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1、名词性从句讲练名词往往在句中充当主语,宾语,表语和同位语。在复合句中,代替名词充当主语,宾语,表语和同位语的句子统称为名词性从句。名词性从句分为:主语从句、宾语从句、表语从句、同位语从句。(一)引导名词性从句的连接词引导名词性从句的连接词可分为五类:a.连词:that(无任何词意,不作成分,只起连接作用,宾语从句中常可省略)1)Myhopeisthatshewillsoonbewellagain.(表语从句)我的希望是她能很快康复。2)Everybodyhopesthatshewillsoonbewellagain.(宾语从句)
2、大家都希望她能很快康复。3)Thatshewillsoonbewellagainisourhope.(主语从句)她能很快康复是我们的希望。b.whether,if(均表示“是否”表明从句内容的不确定性,不作成分)1)Whetherheiscomingornotdoesn’tmattertoomuch.(主语从句,不能用if)2)Iwentinandaskedif/whethertheyhadacheapsuit.3)Iwonderwhether/ifhewillcomeinsuchbadweather.c.连接代词:what,w
3、hatever,which,whichever,(在从句中作主语,宾语,表语,指物)1)____heneedismoretime.显然,主语从句:he是主语,谓语动词need缺宾语,因此应填what.2)Tellus___yousawandheardduringyourvisittothatuniversity.3)Thisisnot___Iwant.4)____somepeopleareagainstis___otherpeoplearefor.5)Thequestioniswhichteamwillwin.6)Ihavetw
4、oapples,Idon’tknowwhichyouwant.归纳:what一般用于不知道内容或范围的句子;which“哪一个……”一般用于给出内容或范围的句子。可作主语,宾语,表语,还可作定语。d.who,whoever,whom,whomever,whose(在从句中作主语,宾语,表语,定语,指人)1)Whowillgiveusalectureisunknown.2)Thequestioniswhowillcomehere.e.连接副词:when,where,how,why,whenever,however,wherever
5、(在从句中作状语)1)Ihavenoideahowhelearnedaboutit.2)Whereshehasgoneisnotknownyet.3)Whenhewillstartisnotknownyet.4)Thisiswhyheislate.注意:连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。二)具体分类一)主语从句在复合句中作主语的从句叫主语从句。1)Thatyouareleavingisapity.你要走,真遗憾。2)Whetherthefootballgamewillbeplay
6、eddependsontheweather.足球比赛是否举行将视天气而定。3)Whathewantstotellusisnotclear.他要跟我们说什么,还不清楚。4)Whowillwinthematchisstillunknown.谁能赢得这场比赛还不得而知。5)WheretheEnglisheveningwillbeheldhasnotyetbeenannounced.英语晚会将在哪里举行,还没有宣布。6)Itisknowntoushowhebecameawriter.我们都知道他是如何成为一名作家的。有时为避免句子头重脚
7、轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下:(1)It+be+名词+that从句①It’sapitythatwecan’tgo.很遗憾我们不能去。②ItisafactthatEnglishisbeingacceptedasaninternationallanguage.9用心爱心专心英语正在被人们接受为国际语言,这是事实。③Itisnowonderthatheisnothungry;hehasbeeneatingsweetsallday.难怪他不饿,
8、他整天在吃糖果。(2)It+be+形容词+that从句①Itiscertainthatshewilldowellintheexam.毫无疑问她考试成绩会很好。②Itisprobablethathetoldhereverything.很可能他把一切都告诉她了。③I