九年级英语上册 Unit 4 Amazing Science Topic 1 When was it invented Section D课件 （新版）仁爱版.ppt

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1、Unit4AmazingScienceTopic1Whenwasitinvented?SectionDManypeopleusecomputers.Computers_____________by________________.Theworkersplanttreesinthegarden.Trees____________inthegarden____theworkers.areusedmanypeopleareplantedbyCanyoutry？你认识这些好朋友吗（英汉互译）1.explore2.mark3.system4.direction5.shape6.plan

2、et7.灯泡8.机器人9.发明10.位置；方位11.问题12.解决reviewthegrammar(page87)找一找这四组句子的共同点是什么呢？were/was+v.的过去分词A:What’sthelockmadeof?B:It’smadeofmetal.A:What’situsedfor?B:It’susedforlockingthedoor.n.锁v.（用锁）锁上，被锁住2Followtheexampletomakeupsimilarconversations.lock/metalWhat’situsedfor?It’susedforcommunicatingeasi

3、ly.Howwillyoufindyourlostcellphone?GPSislikeaman-madestar.Wecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Doyouknowhowtheearlyexplorersfindtheirposition?Let’susetheGPS.n.探险者，勘探者Teachingaims:1.复习并熟记本话题的重点单词和短语。2.复习本话题刚学过的被动语态，并根据刚学过的内容总结含有情态动词的被动语态。3.通过本课的科普文章Wherearewe?的阅读

4、，训练同学们从细节入手，培养良好的阅读习惯。1.Howdidtheearlyexplorersknowwheretheywere?Theyfoundoutwheretheywerebyusingstars.2.What’sthedisadvantageofusingthestarsasguidingmarks?Itsdisadvantageisthatitdidn’tworkwellwhentheweatherwasbadandthestarscouldnotbeseen.3.WhatisaGPS?Isitusefultouse?Itislikeaman-madestar.W

5、ecanuseitatanytime,inanyplaceandinanyweathertofindoutourposition.Itisveryuseful.4.WhatdoyouthinktheGPSwillbeusedforinthefuture?…ReadthepassageandanswerthequestionsonPage88.找一找，记一记1.查明；找出2.奏效，起作用3.其它/于时间4.人造的5.在任何时候6.只要7.可以被使用findoutworkwellTherestofthetimeman-madeatanytimeaslongascanbeused火

6、眼金睛findoutthesentenceswithpassivevoice(被动语态）考点点拨；1.Thestarscouldbeseen.2.Itcanbeusedtostudytheshapeoftheearth.仔细观察，两个句子的构成；情态动词的被动语态构成：情态动词+be+动词的过去分词Openyourmouth,youwillsucceed!Listenandreadafterthetape.根据首字母提示，完成短文。ThankstoGPS,wecanknoww_____wearenow.GPSislikeaman-made“star”.Itcanbeu____

7、inanyplaceandanyweatherconditiontofindoutourp________.Inthepast,theearlyexplorershadtousestarsinthes____totellthemwheretheywere,however,thismethoddidn’tworkwellwhentheweatherwasbad.SoGPSisagreatinventionthatcanhelphumanstobettere________ourplanets.hereos