【创新思维】人教版高一英语必修3课件：Unit 4 Period 3 Grammar.ppt

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 let sseewhichgroupcanfindthesentenceslikethefollowingexamplesinreadingonpage25 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 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 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 willbeourmonitorhasn tbeendecidedyet 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 ifshe scomingornotdoesn tmattermuch 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 youdon tneedtodoexercises 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 thatstephenhawkingat65experiencedzero