主语从句超全讲解加练习

1、1 / 51）从属连词：that，whether等.that引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。Thathewillwiniscertain.他肯定会赢。Whetherhellcomehereisn他Cea会来这里还不清楚。注意:由that引导的主语从句有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面。例如:1 .Thathewillrefusethispieceofadviceisimpossible.2 .Thattheyshouldlikeeachotherisnatural.这样就构成了下面一些常用句型:1） Itis+n.+从句Itisapity/shamethat.遗憾的是Itisasurprisethat令人惊奇的是Itisafactthat是事实Itiscommonknowledgethat是常识（很遗憾）welostthematch.（这是事实）hecheatedintheexam.2） Itis+adj.+从句Itscertainthat肯定Itispossiblethat.彳艮可能Itis

2、unlikelythat.不可能Itisobviousthat彳艮明显.that+（should）do（很可能）shewillcomebacktomorrow.*（很明显）thismeasureiseffective.3） 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.4） It+be+过去分词+从句Itissaidthat.据说Itisknowntoallthat.众所周知Itisreportedthat.据报道Itisbelievedthat.人们相信/认为Itissuggestedthat+（shoulddo.建议据报道（）20peoplewerekilledintheaccident.*（建议）weshouldeatmorevegetableanddomoreexercise.whichever, whoever2.连接代词who，what，which,whatever,(Who,whom,whi

3、ch,what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。它们在句子中担任主干成分，并用陈述句形式)WhatmanyscientistsbelieveisthattheearthisroundWhowilltakepartinthemeetinghasnotbeendecided.Whoeverbreaksthelawwillbepunished.Whateverwassaidheremustbekeptsecret.3)连接副词when，where，how，why等。Whytheysuddenlydisappearedstillremainsamystery.Whentheywillleaveisnotdecided.Howwewillpaintthehousehasnotbeendecided.注意:1)主语从句在句首时，必须由连接词引导，不能省略这些连接词误：Theyshouldlikeeachotherisnatural.正：Thattheyshouldlikeeachotherisnatural2) whether引导主语从句，if不可误：IfMa

4、ryreallyheardhimisreallydoubtful.正:WhetherMaryreallyheardhimisreallydoubtful.Completethesentencesusingwhat,whether,where,when，who,why,howorthat.1 .(isneededforsuccess)isyourhardwork.2 .2.(theywillarrive)hasbeentoldtotheteacher.3 .(wewillgotomorrow)hasntbeendecidedyet.4 .(canjoininthesportmeet)isdecidedbytheteacher.5 .(itwillrainornot)isnotclear.Conclusion:主语从句作主语时，谓语动词一般用单数形式。主语从句的规律：找出下列句子中的错误，并总结规律例1.Whenwillhecomeisnotknown.正：Whenhewillcomeisnotknown.规律一、主语从句一律用陈述语序，即主语在前，谓语在后。例2.Hewillnotcom

5、etothemeetingthiseveningistrue.正：Thathewillnotcometothemeetingthiseveningistrue.规律二、连词that在从句中无实际意义，但不能省略。例3.Ifthemeetingwillbeputoffhasnotbeendecidedyet.正：Whetherthemeetingwillbeputoffhasnotbeendecidedyet.规律三、whether可以引导主语从句，放在句首，但if不能例4.Thatwhetherhewillhelpothersisafact.正：Thathewillhelpothersisafact.规律四、主语从句中的连词不能重叠使用。例5.Whenhewillcomeareapuzzle.正：Whenhewillcomeisapuzzle.规律五、含主语从句的主句谓语动词多用单数第三人称形式。1. Whatheneedsisthatbook.2. Whatheneedsaresomebooks.规律六、what引导的主语从句，可根据表语决定主句动词的单复数形式。规律七、主语从句为了

6、避免头重脚轻现象,用it做形式主语，而把从句放在后面。Thattheearthturnsaroundthesunisknowntoall.Itisknowntoallthattheearthturnsaroundthesun.找出错误，并给出理由：1 .Whereshallwespendtheholidayisntdecided.2 .Youhavemadeamistakeisafact.3. Ifthepolicemanwillcomeisnotcertain.4. Thatiscertainthatwecanwin.5. Itisorderedweshouldleaveatonce.6. Wherehecomesfromareamystery.7. Whatwhetherhelikesthejobisnotclear.8. Whoheisandwhereheisfromisimportant.9. Whathesawisthestarsinthesky.1 ._hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD

7、.How2. _wellgocampingtomorrowdependsontheweather.AIfBWhetherCThatDWhere3. Itworriedherabit_herhairwasturninggray.whetherB.thatC.whatD.when4. WhatIsayandthink_noneofyourbusiness.A.isB.areC.hasDhave请用恰当的主语从句连词填空:What,it,that,whether,whoever1. youdontlikehimisnoneofmybusiness.2. hesaidatthemeetingastonishedeverybodypresent3. the2000OlympicGameswillbeheldinBeijingisnotknownyet.4. wellgocampingtomorrowdependsontheweather.5. leavestheroomlastoughttoturnoffthelights.用whetherif填空1 .Thequestionisthefilmi

8、sinteresting.2 .weshallattendthemeetinghasntbeendecidedyet.Correctornot?Ifwewillhaveameetinghasntbeendecidedyet.Whetherwewill.decidedyet.Payattention放在名词性从句旬首，表示是否，只能用whether,不能用ifThatshewantstoknowiswhenthepartywillbeheld.WhatshewantstoknowisPayattention此主语从句缺少成分-宾语，故用作成分的what来引导，而不用thatHewillgiveuphisjobsurprisesallofus.ThathewillgiveupPayattention:由that引导的主语从何放在旬首，that不能省略。1 ._hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD.How2 ._wellgocampingtomorrowdependsontheweather.AIfBWhetherCThatDWhere3 ._isknowntousallthatAmericaisadevelopedcountry.AWhichBAsCWhatDItItsknowntousall_a_formofenergy.A.waterisB.thatwaterisC.iswaterD.thatwaterto5 .Itworriedherabit_herhairwasturninggray.A.whetherB.thatC.whatD.when6 .WhatIsayandthink_noneofyourbusiness.A.isB.areC.hasDhave

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