七年级英语Electricity课件.ppt

1、Unit4Electricity,Reading,electricityn.电electriciann.电工ThereisaproblemwiththeelectricityinTomsflat.Anelectricianhascometodealwithit.electrica.电的electricstormelectricshockelectricala.电气科学的electricalapparatus电器electricalengineer,WordsandexpressionsinReadingAWhatdoyouknowabout:,changev/n.变化Wecantseeelec

2、tricity,butwecanchangeitintoenergy.GreatchangeshavetakenplaceinShenzhensince1980.changeablea.Theweatherischangeableontopofthemountain.n.找头；（找回的）零钱Hereisyourchange.,energyn.Youngpeopleusuallyhavemoreenergythantheold.年轻人通常比老年人有活力。energetica.1.Heisanenergeticboy;heenjoyssports.2.Themoretheyoungstudents

3、worked,themoreenergetictheybecame.这些年青学生们越干越有劲。,a,b,a,c,c,c,contain,politely,inaway,flows,trick:v/n戏弄,欺骗Itswrongtotrickothers.=Itswrongtofoolothers=Itswrongtoplaytricks(atrick)onothers.=Itswrongtoplayjokes(ajoke)onothers2.atlast=intheend=finallyIfinishedmyworkatlast.Ifinishedmyworkintheend.Ifinished

4、myworkfinally.,3.flowthroughElctricityflowsthroughawire.Itslikewater,inaway.,WordsandexpressionsinReadingB:,4.looklike=belike1.Helookslikehisfather.=Heislikehisfather.2.-Whatshelike?=Whatdoeshelooklike?-Heisshortandfat.5.inaway(partly)在某种程度上,稍稍Inaway,Iagreewithhim.SomeofhisideasarerightbythewayBythe

5、way,canyoutellmewhenwewillleave?inthewayThetableisintheway.Pleasemoveit.onthewayOnthewaytoschool,IsawKhiswayIhavecollectedmanystampsinthisway.,6.explainv.explanationn.Canyouexplainittome?=Canyougiveanexplanationaboutittome?7.formv.组成n.形式1.Mikeformedafootballteaminhisclasswithhisclassmateslastt

6、erm.2.Wecanchangeitintodifferentformsofenergy.3.Shehasatallgracefulform.她有着高大优雅的外形。,8beconnectedto1.Thewiresinourflatareconnectedtocablesburiedunderthestreet.2.HongKongandShenzhenareconnectedbyLuohuBridge.connectv.1.（常与to,with连用）连接；结合；连结Willyouconnectthiswiretothetelevision?你把这根电线和电视机连上好吗？2.接通电话Conn

7、ectmewithBeijingUniversity.给我接北京大学。,9buryv.buriedburiedWhenpeopledied,theyareusuallyburied.,10.cablen.电缆wire:n.电线Computersareconnectedwitheachotherbymeansofcables.,11.containv.包含；容纳；装有Beercontainsalcohol.啤酒含有酒精。Theenvelopcontainssomephotosofherfamily.,Phrases:1.转化,变成2.戏弄某人3.最后4.看上去很傻5.流经6.某种意义上7.看电缆

8、联结在一起8.电灯泡9.挠头10.不同形式的能量11.发电站,changeinto,tricksb,atlast,lookfoolish,flowthrough,inaway,beconnectedtocables,alightbulb,scratchoneshead,differentformsofenergy,apowerstation,me=Benny,It=electricity,it=electricity,They=cables,They=batteries,wire,cable,street,powerstation,Yes,IwasabletotrickDaisyatlast,

9、NO,Wecantseeelectricity,butwecan,changeitintodifferentformsofenergy,NO,Whoislookingfoolishnow,Benny,Listening,Understandingthemainpointsofadialogue,ThereisaproblemwiththeelectricityinBennysflat.Anelectriciancametodealwiththisproblem.ListentotheconversationbetweentheelectricianandBennysmother.Findout

10、whichthingswereonoroffwhentheelectricitystopped,andcircleONorOFFnexttotheobjects.Beforeyoulisten,makesureyouknowthefollowingwords:Vacuumv.用真空吸尘器清扫properlyadv.正确地,恰当地Ironv.熨,烫平plugn.插头,lightsairconditionerfridge,kettlewashingmachinetelevision,vacuumcleanerricecookeriron,Language情态动词,情态动词不能单独作谓语动词，后接其

11、它动词原形做谓语，没有人称和数的变化。,表示能够或不能做某事用can或cantAbirdcanfly.Fishcantlivewithoutwater.2.告诉人们必须或禁止做某事用must或mustntYoumusthandinyourhomeworkatonce.Youmustnttalkloudlyinpublic.,3.表示请求或允许做某事may或canMayIcomein?CanIopenthedoor?4.谈论该做或不该做某事用should,oughtto或shouldnt,oughtnottoSheshoulddoherhomeworkfirst.Theyoughttofinis

12、htheworkontime.theyoughtnottobelateforschool.,Notes:1、can和beableto的区别:beableto有人称数和时态的变化。Icancometomorrow.Iwillbeabletocometomorrow.2、在回答must的疑问句时，否定回答常用neednt或donthaveto表示不必，而不用mustnt。Mustwestayhere?No,youneednt.(No,youdonthaveto.)3、mustbe表示肯定的猜测，意为“一定”cantbe表示否定的猜测，意为“不可能”,Shemustbeanurse.Isawheri

13、nthelibraryjustnow.Shecantbehere.4、musthavedone也表示肯定的猜测，意为“一定做过”Theymusthavecleanedtheroom.Itssoclean.他们一定打扫过房间了，它这么干净。,.用适当的情态动词填空：。1._youswim?2.We_operatethemachinelastweek,butwecanoperateitnow.3.Dontworry.You_returnmethisbooktomorrow.4.Hesaidifhe_askmeanotherquestion.5.Mygrandmaisill.You_talksolo

14、udlyhere.6.Icantplaywithyou.I_finishmyhomeworkfirst.7.I_getupearlytomorrow.8._youpleaseopenthewindow?,Can,couldnt,may,could,cant,must,must,Could,9.Nobody_livewithoutair.10._hespeakChinese?Yes,alittle.11.Thebook_bereturnedbeforeSaturday.12._Icomein?Yes,please.13.You_giveupsmokingatonce.Itsbadforyoure

15、yes.14.Excuseme._Iaskyouaquestion?15._youtellmewherethestationis?16._Ifinishtheworknow?No,you_.You_doitthisevening.17.MayIuseyoure-dictionary?Sorry,you_.Iamusingitnow.18.Lookattheground.Itsverywet.It_haverainedlastnight.,can,Can,must,Can/May,must,May/Can,Can/Could,Must,neednt,can/may,cant,must,同义句改写

16、:1.Youmustcleanyourroomyourself.You_cleanyourroomyourself.2.Shecandancebeautifully.She_dancebeautifully.3.Washyourfaceatonce.You_washyourface_.4.Tomcouldntfindhisbag.He_not_tofindhisbag.5.Everyoneoughttobehereontime.Everyone_hereontime.,haveto,isableto,must,wereableto,shouldbe,immediately,Fillintheb

17、lankswiththewordsgivenintheirproperforms:1.TheweatherinLondonis_.(change)2.Pleasewaitformeatthemain_tothemuseum.(enter)3.Airis_.(visible)4.Thescientistsfoundsomemummies_underthepyramids.(bury)5.Canyou_ittomeagain?Icantunderstandit.(explanation)6.Idontfeellike_footballinthestreet.(play)7.Ipreferthisk

18、indofcloth.Itfeels_.(smoothly)8.A:Hemustbeintheoffice.B:He_bethere.Isawhimtalkingtohisfriendintheclassroomjustnow.(can,may,must),changeable,entrance,invisible,buried,explain,playing,smooth,cant,9.Therainstoppedusfrom_toschool.(go)10.Whenhecameintotheoffice,hefoundhisstaffbusy_.(work)11.Dont_outofthewindow.Itsdangerous.(lean)12.Thesewiresare_tothecablesburiedundertheground.(connection)13.Thatsnotabad_.(explain)14.Electricitycomesfroma_station.(powerful)15.Longago,whenpeopledied,theyareusually_.(bury)16.Donttouchthewire.Youwillgetan_shock.(electri