七年级英语Electricity课件

Unit4ElectricityReadingelectricityn.电electriciann.

电工ThereisaproblemwiththeelectricityinTom’sflat.Anelectricianhascometodealwithit.

electrica.电的

electricstormelectricshock

electricala.电气科学的electricalapparatus电器electricalengineer

WordsandexpressionsinReadingAWhatdoyouknowabout:changev/n.变化Wecan’tseeelectricity,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."Themoretheyoungstudentsworked,themoreenergetictheybecame."

这些年青学生们越干越有劲。abaccccontainpolitelyinawayflowstrick:v/n

戏弄,欺骗It’swrongtotrickothers.=It’swrongtofoolothers=It’swrongtoplaytricks(atrick)onothers.=It’swrongtoplayjokes(ajoke)onothers2.

atlast=intheend=finallyIfinishedmyworkatlast.Ifinishedmyworkintheend.Ifinishedmyworkfinally.3.flowthrough

Elctricityflowsthroughawire.It’slikewater,inaway.

WordsandexpressionsinReadingB:

4.looklike=belike

1.Helookslikehisfather.=Heislikehisfather.2.----What’shelike?=Whatdoeshelooklike?----Heisshortandfat.5.inaway(partly)在某种程度上,稍稍Inaway,Iagreewithhim.Someofhisideasarerightbytheway

Bytheway,canyoutellmewhenwewillleave?intheway

Thetableisintheway.Pleasemoveit.ontheway

Onthewaytoschool,IsawKen.inthisway

Ihavecollectedmanystampsinthisway.

6.

explainv.explanationn.Canyouexplainittome?=Canyougiveanexplanationaboutittome?7.formv.组成＆n.形式1.Mikeformedafootballteaminhisclasswithhisclassmateslastterm.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ConnectmewithBeijingUniversity.给我接北京大学。9buryv.buriedburied

Whenpeopledied,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.看电缆联结在一起8.电灯泡9.挠头10.不同形式的能量11.发电站

changeintotricksbatlastlookfoolishflowthroughinawaybeconnectedtocablesalightbulbscratchone’sheaddifferentformsofenergyapowerstationme=BennyIt=electricityit=electricityThey=cablesThey=batterieswirecablestreetpowerstationYesIwasabletotrickDaisyatlastNOWecan’tseeelectricity,butwecan

changeitintodifferentformsofenergyNOWhoislookingfoolishnow,BennyListeningUnderstandingthemainpointsofadialogueThereisaproblemwiththeelectricityinBenny’sflat.Anelectriciancametodealwiththisproblem.ListentotheconversationbetweentheelectricianandBenny’smother.Findoutwhichthingswereonoroffwhentheelectricitystopped,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

kettlewashingmachinetelevisionvacuumcleanerricecookeriron★Language情态动词情态动词不能单独作谓语动词，后接其它动词原形做谓语，没有人称和数的变化。表示能够或不能做某事用can或can’tAbirdcanfly.Fishcan’tlivewithoutwater.2.告诉人们必须或禁止做某事用must或mustn’t

Youmusthandinyourhomeworkatonce.Youmustn’ttalkloudlyinpublic.3.表示请求或允许做某事may或can

MayIcomein?CanIopenthedoor?4.谈论该做或不该做某事用should,oughtto或shouldn’t,oughtnotto

Sheshoulddoherhomeworkfirst.Theyoughttofinishtheworkontime.theyoughtnottobelateforschool.★★★Notes:1、can和beableto的区别:beableto有人称数和时态的变化。Icancometomorrow.Iwillbeabletocometomorrow.2、在答复must的疑问句时，否认答复常用needn’t或don’thaveto表示不必，而不用mustn’t。Mustwestayhere?No,youneedn’t.(No,youdon’thaveto.)3、mustbe表示肯定的猜测，意为“一定……”can’tbe表示否认的猜测，意为“不可能……”Shemustbeanurse.Isawherinthelibraryjustnow.Shecan’tbehere.4、musthavedone也表示肯定的猜测，意为“一定做过……”Theymusthavecleanedtheroom.It’ssoclean.他们一定清扫过房间了，它这么干净。Ⅰ.用适当的情态动词填空：。1.__________youswim?2.We___________operatethemachinelastweek,butwecanoperateitnow.3.Don’tworry.You_____returnmethisbooktomorrow.4.Hesaidifhe_________askmeanotherquestion.5.Mygrandmaisill.You_____talksoloudlyhere.6.Ican’tplaywithyou.I__________finishmyhomeworkfirst.7.I__________getupearlytomorrow.8.______________youpleaseopenthewindow?

Cancouldn’tmaycouldcan’tmustmustCould9.Nobody___________livewithoutair.10._________hespeakChinese?Yes,alittle.11.Thebook_________bereturnedbeforeSaturday.12.__________Icomein?Yes,please.13.You________giveupsmokingatonce.It’sbadforyoureyes.14.Excuseme._________Iaskyouaquestion?15.__________youtellmewherethestationis?16.______Ifinishtheworknow?No,you_________.You_____doitthisevening.17.MayIuseyoure-dictionary?Sorry,you_________.Iamusingitnow.18.Lookattheground.It’sverywet.It_______haverainedlastnight.canCanmustCan/MaymustMay/CanCan/CouldMustneedn’tcan/maycan’tmust同义句改写:1.Youmustcleanyourroomyourself.You__________________cleanyourroomyourself.2.Shecandancebeautifully.She________________________dancebeautifully.3.Washyourfaceatonce.You_______washyourface________.4.Tomcouldn’tfindhisbag.He________not________________tofindhisbag.5.Everyoneoughttobehereontime.Everyone_____________________hereontime.

haveto

isableto

must

were

abletoshouldbe

immediately

Fillintheblankswiththewordsgivenintheirproperforms:1.TheweatherinLondonis____________.(change)2.Pleasewaitformeatthemain_______tothemuseum.(enter)3.Airis___________.(visible)4.Thescientistsfoundsomemummies_______underthepyramids.(bury)5.Canyou________ittomeagain?Ican’tunderstandit.(explanation)6.Idon’tfeellike_________footballinthestreet.(play)7.Ipreferthiskindofcloth.Itfeels________.(smoothly)8.A:Hemustbeintheoffice.B:He_______bethere.Isawhimtalkingtohisfriendintheclassroomjustnow.(can,may,must)

changeableentranceinvisibleburiedexplainplayingsmoothcan’t9.Therainstoppedusfrom_____