主语从句精讲精练

名词性从句之主语从句与同位语从句识别名词性从句和说出每种从句的判断方法；归纳总结主语从句的常考点；区分定语从句和同位语从句；准确使用名词性从句的引导词并可以用名词性从句翻译句子。LearningAims

名词性从句类型Nounclauses

主语从句subjectclause

宾语从句objectclause

表语从句predicativeclause

同位语从句appositiveclause

纵观近几年的高考，对名词性从句的考查主要集中在以下题型：1.完形填空2.语法填空3.短文改错4.写作运用（高级句型）高考命题规律（2014全国高考

）Itisbynomeansclear24thepresidentcandotoendthestrike.(what)一.宾语从句的位置1.及物动词之后.Theteachersaidthatlighttravelsmuchfasterthansound.2.介词之后.IworryaboutwhetherIhurtherfeelings.3.系表之后.Iamsurethathecanhelpme.

4.句末，前有it作形式宾语.Weconsideritpossiblethatheisill.自主探究二.表语从句的位置系动词之后ThetruthisthatIhaveneverbeenthere.Itlooksasifitisgoingtorain.常跟表语从句的系动词：be,seem,appear,look,sound,remain…自主探究三.主语从句的位置1.句首，谓语动词之前。Whatweneedisyourhelp.Whoeverbreaktherulewillbepunished.2.句末，前有it做形式主语。ItisobviousthatIamhappy.自主探究四.同位语从句的位置名词之后，解释说明名词的内容Weallknowthetruththattheearthgoesroundthesun.Ihavenoideawhenshewillbeback.自主探究主语从句之考点探究

★考点一、

主语从句的语序

★考点二、

主语从句的主谓一致

★考点三、

主语从句的引导词

★考点四、it作形式主语考点一、

主语从句的语序Whenwillhecomeisnotknown.Whenhewillcomeisnotknown.主语从句一律用

！！×陈述语序Whoeversaysthisiswrong．但what引导的主语从句谓语动词用单数还是复数，，要视句子的意义而定。

WhatIneed_____money.WhatIneed_______books.考点二、

主语从句的主谓一致Whenandwherewe’llholdthemeeting_____notbeendecidedyet.主语从句作主语，谓语一般用单数isarehas考点三、

主语从句的引导词连接词：that、if、

whether不作成分无意义2.连接代词

：who、whom、whose、what、

which、whoever、whichever、whatever、whomever3.连接副词：when、where、why、how“是否”if不用句首作状语有意义作成分(主，宾，表，定）有意义1.Thattheyarebadlyinneedofhelpisquiteclear.2.Whetheritistrueremainsaproblem.3.Whichstudentwillwinisuncertain.

4.Whowilltakepartinthemeetinghasnotbeendecided.5.Whoevermakesmistakesmustcorrectthem.连接作用是否定语主语主语考点三、

主语从句的引导词6.Whatmanyscientistsbelieveisthattheearthisround.7.Whateverwassaidheremustbekeptsecret.8.Wherewelivedoesn’tmatter.9.Howthepyramidswerebuiltwasstillamystery.宾语主语状语状语考点三、

主语从句的引导词

Note:连接词that与what

的区别Whathesaidmakesmehappy.Thatanewteacherwillcomeistrue.that

只起连接作用，无意义，在从句中不充当任何成分。

what

既起连接作用,又在从句中作主语,宾语,

表语。请你归纳1.______hetalkedaboutinhisarticlewasunknowntothereaders.2._________Igotoworkaftergraduatingdependsonsomespecificsituations.3.________canbethelastwinnerisstillamystery.4._________wewillgotoQinghaiLakeisuptoyou.5._________theearthturnsaroundthesunisknowntoall.6._________breaksthewindowwillbepunished.随学随练WhatWhereWhoWhenThatWhoever做题三步曲：

步骤一：首先分清主句和从句。步骤二：分析从句缺何种成分。步骤三：根据分析，选择恰当的连接词突破方法

1.That

hewillrefusethispieceofadviceisimpossible.______________________________________________________________________________2.Thattheyshouldlikeeachotherisnatural._____________________________________*it为形式主语Itisnaturalthattheyshouldlikeeachother.Itisimpossiblethathewillrefusethispieceofadvice.考点四、it作形式主语

这样就构成了下面一些常用句型:

1)Itis+n.+从句

Itisapity/awonder/aquestion/nowonderthat…

*_______________(很遗憾)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat2)Itis+adj.+从句

Itistrue/clear/well-known/likely/obvious/impossible/possiblethat…

*_________________(很可能)shewillcomebacktomorrow.*_________________(很明显)thismeasureiseffective.ItispossiblethatItisobviousthat3)It+be+过去分词+从句

Itissaid/reported/believed/expected/thought/hopedthat…

*___________________(据报道)20peoplewerekilledintheaccident.*______________________(建议)weshouldeatmorevegetableanddomoreexercise.ItisreportedthatItissuggestedthat4)It+不及物动词+从句

Ithappenedthat...碰巧……

Itoccurredtomethat…我突然想起…*________________(刚好)Icameintotheofficeatthattime.*____________________(我突然想起)Iforgettosenttheletter.IthappenedthatItoccurredtomethat注意：Whatyouleftareonlyseveraloldbooks.Whatyousaidisofgreatimportance.

1.“if”不能在句首引导主语从句，应有“whether”引导。3.主语从句的“that”一般不能省。4.“what”引导主语从句时，谓语动词：常与其后的名词作表语一致主语从句需注意的问题2.主语从句中用陈述语序

Ihavenoideawhenhewillcomeback.

可以跟同位语从句的名词主要是抽象名词，

通常有：news，idea，fact，promise，question，doubt，thought，hope，message，suggestion，word（消息）,possibility等。同位语从句之考点探究Thenewsthathetoldmeistrue.Thenewsthatourteamhaswonistrue.同位语从句定语从句同位语从句●定语从句判断下列各句是同位语从句还是定语从句1.TheyexpressedthehopethattheywouldcometovisitChinaagain.2.

ThehopethatsheexpressedisthattheywouldcometovisitChinaagain.

3.Thefactthatsheworkshardiswellknowntousall.同位语从句定语从句同位语从句小试牛刀下列各句中均有一处错误，请改正：1.Itisimportantthatwewillfinishtheworkontime.2.Ifhecanfinishhistaskontimeisofgreatimportance.3.Thatshewantstoknowiswhenthepartywillbeheld.shouldWhetherWhat小试牛刀4.Whenthemeetingwillbeheldhaven'tbeenknownyet.5.Youhavemadeamistakeisafact.hasn'tThatyou2.用适当的连接词填空，使句子意思完整：1.____hedidn'tattendthemeetingyesterdaywasn'tquiteclear.2._________teamwillwinthematchisstillunknown.3.__________comestothepartywillreceiveapresent.4._________hesolvedtheproblemsuccessfullyinterestedallofus.