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NounclausesasthesubjectUnit4Grammar231、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。preparationWhatpartdoestheunderlinedpartserveasineachsentence?Atreehasfallenacrosstheroad.Youareastudent.Tofindyourwaycanbeaproblem.Smokingisbadforyou.Whatshesaidisnotyetknown.Thatweshallbelateiscertain.Itiscertainthatweshallbelate.主语名词充当主语人称代词充当主语不定式充当主语动名词充当主语句子充当主语句子充当主语it充当形式主语Let’sseewhichgroupcanfindthesentenceslikethefollowingexamplesinReadingonPage25-26morequickly.Attentionplease:1.Fourorsixpeopleinagroup.2.Trytofindasmanysentenceslikethefollowingexamplesaspossible!3.Ifyourgroupfinishthetask,pleaseputupyourhandandonemembershouldtellusallthesentencesyourgrouphavefound.GroupcompetitionExamples:(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。SentencesinReadingP25-26Read&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:Idon’tknow.Ican’tfindtheanswerinthepassage.Wherehewasborn_____________________isstillunknown.StudentA:whowillwintheEnglishspeechcontest?StudentsB:Idon’tknow.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。1.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…(3)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!Finishex.2inDiscoveringusefulstructures.GroupworkDiscoveringusefulstructures1.Hisdiscoveryhasnotyetbeenproved.What__________________________________.2.Dotheotherastronomersaccepthisideas?Itremainsaquestion.Whether______________________________________________.3.Thefirstappearanceoflifeonearthisstillamysterytoscientists.How______________________________________________.hasnotyetbeenprovedishisdiscoveryotherastronomersacceptshisideasremainsaquestionlifefirstappearedonearthisstillamysterytoscientistsEx.24.Whyistheearthbecomingwarmer?Itisanimportanttopicforresearch.Why__________________________________________________________________________.5.StephenHawkingat65experiencedzerogravityduringaflight.Itamazedeverybody.Itamazedeverybody____________________________________________________________________________.6.Plutoisnolongerconsideredaplanetinoursolarsystem.Whatasurprise!Itisasurprise________________________________________________________________________.thatStephenHawkingat65experiencedzerogravityduringaflight.thatPlutoisnolongerconsideredaplanetinoursolarsystemtheearthisbecomingwarmerisanimportanttopicforresearch1.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。1)Finishex.2&3inyourworkbook;2)Writedown5subjectclausesinyourexercisebook.