经典：必修三主语从句课件

SubjectClauseRevision

Findthesubjectsinthefollowingsentences.1.Atreehasfallenacrosstheroad.2.Youareastudent.3.Tofindyourwaycanbeaproblem.4.Smokingisharmfultoyou.5.Whatshesaidisnotyetknown.6.Thatweshallbelateiscertain.主语从句在句中充当主语的从句叫做主语从句。1Thathewillcomeiscertain.2Whetheritwillpleasethemisnoteasytosay.3Whatseemseasytosomepeopleseemsdifficulttoothers.4Whichsidewillwinisnotclear.5Whyhediditremainsamystery.6Whentheywillstartisnotknownyet.7Howhebecameagreatscientistisknowntousall.8Whowilltakepartinthemeetinghasnotbeendecided.9Whoeverbreaksthelawwillbepunished.10Wheresheisfromisunknown.Findthesubjectclausesinthefollowingsentences,andtranslatethem.思考：主语从句有哪些引导词，这些引导词如何选用？主语从句的引导词：连词that,whether

连接代词

who(ever),whom(ever),which(ever),what(ever)连接副词where,when,why,how依据“缺什么补什么”原则确定正确的连词。所谓“缺什么补什么”是指句型结构与连词之间的关系。如果句子中缺主语，指人用who，指物用what；如缺宾语，指人用whom，指物用what；如缺时间状语用when；地点状语用where；原因状语用why；方式状语用how；定语用whose或which；什么都不缺用that。Completethesentencesusingwhat,whether,where,

when，who,why,how

or

that.1.(_____isneededforsuccess)isyourhardwork.3.(_____wewillgotomorrow)hasn’t

beendecidedyet.2.(______theywillarrive)hasbeentoldtotheteacher.4.(___canjoininthesportmeet)isdecidedbytheteacher.5.(________itwillrainornot)isnotclear.7.(______theearthisasolidball)isknowntousall.WhatWhen/HowWhere/whetherWhoWhetherThat6.(____theearthisbecomingwarm)isagoodtopicforresearch.Why主语从句作主语时，谓语动词一般用单数形式。Conclusion:主语从句的规律例1.Whenwillhecomeisnotknown.规律一、主语从句一律用陈述语序，即主语在前，谓语在后。正：Whenhewillcomeisnotknown.例2.Hewillnotcometothemeetingthiseveningistrue.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.

Whenhewillcomeare

apuzzle.正：Whenhewillcomeisapuzzle.规律四、主语从句的谓语动词多用单数第三人称形式。Whenthemeetingwillbegin_____(have)notbeendecidedyet.hasWhentheywillstartandwheretheywillgo_____(be)stillunknown.Whenandwherethemeetingwillbegin_____(have)notbeendecidedyet.arehas例5.1.Whatheneeds___thatbook.2.Whatheneeds____somebooks.规律五、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。isareItiscertainthathewillwinthematch.例6Thathewillwinthematchiscertain.

规律六一般来说主语从句都是放在

,但有时为了使句子

,避免”头重脚轻”,常用

作

，从而把主语从句放在

．

句首保持平衡

it

形式主语后面这样就构成了下面一些常用句型:

1)Itis+n.+that

Itisapity/shamethat...可惜的是……

Itisasurprisethat…令人吃惊的是…

Itisafactthat…事实是…Itiscommonknowledgethat……是常识

*_______________(很可惜)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat2)Itis+adj.+that

It’scertainthat…肯定…

Itispossible/likelythat...很可能……Itisobvious/clearthat…很明显…Itistruethat…的确…

Itisnecessary\important\natural\...that…*_______________(很可能)shewillcomebacktomorrow.*_______________(很明显)heisanEnglish.+sb(should)+do…ItispossiblethatItisobviousthat3)It+不及物动词+thatIthappenedthat...碰巧……Itoccurredtomethat…我突然想起…Itappears/seemsthat…似乎，好像…Itturnedoutthat…原来…*________________(刚好)Iwasoutyesterday.*____________________(我突然想起)Iforgottosenttheletter.IthappenedthatItoccurredtomethat4)It+be+过去分词+从句Itissaidthat...据说……Itisknowntoallthat...众所周知……Itisreportedthat...据报道……Itisbelievedthat...据相信……;据认为……Itissuggestedthat+sb

(should）do...

建议……他是不是我的孩子仍然是个问题。Whetherheismychildremainsaquestion.WhatIlikemostisyourhairstyle.我最喜欢的是你的发型。WhatIneedisrest.我需要的就是休息。Whattheboydidmadetheteacherangry.这个男孩所做的事让老师很生气。Whoeverseesthegirlisattractedbyher.任何见到这个女孩的人都被她吸引。Itisbelievedthattheworddiaosireflectssocialproblems.据认为“屌丝”这个词反映了社会问题。Itiscommonknowledgethatweshouldwearrainshoesonrainydays.雨天要穿雨鞋（rainshoes）是常识。importantnothaveastupidteammateItisimportantthatweshouldnothaveastupidteammate.1Whetherheismychildremainsaquestion.

2WhatIlikemostisyourhairstyle.3WhatIneedisrest.4Whattheboydidmadetheteacherangry.5Whoeverseesthegirlisattractedbyher.6Itisbelievedthattheworddiaosireflectssocialproblems.7Itiscommonknowledgethatweshouldwearrainshoesonrainydays.8Itisimportantthatweshouldnothaveastupidteammate.主语从句在写作中的应用1.合并句子:Whetherwillyougototheparty?Itmakesnodifference.2.开头句式：句型+自编名言Itisuniversallyacknowledgedthat…公认…Itgoeswithoutsayingthat…不用说…Itgoeswithoutsayingthat(努力通向成功)_________________________.Whetheryouwillgotothepartymakesnodifference.Itmakesnodifferencewhetheryouwillgototheparty.hardworkleadstosuccess3.结尾提建议的句式：

AsfarasIamconcerned,itisnecessarythat_______.(Itissuggested/recommendedthat…Itishightimethatweshouldtakesomemeasures.Itisnecessary/important/vitalthatsb.should…)4.what引导的主语从句Whatimpressed/surprisedmemostis…Whati