搜索
Unit9Whenwasitinvented?SectionATalkabouttheinventions(发明）.Whichonedoyouthinkisthemosthelpfulinourdailylife?LeadinPresentation1aGROUPWORKLookatthethingsbelow.Inwhatorderdoyouthinktheywereinvented?Numberthem[1-5]123451bListenandmatchtheinventionswiththedates.abedc18761885192719711976abecd1cPAIRWORKA:Whenwasthetelephoneinvented?B:Ithinkitwasinventedin1876.JulieThompsonbattery-operatedslippersChelseaLanmonheatedicecreamscoopJayceCoziarandJamieEllsworthshoeswithadjustableheels2aListenandnumbertheinventionsintheorderthatyouhear.3122bPAIRWORKA:Whowasit/weretheyinventedby?B:Itwas/TheywereinventedbyChelseaLanmon.3aPAIRWORKMakealistoffivehelpfulinventionsandfiveannoyinginventions.HelpfulinventionsAnnoyinginventionsExample:telephoneExample:alarmclock1.1.2.2.3.3.4.4.5.5.planecomputerbikecartrainatomicbomb（原子弹）missile（导弹）rifle(步枪)chemicalweaponinstantglue(速干胶)3bPAIRWORKA:Whatdoyouthinkisthemosthelpfulinvention?B:Ithinkthemosthelpfulinventionisthelightbulb.A:Whyisthat?B:Well,itgivespeoplemoretimetoworkandplayeveryday.A:Whatdoyouthinkisahelpfulinvention?B:Ithinkitisthecar.A:Whyisthat?B:Well,itmakesitpossibleforpeopletomovetodistantplacesfaster.4GROUPWORKImagineyouareleftaloneonasmallislandinthesea.Ifyouareallowedtotakefiveinventionsalongwithyou,whatwouldyoutake?Iwouldliketotakethefollowingswithme:aknife,aflashlight,acellphone,atelescopeandagun.A:I’dliketohavearadiobecauseIcouldlistentomusicallday.B:Yes,butthat’snotgoingtohelpyouleavetheisland.Ithinkitwouldbebettertohave….Thepassivevoice.被动语态英语中动词有主动和被动两种语态，主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者，在被动语态中动作的执行者有时用by短语表示出来。一.被动语态的构成:助动词be+(及物动词的)过去分词am(is,are)+donewas(were)+done一般现在时一般过去时LanguagePoints二.被动语态的用法:1.不知道动作执行者时,常用被动语态。e.g.Mybikewasstolenyesterday.ThiscarismadeinAmerica.2.不必要说出动作执行者时,常用被动语态。e.g.Romewasnotbuiltinaday.3.为了突出强调动作的承受者时,常用被动语态。e.g.Thousandsofbeachesarepolluted.三.主动语态变为被动语态的步骤:1.把原主动句中的宾语转换为被动语态的主语。2.把动词改为被动形式，即“be+过去分词”。注意be动词要按新的主语的人称和数进行变化，时态要和原来的主动语态的时态保持一致。3.原来主动语态句中的主语，如果需要，就放在by后面以它的宾格形式出现。如果没有必要就可以省略。其他的成分(定语，状语)不变，句式也不能变。Bellinventedthetelephonein1876.ThetelephonewasinventedbyBellin1876.主动语态变被动语态的结构图:主语谓语动词过去时宾时间状语主语谓语动词的过去分词时间状语用所给动词的正确形式填空：1.Thebike__________(fix)upbyXiaoMingyesterday.2.Sunglasses__________(use)forprotectingpeople’seyes.3.Apicture_________(put)upontheblackboard.4.French___________(speak)inFrance.5.Teenagersshould__________(allow)tochoosetheirownclothes.wasfixedareusedisputisspokenbeallowedPracticeSupposeyouarealoneonatinyisland.Whatinventionswouldyouliketohaveontheislandwithyou?Writeashortpassage.HomeworkImaginationismoreimportantthanknowledge.想像力比知识更为重要。