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1、名词性从句什么是名词性从句？↓以what为例，看看以下各句中其分别引导哪种名词性从句：Whatweneedismoretime.Theyhavedonewhattheycantohelpme.ThatiswhatIwanttotellyou.YouhavenoideawhatIamsuffering.引导主语从句引导宾语从句引导表语从句引导同位语从句引导名词性从句的连接词可分为三类：（不做任何成分）从属连词：that,whether,if（做主，宾，表）连接代词：what,whatever,who,whoever,whom,whose,w
2、hich，…（做状语）连接副词：when,where,how,why….主语从句作句子主语的从句叫主语从句,一般有三种结构：1.that引导的主语从句（1）that位于句首的主语从句e.g.Thatshewillwinthematchiscertain.（2）形式主语it替代主语从句It+系动词+形容词+that从句right,likely,wrong,clear,certain,obvious…Itis/wasnecessary/important/strange/natural+that从句中，从句用shoulddo,should可省
3、略。e.g.ItisimportantthatwelearnEnglishwell.It+系动词+名词+that从句apity,afact,ashame,nowonder,nosurprisee.g.Itisapitythathemissedthetrain.It+be+过去分词+that从句e.g.Itissaidthatourschoolwillholdasportsmeeting在It+be+suggested/advised/ordered/requested/required+从句中，从用shoulddo,should可省(3)
4、.It+特殊动词+that从句seem看上去，happen碰巧，appear显得matter有影响IthappenedtomethatIhadhadbeenawaywhenhecalled.2.if/whether引导的主语从句e.g.Whethertheworkcanbecompletedontimeisdoubtful.Itisdoubtfulwhethertheworkcanbecompletedontime.（if引导的主语从句不能位于句首）3.wh-类连接词引导主语从句连接代词：what,whatever,who,whoever
5、,whom,whose,which，whichever….连接副词：when,where,how,why….e.g.WhenhewillleavefortheUnitedStatesisnotdecidedyet.Whatweneedismorepractice.parentssayanddohasalife-longeffectontheirchildren.A.ThatB.WhichC.WhatD.As_____hefinishedtheworkinsuchashorttimesurprisedusall. A.ThatB.WhatC
6、.WhichD.WhenCA表语从句在从句中作表语的从句。1.连接词：（1）从属连词引导：that,whether,不做成分e.g.Thequestioniswhetherweshouldhelphim.Thetroubleisthathehasneverdonetheworkbefore.（2）.连接代词引导：whowhomwhosewhatwhichwhoeverwhomeverwhoseverwhateverwhichevere.g.Whatshewantstoknowiswhichdresssheshouldbuy.（3）连接副词
7、引导：when,why,where,how,whenever,wherever….e.g.Thatiswhyhedidn’tpasstheexam.2.其他连系动词+表从seem,look,sound,feel,remain,taste等e.g.Itlooksasifitisgoingtorain.宾语从句在句子中起宾语作用的句子叫宾语从句。宾语从句有三类：动词的宾从，介词的宾从，形容词的宾从。1.动词的宾语从句：e.g.Iwonderifyoucanhelpme.DoyouknowwhenhewillleaveforHongKong?使
8、用形式宾语it的宾从：find,feel,think,consider,make,believe等动词后多用it形式宾语结构及物动词+it+宾语补足语+that从句Ihavemadeitaru
