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主语从句讲解
一、概述在句中起名词作用的各种从句,统称为名词性从句依据它们在句中的语法作用,这类从句又可分为主语从句、宾语从句、表语从句和同位语从句在主从复合句中,充当主语的从句叫做主语从句
①How theearth cameinto existenceremains a mystery to us.地球是如何形成的对我们来说仍旧是一个谜
②It worriedthe womanthat herson was always playingputer games.儿子始终在玩电脑嬉戏,这让这位女士很担忧二引导主语从句的连接词引导主语从句的连接词有三类附属连词、连接代词和连接副词
1.附属连词that和whether/if1that引导的主语从句
①That myparents alwaystreat measalittle childmakes mevery unhappy.我的父母总是像对待小孩子那样对我,这让我很不快乐
②That thecollege will take inmore newstudents thisyear is true.今年这所高校将招收更多新生是真的2whether/if引导的主语从句DWhether hecan finishhis taskon timeis ofgreat importance.他是否能按时完成他的任务特别重要
②Whether thesports meetingwill beheld isnot certainnow.运动会是否会进行现在还不确定【温馨提示】lthat在名词性从句中不充当任何成分,无词义,只起连接作用,宾语从句中的that有时可省略2whether在从句中不充当任何成分,起连接作用,意为“是否〃,不行省略
2.连接代词引导主语从句连接代词引导主语从句,在从句中可以作主语、宾语、表语或定语常见的连接代词有who,whose,whom,what,which,whoever,whomever,whatever,whichever等
①Who willbring upthe childhasnt beendecided yet.谁来抚养这个孩子还没有打算
②Which lifestyleis themost beneficialto ourhealth is still unknown.还不知道哪种生活方式对我们的健康最有利
③Whoever lovestheir childrenwill beloved bytheir children.爱孩子的父母会被孩子爱©Whatever youdo shoulddo noharm toothers.无论你做什么都不应当损害别人【温馨提示】lwhat引导主语从句时在从句中作主语、宾语、表语或定语,相当于定语从句中的“先行词+关系代词〃的形式,表示“……的事情时间、地点、样子等〃What=The thingthat youdid yesterdaywas right.昨天你做得对She madea tripto what=the placethat wasonce abattlefield.她到以前曾是一个战场的地方去旅游了2“疑问词+ever”既可引导主语从句,又可引导让步状语从句但是“no matter+疑问词〃只能引导让步状语从句Whoever breaksthe lawshould be punished.主语从句任何违法的人都应当受到惩处Whoever=No matterwho breaksthe law,he shouldbepunished.让步状语从句无论谁违反法律,都应当受到惩处
3.连接副词引导主语从句连接副词引导主语从句并在从句中作状语,表示时间、地点、缘由、方式等连接副词有when,where,why,how等©How thebook willsell depends on itsauthor.这本书如何销售取决于作者本人
②Where weshall havethe meetingmakes nodifference.我们在哪儿开会都无所谓
三、主语从句与形式主语it有时为了考虑句子平衡,通常在含有主语从句的复合句中使用形式主语it,而将真正的主语从句移至句末常见的用形式主语it的主语从句结构有lIt be+名词词组+主语从句常用于这种句型的名词有a pity,a shame,a fact,an honour,a wonder,no wonder等It is a pitythat shehas madesuch amistake.她犯了这样一个错误,真是圆满2It be+形容词+主语从句Its strangethat heshould havetaken thebooks withoutthe ownerspermission.真惊奇,他竟然没有得到仆人的允许就把书拿走了3It be+过去分词+主语从句It isbelieved thatat least20buildings weredamaged ordestroyed.人们认为,至少有二十栋建筑遭到破坏或彻底毁掉4It+不及物动词happen,seem,appear,etc.+主语从句It happenedthat Ihad beenaway whenhe called.他打时,我碰巧不在家5It+及物动词+宾语+that从句It surprisedme thatour parentswouldn*t liketo acceptnew things.让我惊讶的是我们的父母不情愿接受新事物课后训练
1.Dad thinksI ama narcissist,but Isay isthat mypictures aren!thurting anyone,so whocares
2..It*strueinner beautyis veryimportant,but externalbeauty cantbepletely overlooked.
3.he managedto finishthe taskby himselfisstillamysteryto me.
4.・we gothere bytrain orby airmakes nodifference.
5.・he wasabsent fromthe meetingremains amystery.
6.Its knownknowledge istreasure andpractice isthe keyto success.
7.According tothe rules,fails toreturn thebooks ontime willhavetheir accountsfrozen.
8.he willattend themeeting ornot tomorrowdependsonhis timeschedule.
9.he wille backfrom Canadaisnt known,so Iwill callhim uptocheck theexact time.
10.It isobvious tothe studentsthey shouldget wellprepared fortheir future.参考答案what thatHow WhetherWhythat whoeverWhether Whnethat提升训练
1.will takecharge ofour classhasnt beendecided sofar.
2.makes thefilm soextraordinary isthe creativeimagination ofthe director
3.life existson anyother planetin thesolar systemstill remainsa question.
4.the headteacher presenta speechon thegraduate ceremonyisalongheld traditionatthis highschool.
5.is knowntousall isthat thesport meetingwilltakeplace inParis thissummer.
6.It ispretty wellunderstood controlsthe carbondioxide inand outtheatmosphere today.
7.we makefriends andmunicate withthem haschanged dramaticallypared withthe past.
8.Its trueinner beautyis veryimportant,but externalbeauty shouldntbepletely overlooked.
9.Does itmatter toyou hefinished thejob ontime
10.the housewill bebuilt willbe discussedat tomorrowsmeeting.who whatwhether ThatWhatwhat Howthat howWhere。