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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，
2、三类连接词）两种结构1.主语从句位于句首：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
3、分词+that从句Itisknowntoallthatlighttravelsinstraightlines.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…Itis
4、apity(ashame,nowonder,etc.)that…Itissuggested(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.
5、Whethersheiscomingornotdoesn’tmattertoomuch.2.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
6、连接副..下载可编辑....词有含义,在句中作状语。)Whereweshouldleaveitisaproblem.Whentheywillcomehasn’tbeenmadepubic.WheretheEnglisheveningwillbeheldhasnotyetbeenannounced.练习1.hashelpedtosavethedrowninggirlisworthpraising.A.WhoB.TheoneC.AnyoneD.Whoever2.Itwashesaiddisappointedme
7、.A.what;thatB.that;thatC.what;whatD.that;what3.we’llgocampingtomorrowdependsontheweather.A.IfB.WhetherC.ThatD.Where4.hesaidatthemeetingsurprisedeverybodypresent.A.WhatB.ThatC.ThefactD.Thematter5._______hemadeanimportantspeechatthemeetingwastrue.A.ThatB.Why
8、C.WhatD.How6.Itisnecessarythatacollegestudent_______atleastaforeignlanguage.A.mastersB.shouldmasterC.masteredD.willmaster7.WhatIsayandthink___noneofyourbusiness.A.isB.areC.hasDhave8._______isafactthatEnglishi
