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Nounclausesasthesubject,Unit4Grammar,主语从句,2,3,1、帮助学生了解、熟悉并初步掌握名词性从句主语从句的用法。2、使学生能够找出主语从句，并动手解决主语从句的相关练习。3、学会用主语从句简单会话表达。,本课首先开始于简单句子到复合句子中对主语的认识，从学生熟悉的名词、人称代词充当主语，一步一步由浅入深过渡到句子作主语。旨在给学生有个初步认识，为下面的环节打基础。通过小组竞赛，在已学的reading中快速找出主语从句，旨在加深学生对主语从句的认识程度，竞赛有利于培养学生的合作能力，使语法课生动活跃起来。通过不同的语法练习的呈现、讲练结合看图根据对话写出主语从句及各种语法任务设置，使学生掌握主语从句的相关知识。尤其是tryyourluck部分更能调动学生学语法知识的气氛，提高学生解决语法知识的能力，熟悉主语从句。,preparation,Whatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.,主语,LetsseewhichgroupcanfindthesentenceslikethefollowingexamplesinReadingonPage25-26morequickly.Attentionplease:1.Fourorsixpeopleinagroup.2.Trytofindasmanysentenceslikethefollowingexamplesaspossible!3.Ifyourgroupfinishthetask,pleaseputupyourhandandonemembershouldtellusallthesentencesyourgrouphavefound.,Groupcompetition,Examples:(sentencesservedassubject)Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.,1.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.地球会变成什么样子，直到45亿至38亿年前这个云团变成固体的球状物，才确定下来。2.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.地球变得激烈动荡，不知道这个固体形状是否会继续存在下去。3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.更重要的是，随着地球的冷却，地球的表面就开始出现了水。4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.水对于生命的发展会起关键作用，这一点在当时并不明显。,Read&translate,所有划线的句子都充当_.那么什么是主语从句呢？,主语,主语从句(SubjectClause),如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句。,Thathefinishedwritingthecompositioninsuchashorttimesurprisedusall.Whatweneedaregooddoctors.Whomwemuststudyforisaquestionofgreatimportance.,Whatissubjectclause?,主语从句三要素,hebecameagreatscientistisknowntousall.,Iswhatyoutoldmereallytrue?,谓语动词用单数,从句用陈述语序,不能省略关联词,Notice:,Whatweneedmostarebooks.,How,_hasnotbeenfound.,StudentA:wherewasThomasEdisonborn?StudentsB:Idontknow.Icantfindtheanswerinthepassage.,Wherehewasborn,_isstillunknown.,StudentA:whowillwintheEnglishspeechcontest?StudentsB:Idontknow.Itishardtosay.,Whowillwinthematch,_willbewelcome.,StudentA:Tom,tomorrowisyourbirthday.Whodoyouinvite?StudentsB:Iwillwelcomeeveryonewhocomestomyparty.,Whoevercomes,在主语从句中,谓语一般用单数。,无论他说什么都不重要。Whateverhesaysisofnoimportance.无论谁说这话都不对。Whoeversaysthatiswrong,但谓语动词用单数还是复数,不可一概而论,而要视句子的意义而定。WhatIneedismoney.WhatIneedarebooks.,what与that在引导主语从句时的区别what引导主语从句时在句时在从句中充当句子成分,如主语、宾语、表语,而that则不然。1)Whatyousaidyesterdayisright.2)Thatsheisstillaliveisaconsolation.,为了防止句子头重脚轻，通常把形式主语it放在主语位置，真正主语后置。,Itiscertainthathewillwinthematch.Thathewillwinthematchiscertain.,2.Itistruethathehasmadeaveryimportantdiscoveryinchemistry.Thathehasmadeaveryimportantdiscoveryinchemistryistrue.,3.Itisverylikelythattheywillholdameeting.Thattheywillholdameetingisverylikely.,1.以that引出的主语从句,常以形式主语it引导,结构为:Itis+形容词/名词/某些动词ed+that从句。(1)Itis+形容词/名词+that从句，如：Itisapity/shamethat遗憾的是Itispossiblethat很可能Itisunlikethat不可能(2)It+不及物动词+that从句，如：Itseems/appearsthat.似乎Ithappenedthat碰巧,It+be+过去分词+that从句Itissaidthat据说Itisknowntoallthat众所周知Itisreportedthat据报道Itisbelievedthat人们相信Itissuggestedthat有人建议Itmustbepointedoutthat必须指出,Tryyourluck!,Choosethepicturesandfinishtheexercisewithyourgroup!,1._watchwaslostisunknown.2._youdidisright.3._wewillgoforanoutingtomorrowremainsunknown.4._weneedistime.5._willbeourmonitorhasntbeendecidedyet.,whetherwhatwhowhosewhatever,Usethewordsbelowtofillintheblanks.,Whether,What,Whatever,Whose,Who,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。1.Lighttravelsfasterthansoundiscommonknowledge.2.Ifshescomingornotdoesntmattermuch.,That,that虽无词义但引导主语从句位于句首时不能省略。,Whether,if,whether都可表示“是否”,但if不能引导位于主句之前的主语从句，它可以引导位于主句之后带有形式主语it的主语从句。,back,Youareluckytoday!Youdontneedtodoexercises!,back,3.Thattheprofessorsaidisofgreatimportance.4.Wherewillthetreesbeplantedhasnotbeendecided.,What,that引导主语从句时无词义。Whattheprofessorsaid表示“教授所说的”。,将will置于trees之后。主语从句要用陈述句语序。,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。,5.Nomatterwhobreakstherulewillbepunished.6.Whenthemeetingwillbeheldstillremainaquestion.,引导让步状语从句时二者可互换，但引导名词性从句时只能用whoever。,Whoever,主语从句表示单一概念时，谓语要用单数形式。,remains,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。,7.Itwasrequestedthateveryonemadeaspeechatthemeeting.,在“Itisrequested/ordered/suggested+that从句”中，从句要用虚拟语气，即谓语用“should+动词原形”，should可省略。,(should)make,back,【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。,Finishex.2inDiscoveringusefulstructures.,Groupwork,Discoveringusefulstructures,1.Hisdiscoveryhasnotyetbeenproved.What_.2.Dotheotherastronomersaccepthisideas?Itremainsaquestion.Whether_.3.Thefirstappearanceoflifeonearthisstillamysterytoscientists.How_.,hasnotyetbeenprovedishisdiscovery,otherastronomersacceptshisideasremainsaquestion,lifefirstappearedonearthisstillamysterytoscientists,Ex.2,4.Whyistheearthbecomingwarmer?Itisanimportanttopicforresearch.Why_.5.StephenHawkingat65experiencedzerogravityduringaflight.Itamazedeverybody.Itamazedeverybody_.6.Plutoisnolongerconsideredaplanetinoursolarsystem.Whatasurprise!Itisasurprise_.,thatStephenHawkingat65experiencedzerogravityduringaflight.,thatPlutoisnolongerconsideredaplanetinoursolarsystem,theearthisbecomingwarmerisanimportanttopicforresearch,1.主语从句位于句首时必须由连接词引导。2.主语从句后置时引导词that可省略。3.主语从句位于句首时,不能用if引导。4.主语从句后置时,可以用if引导。,Finishex.22)Writedown5subjectclausesinyourexercisebook.,
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