Unit4课文名词从句.ppt

1.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.以后它会变成什么没人能知道，直到38-45亿年前，这团尘埃才慢慢形成一个固体的球状物。,Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsagowhenthedustsettledintoasolidglobe.（主语从句）,2.Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.地球变得如此激烈动荡，以致于不知道这个固体形状是否会继续存在下去。仿写：她病得如此严重（seriously)以致明天是否能来还不清楚。Shewassoseriouslyillthatitwasnotclearwhethershewillcometomorrowornot.,Theearthbecamesoviolentthatitwasnotclearwhethertheshapewouldlastornot.（主语从句,it在这里作形式主语）,3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.更为重要的是，地球冷却下来后，地球的表面就开始出现了水。仿写：更为重要的是，我们要认真对待作业。（takeseriously)Whatismoreimportantisthatweshouldtakeourhomeworkseriously.,3.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.（主从、表从）,4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.,4.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.（主语从句）水会对生命的发展起关键作用，这一点在当时并不明显。结构这是个复合句,it是形式主语,真正的主语是后面的that从句句型：Itisobviousthat显然.短语：befundamentalto.对.是必要的根本的,1.显然老师已经原谅了他所做的一切。_theteacherhasforgivenhimforwhathehasdone.2.很明显他昨天没有说实话。_yesterday.,Itwasobviousthathedidnttellthetruth,Itisobviousthat,仿写根据汉语意思,完成英文句子,5.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandsea.,5.Whatmanyscientistsbelieveisthatthecontinuedpresenceofwaterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandsea.（主从、表从）很多科学家相信，由于地球上长期有水存在，使得地球得以把有害气体和酸性物质溶解在海洋里。搭配allowsb./sth.todosth.允许某人/某物做某事；使得以osth.使融入,6.Whytheysuddenlydisappearedstillremainsamystery.7.Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.,6.Whytheysuddenlydisappearedstillremainsamystery.（主从）,Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.（主从、宾从）,结构分析：whetherlifewillcontinueontheearthformillionsofyearstocome是一个_从句;willdependon是谓语；whetherthisproblemcanbesolved作为介词on的_从句。搭配:millionsofyearstocome在接下来的数百万年里(时间+tocome是个常用表达法),宾语,主语,Sowhetherlifewillcontinueontheearthformillionsofyearstocomewilldependonwhetherthisproblemcanbesolved.所以,在未来的数百万年中,生命能否在地球上延续取决于这个问题能否得到解决。(B3P26)仿写：我们是否进行考试取决于我们是否按时完成的任务。Whetherwewillhaveanexamdependsonwhetherwewillfinishthetaskontime.,1.Theywereintimetoproducecarbondioxide,nitrogen,watervapourandothergases,whichweretomaketheearthsatmosphere.2.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.3.Theymultipliedandfilledtheoceansandseaswithoxygen,whichencouragedthelaterdevelopmentofearlyshellfishandallsortsoffish.4.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.,2.Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop.这就产生了一系列的反应,使得生命就有可能开始发展了。(L25P26)句型makeit+adj.+forsb.todo使某人做某事说明it是形式宾语,后面的todo才是真正的宾语。,1.学英语使我们和外国人交流成为可能。2.这场雨使我们长途旅行很困难。Therain_alongjourney.,madeitquitedifficultforustogoon,LearningEnglishmakesitpossibleforustocommunicatewithforeigners.,仿写根据汉语意思,完成英文句子。,3.Theyareputtingtoomuchcarbondioxideintotheatmosphere,whichpreventsheatfromescapingfromtheearthintospace.他们把过多的二氧化碳释放到大气层中,这使得地球上的热不能释放到太空中去。(B3P26),prevent/stop/keep.from阻止/防止做/发生protect.from.保护不受提示在主动语态的句子中,stop和prevent后的from可省略,但keep后的from不能省略;在被动语态中,此三个短语的from均不可省略。,运用根据汉语提示完成句子。雨使我们不能踢足球了。Therain_.人们采取行动,防止了环境的恶化。Peopletookmeasuresandthus_.,preventedtheenvironmentfromgettingworse,preventedusfromplayingfootball,Readthewholepassageandcompletethemainideaofeachparagraph.,Para.1TheformationoftheuniversePara.2Theformationof_Para.3Theimportanceof_Para.4Thedevelopmentof_Para.5Thearrivalof_,theearth,water,plantsandanimals,humanbeings,1.Whatisevenmoreimportantisthatastheearthcooleddown,waterbegantoappearonitssurface.（主从、表从）2.Itwasnotimmediatelyobviousthatwaterwastobefundamentaltothedevelopmentoflife.（主语从句）3.Whytheysuddenlydisappearedstillremainsamystery.（主从）4.Thisproducedachainreaction,whic