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NounClauses(名词性从句)SubjectClause(主语从句)AppositiveClause（同位语从句）ObjectClause（宾语从句）PredicativeClause（表语从句）Whowillwinthematchisstillunknown.Iwanttoknowwhathehastoldyou.Thefactisthatwehavelostthegame.Thenewsthatwewonthegameisexciting.主语从句宾语从句表语从句名词性从句的作用相当于名词，因此主语从句、表语从句、宾语从句和同位语从句分别作主句的主语、表语、宾语和同位语。同位语从句什么是主语？1.Thetrainleft.2.Youareastudent.3.Smokingisbadforyou.4.Tofindyourwaycanbeaproblem.主语：句子说明的人或事物,一般位于______。句首5.“Howdoyoudo?”isagreeting.6.Whatshesaidisnotyetknown.7.Thatweshallbelateiscertain.8.Itiscertainthatweshallbelate.定义：在复合句子中充当主语的句子就是主语从句。位置：通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。引导词1)从属连词that，whether和if：•Thathewillcomeiscertain.•Whetherhewillcomeisuncertain._____不做成分，无意义，不能省略。whether不做成分，表“_______”。￭It'snotclear________hewillcome.引导主语从句在句首只能用whether,有it作形式主语的whether/if都可以.that是否whether/if1.________hemadeanimportantspeechatthemeetingwastrue.2.________we’llgocampingtomorrowdependsontheweather.3._____isknowntousallthatAmericaisadevelopedcountry.ThatWhetherItItiscertainthathewillwinthematch.Thathewillwinthematchiscertain.注解：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.+thatItisapity/shamethat...可惜的是……Itisasurprisethat…令人吃惊的是…Itisafactthat…事实是…Itisnowonderthat……难怪……*_______________(很可惜)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat练一练：1.令人吃惊的是他改变了主意。Itisasurprisethathechangedhismind.2.真可惜你错过了这么一个好机会。Itisapitythatyoumissedsuchagoodchance.3.事实是我们周围的污染正变得越来越严重。Itisafactthatthepollutionaroundusisbecomingmoreandmoreserious.2)Itis+adj.+thatIt’scertainthat…肯定…Itispossible/likelythat...很可能……Itisobvious/clearthat…很明显…Itistruethat…的确…Itisnecessary\importantthat…*_______________(很可能)shewillcomebacktomorrow.*_______________(很明显)heisanEnglishteacher.________________(这是重要的)weshoulddoenoughsports.ItispossiblethatItisobviousthatItisimportantthat练一练：1.很可能他会申请这项工作的。Itislikelythathewillapplyforthejob.2.的确我犯了个错误。ItistruethatImadeamistake.3.我们有必要学好英语。ItisnecessarythatweshouldlearnEnglishwell.3)It+不及物动词+从句Ithappenedthat...刚好，碰巧……Itoccurredtomethat…我突然想起…*________________(刚好)Icameintotheofficeatthattime.*____________________(我突然想起)Iforgettosendtheletter.IthappenedthatItoccurredtomethat4)It+be+过去分词+从句Itissaidthat...据说……Itisknowntoallthat...众所周知……Itisreportedthat...据报道……Itisbelievedthat...据信/认为……;人们相信/认为……Itissuggestedthat+(should）do...据建议;有人建议*___________________(据报道)20peoplewerekilledintheaccident.*____________________(据建议)weshouldeatmorevegetablesanddomoreexercise.ItisreportedthatItissuggestedthat2)连接代词who(ever),what(ever),which(ever),whose①.Whowillgomakesnodifference.②.Whatweneedismoretime.③.Whichstudentwillwinthefirstisuncertain.④.Whoeverbreaksthelawwillbepunished.连接代词不但起连接作用，也在从句中作名词或代词所作的成分，如主语、宾语、表语、定语。3)连接副词when，where，why，how等。Whentheywillsetoffisnotdecided.Wheresheisfromisunknown.Whyhecriesisnotclear.Howwewillpaintthehousehasnotbeendecided.连接副词在句中不但起连接作用，也在从句中作状语，表示时间、地点、原因和方式。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、连接词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.Whenhewillcomeareapuzzle.正：Whenhewillcomeisapuzzle.规律四、单个主语从句作主语，主句的谓语动词用单数形式。Whenthemeetingwillbegin_____(have)notbeendecidedyet.hasWhentheywillstartandwheretheywillgo_____(be)stillunknown.Whenandwherethemeetingwillbegin_____(have)notbeendecidedyet.arehas练一练：例51.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。isare2._______theycansolvethequestionisstillunknown.A.IfB.WhichC.WhetherD.What3._____hesaidatthemeetingastonishedeverybody.A.WhyB.WhatC.ThatD.Who4.____isafactthatEnglishisacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It1._____weneedmorepracticeisquiteobvious.A.WhatB.ThatC.WhenD./1.Whereshallwespendtheholidayisn’tdecided.2.Youhavemadeamistakeisafact.3.Thatiscertainthatwecanwin.4.Nomatterwholeavestheroomlastoughttoturnoffthelights.5.Itisimportantthatastudentlearnsaforeignlanguage.weshallItWhoevershouldlearn改一改：∧ThatWhatIlikemostisyourhairstyle.我最喜欢的是你的发型。WhatIneedisrest.我需要的就是休息。_______________theworddiaosireflectssocialproblems.据认为“屌丝”这个词反映了社会问题。ItisbelievedthatWhattheboydidmadetheteacherangry.这个男孩所做的事让老师很生气。____________________________________dependsonherhardwork.杜拉拉如何成功取决于她的勤奋。HowDuLalabecomessuccessful