2.
5、连接代词who,whose,whom,which,what,whoever,whomever,whichever,whatever引导的名词性从句中,其连接代词在句中起名词性作用,担当一定成分.Whatyouneedismorepractice.WhatIwanttoknowisthis.Whateverwedoistoservethepeople.3.连接副词when,where,why,how引导的名词性从句(其连接副词有含义,在句中作状语。)Whereweshouldleaveitisaproblem.6Whentheyw
6、illcomehasn’tbeenmadepubic.WheretheEnglisheveningwillbeheldhasnotyetbeenannounced.练习1.hashelpedtosavethedrowninggirlisworthpraising.A.WhoB.TheoneC.AnyoneD.Whoever2.Itwashesaiddisappointedme.A.what;thatB.that;thatC.what;whatD.that;what3.we’llgocampingtomorrowdependson
7、theweather.A.IfB.WhetherC.ThatD.Where4.hesaidatthemeetingsurprisedeverybodypresent.A.WhatB.ThatC.ThefactD.Thematter5._______hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD.How6.Itisnecessarythatacollegestudent_______atleastaforeignlanguage.A.mastersB.sh
8、ouldmasterC.masteredD.willmaster7.WhatIsayandthink___noneofyourbusiness.A.isB.areC.hasDhave8._______isafactthatEnglishisbeingaccept