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Inmydream,childrensingAsongofloveforeveryboyandgirlTheskyisblueandfieldsaregreen:AndlaughteristhelanguageoftheworldThenIwakeandallIseeIsaworldfullofpeopleinneedTellmewhy(why)doesithavetobelikethis?Tellmewhy(why)istheresomethingIhavemissed?Tellmewhy(why)cosIdon'tunderstandWhensomanyneedsomebodyWedon'tgiveahelpinghandTellmewhy?EverydayIaskmyselfWhatwillIhavetodotobeaman?DoIhavetostandandfightToprovetoeverybodywhoIam?IsthatwhatmylifeisforTowasteinaworldfullofwar?Tellmewhy(why)doesithavetobelikethis?Tellmewhy(why)istheresomethingIhavemissed?Tellmewhy(why)cosIdon'tunderstandWhensomanyneedsomebodyWedon'tgiveahelpinghandTellmewhy?SubjectClause主语从句Thathewillsucceediscertain.Whowillbeourmonitorhasn'tbeendecidedyet.Whetherhewilljoinuswon'tmakedifference.Howthebookwillselldependsonitsauthor.Whatcausedtheaccidentremainsunknown.定义:在句子中担当主语的是一个从句,这个从句就叫做主语从句。2.由形式主语it代替，而本身放在句子末尾。位置：1.通常放在主句谓语动词之前Itdoesn’tmatterwhetherheiswrongornot.辨别下列从句的类别：1.ItisimpossiblethatIgoandattendthemeeting.2.JohnsaidthathewasleavingforLondon.3.Thefactisthathehasnotbeenseenrecently.4.Thatweneedmoreequipmentisquiteobvious.5.HewilltalktousaboutwhathesawinU.S.6.Itisverylikelythattheywillholdameeting.宾语从句主语从句表语从句主语从句主语从句宾语从句引导主语从句的连接词可分为三类：连接词：that,whether,（if）连接代词：what,whichwho,whom,whose,whatever,whoever,whichever等连接副词：when,where,how,why，whenever,wherever等主语从句的连接词★无词义★在主语从句中不作成分★一般不能省略（尤其在句首时）Thathewillcomeandhelpusiscertain.Thatheisthebeststudentintheclassisobvious.thatWhetherwewillsucceedisstillaquestionIfwewillsucceedisstillaquestion.(×)Itisnotknownwhether/ifhewillcome.Whether（if）★有词义：“是否”★在主语从句中不作成分★whether引导的主语从句可放句首、句末★If引导的主语从句不能位于句首。连接副词when,where，why,how,等.Whatheishasnothingtodowithyou.Whoseticketthisishasnotbeenfoundout.Whenthetestwillbegivenisnotyetdecided.Whateveryoudidisright.连接代词what,whatever,who,whoever,whose,which,whichever等.★有词义★在主语从句中作成分在主语从句中，连接词的选择要看这个从句的句子结构，假如根据意思判断为缺少主语，宾语，表语等时应该考虑who,whoever,which,whichever,what,whatever,whom,whomever.如果缺少定语则想到whose,which,缺少状语，应该选择how,wherewhen,why等，因此要想做好题目首先你得了解句子成分。•_______Ican’tunderstandiswhyhehaschangedhismind.•_______breaksthelawwillbepunished.如何选择连接代词和连接副词缺少understand的宾语意为“…的事”缺少breaks的主语，意为“无论谁”WhatWhoeverThathefinishedwritingthecompositioninsuchashorttimesurprisedus.Whetherhewillcomeornotdoesn’tmatter.Whowilldothatjobisnotyetdecided.主语从句后置!=Itsurprisedusthathefinishedwritingthecompositioninsuchashorttime.=Itdoesn’tmatterwhetherhewillcomeornot.=Itisnotyetdecidedwhowilldothatjob.为了避免主语冗长,句子头重脚轻,主语从句作主语时通常用it作形式主语,主语从句放在后面作真正的主语.用it作形式主语的that-从句有以下搭配关系：a.It+be+形容词+that-从句Itisnecessary/important/obvious/certain/natural…that…b.It+be+名词+that-从句Itisapity/ashame/nowonder/anhonour/nosurprise…that…c.It+be+-ed分词+that-从句Itisbelieved/reported/said/thought/expected/knownthat…d.It+不及物动词+that-分句Itappears/seems/happens/matters/occurredtothat…Itisnecessarythattheproblemshouldbediscussedatonce.Itissaidthathe‘sgotmarried.Itseemsthathehasseenthefilm.It'sawonderthathedidn'tfail.主语从句的语序和时态Whyhediditwillremainapuzzleforever.Howthishappenedisnotcleartoanyone.Whatyouneedismorepractice.Whatyouneedwasmentionedbyhim.归纳：主语从句的语序用_____________________主语从句的时态：_________________________________。【观察】陈述语序不受主句的时态影响和限制主语从句作主语时主句中的谓语动词的单复数情况？Howheworkeditoutisstillasecret.Whowillwritethepoemhasnotbeendecidedyet.Howitwasdonewasamystery.Whereshehasgoneremainsnotknownyet.Whatweneedismoretime.Whatweneedaremanymorebooks.当主语从句作主语时，主句中的谓语动词一般用第三人称单数，但what引导主语从句的主句谓语动词的形式须根据句子的意思来判断或根据主句中的表语来决定。Whattheymakesinthisfactory______TVsets.Whathe’dlikemostforabirthdaypresent______acamera.areis主语从句强调句结构Itis+名词/形容词/过去分词+that-主语从句It+be+被强调部分+that+句子的其余部分作用平衡句子结构强调句子成分区分方法句子不能成立句子仍然成立“Itbe...that...”结构去掉it作形式主语的that-从句和it引导强调句的比较Itwasmysuggestionthatmadehimconfidentofsuccess.Itwasmysuggestionthatheneedsmorepractice.Mysuggestionmadehimconfidentofsuccess.强调句主语从句Mysuggestionheneedsmorepractice.1.Whereshallwespendtheholidayisn’tdecided.2.Youhavemadeamistakeisafact.3.Thatiscertainthatwecanwin.4.Thatpricewillgouparecertain.5.Ifthepolicemenwillcomeisnotcertain.weshallThatyouItisWhether改错练习用连接词填空1.It’sknown______waterisaformofenergy.2.______leavestheroomlastoughttoturnoffthelights.3.________theboydidn'ttakemedicinemadehismotherangry.4._______youcomeornotisuptoyou.5._______teamwillwinthematchisamatterofpublicconcern.WhichWhetherThatthatWhoever用主语从句翻译下列句子1.他住哪里是个谜.（puzzle）2.肯定没有什么能阻止我们来这里.(prevent…from…）3.她刚生了个健康的女婴使我们兴奋.（givebirthto）Wherehelivesisapuzzle.Itiscertainthatnothingwillpreventusfromcominghere.Thatshehasjustgivenbirthtoahealthybabygirlmadeusexcited.选择题1.____we’llgocampingtomorrowdependsontheweather.A.IfB.ThatC.WhetherD.Where2.Itworriedherabit____herhairwasturninggray.A.ifB.thatC.whileD.for3.____makesthisshopdifferentisthatitoffersmorepersonalservices.A.WhatB.WhateverC.WhoD.Whoever.4.______hewon'tgothereiscleartoallofus.A.WhereB.WhatC.WhyD.This5.Itisnoneofyourbusiness____otherpeoplethinkaboutyou.Believeyourself.A.howB.whatC.whichD.when1.Ireadaboutitinsomebookorother,doesitmatter______itwas?A.whereB.whatC.howD.which2.“_______madeherstrug