Nounclauses名词性从句名词性从句在复合句中起名词的作用,其分为：主语从句、宾语从句、表语从句、同位语从句。1、_______________________ismoretime.Whatweneed请你判断以下名词性从句属于哪种？2、Thequestionis______________________________.whetherweshouldaskthemforhelp3、Iknow______________________________.thatyouhavehelpedhim4、Thenews________________________________________________________________istrue.thatMr.Li’ssonhasbeenadmittedtoHongKongUniversity名词性从句的做题思路：缺什么成分补什么成分;什么成分都不缺用that(本身无意义，除宾语从句，一般不能省略。）特点：主从句之间无逗号隔开。一、主语从句(TheSubjectClause)----充当主语的从句：1._____hehadpassedtheexammadehisparentshappy.(A.WhatB.ThatC.\D.Which)B思考：能否把以上句子改为：Itmadehisparentshappy(that)hehadpassedtheexam.3.____isunknown_____shewillcometoday.(A.It;ifB.It;thatC.This,whether;D.That;if)2._____hewillcomeisunknown.(A.ThatB.IfC.WhichD.Whether)D注意：whether,if（是否）：当主语从句放在句首时用whether;如果出现形式主语it，则whether或if皆可引导主语从句。高考模拟\高考体验：1.____the2012OlympicGameswillbeheldinLondonisnolongeraquestion.(A.ThatB./C.IfD.When)A2.(2007年高考全国卷Ⅱ)_____mattersmostinlearningEnglishisenoughpractice.(A.WhatB.WhyC.WhereD.Which)AAItIt的几种形式：的几种形式：1、It+be+adj.\n.+that从句(当表语为：necessary\important\strange\natural等时,主语从句要用虚拟语气，即（should）+V.原形）例：Itisnecessarythathe(should)besentthereatonce.•高考模拟：--WhymustIpractisespeakingEnglishallday?It’ssoboring.--Myboy.It’sveryimportantthatyou___thatforyourfuture.(A.woulddoB.oughtdoC.shoulddoD.needdo)2、It+be+名词词组+that从句It’sapitythatyoudidn’tthinkofthat.3、It’s+be+过去分词+that从句It’ssaid/reportedthattherewillbeastormthisafternoon.4、It+seems/happens/appears+that从句C高考仿真：____wasreported_____Chinahaswon22goldmedalsinthe29thOlympicGames.(A.That;thatB.It;thatC.It,whichD.They;that)B注：“It’s+be+过去分词+that+主语……”句型可改为：“主语（sb./sth.)+过去分词+to+v.”，此句型为常考句型。思考：以上句子可改为Chinawasreported___51goldmedalsinthe29thOlympicGames.(A.towinB.HavingwonC.winningD.tohavewon)D二、表语从句（ThePredicativeClause)按引导词的不同，可分为下面四类：1、由从属连词that,whether等引导。注意：if（是否）不能引导表语从句。Thefactis____wearebehindothergroups.(A.thatB.ifC.whetherD./)Thequestionis____weshouldaskthemforhelp.(A.thatB.ifC.whetherD./)2、由连接代词what,who，which等引导。(1)Chinaisnot___itusedtobe.(A.whatB.thatC.whichD.where)(2)Theproblemis___willstay.(A.whomB.whoC.thatD.where)3、由连接副词where,how,why等引导。ACABHedidn’tworkhard.Thisis____hedidn’tpasstheexam.(A.whyB.becauseC.thatD.what)4、由asthough(if),because等引导Youarebecomingfatter.That’s___youeattoomuch.(A.whyB.becauseC.thatD.what)AB前后构成“因→果”关系，用why。前后构成“果→因”关系，用because。注意：“Thereasonwhy\forwhich…isthat…”为常考的固定句式。Thereason____hedidn’tjoinusinthediscussionis___hecameacrossatrafficjamonhisway.(A.that;thatB.why;becauseC.why;thatD.forwhich;because)C三、宾语从句（TheObjectClause）注意事项：1、whether与ornot直接连用时不能换成if,分开时可以。（1）Idon’tknowwhetherornothewillcome.（2）Idon’tknow____hewillcomeornot.（思考：此空填whether还是if或两者皆可？）2、在动词后whether和if可互换，但在介词后必须用whetherIdon’tcareabout____itwillraintomorrow.(A.whetherB.thatC.ifD./)3、动词不定式之前，表示“是否”...
