资源描述：
《名词性从句之表语,主语,同位语从句.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、PredicativeClauses 表语从句表语从句是在复合句中作表语的名词性从句,放在系动词之后,一般结构是主语+系动词+表语从句可以接表语从句的系动词有be,look,remain,seem等。另外,常用的还有thereasonwhy…isthat…和Itisbecause…等结构。例如：.表语从句：从句在句中充当表语成分，一般放在连系动词之后.作用:对主语进行解释说明。连接词：that/whether/asif/asthough（if不引导表语从句)连接代词：who/whom/whose/which/what连接副词：when/
2、where/why/how/becauseThequestioniswhetherwecanrelyonhim.That’sbecausewewereinneedofmoneyatthattime.Helookedasifhewasgoingtocry.That’swhyIwaslate.注意：在表语从句中，表“是否”时，只能用“whether”不能用“If”。一般情况下，“that”不能省。Itis/wasbecause….Itis/waswhy….3.Thereason(why…/for…)is/wasthat….4Thereaso
3、nisbecause/why…that….名词主语+be+that引起的表语从句在这种句型中，常用表示事实，真理的名词，如：fact,truth或表示看法，观点的名词，如：idea,opinion,belief,view,feeling,suggestion,plan等作主语。如：1.Thefactisthatourteamhaswonthegame.2.Thetruthisthatshewastheverypersonwhoinformedagainstherhusband.注意表语从句的引导词与主语从句和宾语从句相同.但:1.tha
4、t引导表语从句时不能省.2.if不能引导表语从句.1.That’s___thePartycalledonustodo.A.whyB.whatC.howD.that2.Thereasonis___heisunabletooperatethemachine.A.becauseB.whyC.thatD.Whether3.Thatis___theyseparated.A.thatB.whatC.whichD.where4.Janeisnolonger___shewasfouryearsago.A.whatB.whichC.thatD.when1
5、.That’s___thePartycalledonustodo.A.whyB.whatC.howD.that2.Thereasonis___heisunabletooperatethemachine.A.becauseB.whyC.thatD.Whether3.Thatis___theyseparated.A.thatB.whatC.whichD.where4.Janeisnolonger___shewasfouryearsago.A.whatB.whichC.thatD.whenSubjectClauses 主语从句1.主语从句：从
6、句在句中充当主语成分1).Thathewillsucceediscertain.2)Whetherhewillgothereisnotknown.3)Whathesaidisnottrue.4)Wherehehidthemoneyistobefoundout.5)Whoevercomesiswelcome.6)It’scertainthathewillsucceed.7)Howwecanhelpthetwinswillbediscussedatthemeeting.8)Whenthey’llstarttheprojecthasnotbe
7、endecidedyet.考点一:主语从句后置!为了避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语.例:Thatweshallbelateiscertain.--It’scertainthatweshallbelate.1.Thattheearthisroundisknowntoall.--2.Thatyoumissedthechanceisapity.--由连词whether,连接代词what,who,which和连接副词when,where,why,how等引导.也常常后置:Itisapitythat
8、youmissedthechance.It’sknowntoallthattheearthisround.It的用法：（形式主语）It’possible/important/necessary/clear…
