Unit1ScienceandScientistsDiscoverusefulstructures表语从句课件高二英语人教版选择性

选择性必修二Unit1ThePredicativeClausesDiscoverusefulstructuresTeachingobjectives:1.Enablethestudentstomastertheusageofpredicativeinthisunit.2.Enablethestudentstousethepredicativepatternsflexibly.3.Trainthestudentstoapplysomeskillsbydoingtherelevantexercises.review目录CONTENTS表语从句定义表语从句引导词巩固练习表语从句定义01PartOne1.Onetheorywasthatbadaircausedthedisease.2.Anothertheorywasthatcholerawascausedbyaninfectionfromgermsinfoodorwater.3.ThetruthwasthatthewaterfromtheBroadStreethadbeeninfectedbywaste.画出下列句子中的表语从句总结：在复合句中作____________的从句，叫作表语从句。表语从句接在__________________之后，对主语进行解释、说明，使主语的内容具体化。表语be动词或系动词系动词有哪些？1.状态类:be动词;keep,remain,stay,2.感官类:look,feel(摸起来),smell,sound,taste3.变化类:

become,grow,turn,get,go,come,run,fall4.像类:seem,appear,5.终止类:turnout结果是,prove证明是表语从句引导词注：表语从句用陈述语气，且连接词均不可省略。02PartOneIngeneral,doctorsinthosedayshadtwocontradictorytheoriestoexplainhowcholeraspread.Onetheorywas______badaircausedthedisease.Anotherwas______cholerawascausedbyaninfectionfromgermsinfoodorwater.(Para.2)

Whatismore,inanotherpartofLondon,awomanandherdaughterhaddiedofcholeraaftermovingawayfromBroadStreet.Itseemed______thewomanlikedthewaterfromthepumpsomuchthatshehaditdeliveredtoherhouseeveryday.(Para.3)一、that引导的表语从句thatthatthatthat____意义，在表语从句中______成分,起______作用，________省略。无不充当连接不能Thequestionis_________wecanrelyonhim.Heoftentellslies.Thequestionis_________wecanfinishthetaskontime,forwehaveonlythreedaysleft.二、whether引导的表语从句whetherwhether思考：可以用“if”来引导吗？连接词whether起_____作用，意为“_________________”，在句中也不作任何成分（注意：if______引导表语从句)。连接是否、究竟、到底不能三、what,which,who,whom,whose等引导的表语从句whatwhichwhowhose连接代词what,which,who,whom,whose除在句子中起______作用外，还可在从句中作_____、_____或______，且各有词义。连接主语表语定语that与what的区别总结：that引导表语从句时，是连词，在从句中不作成分；what是连接代词，引导表语从句时，在从句中作主语、宾语或表语。1.Thefactis_____________wetendtomakemistakeswhenwearenervous.2.Thisis______________Iwanttosay.3.Thequestionis______________causedtheaccident.4.Thetroubleis_____________shehaslosthisaddress.thatwhatthatwhat四、where,when,why,how引导的表语从句wherewhyhowwhen连接副词where,when,why,how除在句中起______作用外，在从句中还充当_______、______、______或______状语，本身具有词义。连接时间地点方式原因Itseems__________________hedoesn’tknowtheanswer.Itlooks__________________itisgoingtorain.五、asif/asthough引导的表语从句asif/asthoughasif/asthough系动词后面注意：asif/asthough引导的表语从句如果是事实，就用陈述语气；如果与事实不符，就用虚拟语气。1.Itsoundsasifsomeoneisknockingatthedoor.(与事实相符)2.Tomlikestotalkbigasifhewereanimportantperson.

(对现在的虚拟，用一般过去时，be动词用were)3.Heopenshismouthashewouldsaysomething.

(对将来的虚拟，用would/could/might+动词原形)4.HetalkedaboutRomeasifhehadbeen

there.(对过去的虚拟，用haddone)Thereasonwhyheislateforschoolis________hemissedthebus.2.Whywedecidedtoputoffthefootballmatchis________theweatherwastoobad.thatthat当主句的主语是_____________或why引导的__________时常用______来引导表语从句，而不用because。thereason主语从句thatAttention3.Ithinkthat’s_____hewassoangry.4.Ithinkitis________youaredoingtoomuch.5.Thereason______hewassolateis_____itwasraininghard.whybecausethat/this/it+is/was+why+________(原因/结果)

表示“_________________________”that/this/it+is/was+because+_______(原因/结果)

表示“________________________”thereasonwhy…isthat…中why是引导_________，that引导的是_________，表示“___________________”。这/那就是……的原因结果这/那就是因为……原因whythat定语从句表语从句……的原因是……Attention6.Mysuggestionisthatwe____________(go)andhelphim.7.Myadviceisthatwe____________(get)therebytrain.(should)go(should)get当主句的主语是表示建议（suggestion,advice）、命令（order）、要求（request,proposal）、计划（plan）等的名词时，表语从句要用虚拟语气，即（should）+动词原形。Attention常见句式Itseems/appearsthat+句子“似乎...”Itturnsout/provesthat+句子“结果、原来...”Thechancesarethat+句子“可能....”Itseemsthatwearegoingtobelate.Itturnsout/provesthatshewasafriendofmysister.Thechancesarethathewillrecoverfromhisinjuryintimeforthenextgame.巩固练习03PartOne解题思路先根据句意选择不充当成分that,whether,asif/though,because连词充当状语when,where,why,how连接副词充当定语whose,what,which连接代词充当主语，宾语，表语其他再分析“充不充当句子成分”1.Myworryisifhecangetthereontime.2.Thereasonwhyhefailedwasbecausehehadn’tstudiedhard.3.Myadviceisthatheseesthedoctorrightaway.4.Thetroubleiswhatweareshortofmoney.thatPracticeandApplywhetherthatsee即学即练改错Completethefollowingideasbyfamousscientistswithawordorexpressionthatintroducesapredicativeclauseandtranslatetheminyourownwords.Researchis_________I’mdoingwhenIdon’tknowwhatI’mdoing.(WernervonBraun)what

asthoughbecausethatwhatwhoeverwhyPracticeandApply研究就是当我不知道自己在做什么的时候我在做的事。

——布劳恩（徳裔美籍火箭科学家）2.Thesaddestaspectofliferightnowis_______sciencegathersknowledgefasterthansocietygatherswisdom.(IsaacAsimov)that

asthoughbecausethatwhatwhoeverwhyPracticeandApply当下生活最可悲的一面就是科学积累知识的速度超过了社会积累智慧的速度。——艾萨克·阿西莫夫

（美国科幻小说作家、化学家）3.Anexpertcanbe_________hasmadeallthemistakesthatcanbemadeinaverynarrowfield.(NilesBohr)whoever

asthoughbecausethatwhatwhoeverwhyPracticeandApply专家可能是在一个非常狭窄的领域里犯了所有可能犯的错误的人。——尼耳斯·玻尔（丹麦物理学家）4.Whendifferentexperimentsgiveyouthesameresult,itisnolongersubjecttoyouropinion.That’sthegoodthingaboutscience:Itistruewhetherornotyoubelieveinit.That’s_________itworks.(NeildeGrasseTyson)whyasthoughbecausethatwhatwhoeverwhyPracticeandApply当不同的实验呈现出相同的结果时，它就不再受制于你的意见。这就是科学的好处:不管你信不信它都是真的。这就是科学工作的原理。

——奈尔·德葛拉司·泰森（美国天文学家）5.Thisappliedscience,whichsavesworkandmakeslifeeasier,bringsuslittlehappiness.Thatis_________wehavenotyetlearnttomakesensibleuseofit!(AlbertEinstein)because

asthoughbecausethatwhatwhoeverwhyPracticeandApply这种节约工作量，使生活更容易的应用科学，给我们带来的快乐很少。那是因为我们还没有学会合理地利用它!——爱因斯坦6.Thereareonlytwowaystoliveyourlife.Oneis____________nothingisamiracle.Theotheris____________everythingisamiracle.(AlbertEinstein)asthoughasthough

asthoughbecausethatwhatwhoeverwhyPracticeandApply你的生活只有两种方式。一种是好像什么都不是奇迹。另一种是好像一切都是奇迹。——爱因斯坦asifthatwhatwhowhenhowwhywhosewhichwhether•A:Absolutely!Youmaynotbelieveit,butthatwas___________happenedattheinitialstageofourgroup'sresearchondevelopingavaccineformalaria.•B:Yes,itis.Anditseemed__________thetheorieswereuseful,butthefactwas_________wecouldn’tpersuadeoneanotherthatonetheorywasbetterthananother.whatasifthat宾从•C:Exactly.Theproblemwasnotabout______________allourtheorieswereequallygood,butindeciding_______________________theorytodependupon.•D:Werealizedthatwhatwecaredaboutwasnot_______________aspectweneededtodevelopatheoryin,butrather_____wecanreducethecostofavaccinewithoutreducingitseffect!•E:You'reright.Atlast,webecamefocusedonthekeyissue,whichwas_________wehadtocarryouttheresearchinthefirstplace.whetherwhich/what/whosewhich/whathowwhy主从•Maria:Thismixoftheoryanddataisoneofthekeycharacteristicsofwhatwecallscience.•David:_________________•Maria:Withyourtheoreticalframework?•David:__________________•Maria:Decidingonatheoryisdefinitelyofcriticalimportance.•David:_________________•MariaThiswaswhenyoushouldhavecalmeddownandgotdowntodoingsomesolidwork.•David:_________________•Maria:Sowhathappenedintheend?•David:_________________BCEDA宾从of+抽象n.=adj.1.Thefactwas

.事实是他没有做真正的努力。2.Thequestionis

.问题是这部电影是否值得看。3.

shehadknownMillieforyears.看起来好像她认识米莉已有好多年了。4.Myadviceis

asoftenaspossible.我的建议是你尽可能经常地练习说英语。2.Completethesentences.thathedidn'treallytrywhetherthefilmisworthseeingItseemedasthough/ifthatyou(should)practisespeakingEnglish5.That's

.那就是我第一次遇见她的地方。6.Theproblemis

.问题是谁才真正适合做这份艰苦的工作。7.Thatis

.那就是我想让你在这儿工作的原因。8.Iwaslateforschoolthismorning.

lastnight.今天早上我上学迟到了。那是因为我昨晚睡得太晚了。whereIfirstmetherwhoisreallyfitforthehardjobwhyIwantyoutow