九年级英语 Unit 13 Section A(4a-4c)

.,Unit13Wearetryingtosavetheearth!,SectionAGrammarFocus-4c,.,Revision,不同种类的污染2.河底3.把垃圾扔到河里4.在中起作用,differentkindsofpollution,thebottleoftheriver,throwrubbishintotheriver,playapartin,I.Checkifyouknowthesephrases.,.,5.在中国南部6.对有害7.在顶部8.海洋生态系统,insouthernChina,beharmfulto,atthetopof,theoceansecosystem,.,II.Translatethesentences.,1.甚至是河底都满是垃圾。2.这个方法不仅残酷还对环境有害。,Eventhebottomoftheriverwasfullofrubbish.,Thismethodisnotonlycruel,butalsoharmfultotheenvironment.,.,3.鲨鱼处于海洋食物链的顶部。4.许多人相信鱼翅对健康有好处。,Sharksareatthetopofthefoodchainintheoceansecosystem.,Alotofpeoplebelievethatsharksfinsaregoodforhealth.,.,takepartinaffordturnoffreusablepayfortakeactiontransportation,参加v.买的起；承担的起（后果）关掉adj.可重复使用的付费；付出代价采取行动n.运输业；交通运输,.,辨析：join,joinin和takepartin,to,.,Willyoujoinusinthediscussion?你参加我们的讨论吗？ShejoinedtheYoungPioneers.她加入了少先队。Whydidntyoujoininthetalklastnight?昨晚你为什么没参加座谈？Didyoutakepartinthesportsmeet?你参加运动会了吗？,.,afford是动词，意为“买得起,担负得起”，通常与can,could,beableto连用,多用于否定句中。Theycouldntafford$50foraticket.他们拿不出50美元买一张票。afford后面常跟带to的动词不定式。Wecantaffordtogoabroadthissummer.今年夏天我们没有足够的钱出国。例句：MissTaylorneverwastesmoneyonanythingtooexpensive,eventhoughshecan_to.Shehasdonatedmuchofthemoneyshesavedtocharities.A.affordB.allowC.remindD.pay,afford,.,Payattentiontothesentences.1.Weretryingtosavetheearth.2.Theriverusedtobesoclean.3.Theairisbadlypolluted.4.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.5.Weshouldhelpsavethesharks.,Presentprogressive,usedto,Passivevoice,Presentperfect,GrammarFocus,Modalverbs,.,现在进行时:PresentProgressive,结构:be(am/is/are)+v.-ing标志词：Look,Listen,now,rightnowe.g.Look!Theboyiscrying.,定义：表示说话时(瞬间)正在进行的动作,也表示目前或现阶段正在进行的动作。,.,usedtodosth.表示过去常常做某事,而现在往往不做了,后接动词原形。beusedtodoingsth.表示习惯于做某事e.g.Iusedtogetupatsixoclock.Joeisusedtodrinkingacupofcoffeeeverymorning.,usedtodo与beusedtodoing,.,Translation.1.她过去常常周末和朋友闲逛。Sheusedtohangoutwithfriendsonweekends.2.他习惯于每天晚上睡得很晚。Heisusedtostayingup.,Exercise,.,被动语态：Passivevoice,定义：表示主语是动作的承受者，即行为动作的对象的一种语态。结构：be+过去分词e.g.Anewschoolwasbuiltlastyear.Ourclassroomiscleanedeveryday.,.,TranslatethesentencesbyusingPassivevoice.1.刚才一些老年人参观了博物馆。2.工人们使用不同种类的机器工作。,Themuseumwasvisitedbysomeoldpeoplejustnow.,Differentkindsofmachinesareusedtoworkbytheworkers.,Exercise,.,结构:has/have+过去分词标志词：already,yet,ever,never,since,fore.g.Ihaventfinishedmyhomeworkyet.,定义：表示动作已经完成,但对现在造成影响;或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。,现在完成时:PresentPerfect,.,Completethefollowingsentences.I_(be)inBeijingfortwoyears.2.I_never_(hear)ofthatmanbefore.3.Tom_(work)theresincetwoyearsago.,havebeen,have,heard,hasworked,Exercise,.,4.Thetwins_(wash)theclothesforanhour.5.He_(play)basketballsincethreeyearsago.6.Howlong_Sally_(sing)yet?,havewashed,hasplayed,has,sung,.,1.情态动词本身有一定的词义,表示说话人的情绪、态度或语气,但不能单独作谓语,只能与其他动词构成谓语。常见的有:can(could),may(might),must,need,shall(should),will(would)等。,情态动词,.,2.情态动词无人称和数的变化,后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。e.g.Kencanclimbupthetresslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustntplaywithfire.Itisdangerous.,.,Translation.1.我们不能在教室里吃东西。2.首先你必须完成作业。3.他现在不可能在家。4.她一定知道这个问题的答案。,Exercise,Wecanteatintheclassroom.,Youmustfinishyourhomeworkfirst.,Hecantbeathomenow.,Shemustknowtheanswertothisquestion.,.,4a,Fillintheblankswiththecorrectformsoftheverbsinbrackets.,Joe:_youever_(take)partinanenvironmentalproject?Eric:Yes,Ihave.I_(help)withaClean-UpDaylastyear.Itwas_(consider)thebiggestclean-upprojectthiscity_ever_(have).,Have,taken,helped,considered,had,had,参加,.,Joe:Howmanypeople_(take)part?Eric:I_(think)morethan1,000people_(come)tohelpout.Joe:Thatsfantastic!Iguesseveryoneinthiscityis_(try)toimprovetheenvironment.Eric:Yes,wecantaffordto_(wait)anylongertotakeaction!,took,think,came,trying,wait,v.承担得起(后果);买得起,.,4b,Fillintheblankswiththeappropriatemodalverbsfromthebox.,People_thinkthatbigthings_bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you_save,may/might,must,can,canwouldcouldhavetoshouldmustmay/might,.,electricitybyturningoffthelightswhenyouleavearoom.You_alsousereusablebagsinsteadofplasticbags.Ithinkitsagreatideathatyounow_payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_rideyourbikeorwalk.Ifitsfar,you_takethebus.Allthese,could,haveto,can/should,can/could,关掉,adj.可重复使用的,付费;付出代价,.,smallthings_addupandbecomebigthingsthat_improvetheenvironment.Letstakeactionnow!,could,would/can,采取行动,.,Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.,4c,.,Discussing.,.,.,.,.,.,.,练习题,.,情态动词练习,1.-_youpassmeapen?Idliketowritedownthephonenumber.-Sure.Hereitis.A.CanB.NeedC.MightD.Must2.-MayIgotothecinema,Mum?-Certainly,butyou_bebackby11oclock.A.canB.mayC.mustD.need3.You_worryaboutme.Itsnothingserious.A.cantB.mustntC.needntD.wont,.,4.-Excuseme.IsthistherightwaytotheSummerPalace?-Sorry,Imnotsure.Butit_be.A.mightB.mustntC.cantD.must5.Themanintheoffice_beMr.Black,becausehewenthomejustnow.A.musntB.maynotC.cantD.neednt,.,useto练习,A她过去常常周末和朋友闲逛。She_withfriendsonweekends.B他习惯于每晚睡得很晚。He_atnight.C.Kenusedtobeafraidofdogs.(改为一般疑问句)_?,usedtohangout,isusedtosleepinglate/stayingup,DidKenusetobeafraidofdogs,.,1.Hepromisedtopickmeupattheschoolgate.However,he_yet.A.didntarriveB.doesntarriveC.isntarrivingD.hasntarrived2.BaJin,oneofthegreatestwritersinChina,_as“PeoplesWriter”.A.isregardedB.hasregardedC.isregardingD.regards,Choosethebestanswer.,.,3.WhereisTom?He_inhisroom.A.isreadingB.readsC.readD.wasreading4.MayIgooutnow,Dad?No.You_letyourmotherknowfirst.A.canB.mayC.needD.must,.,5.Herson_coke,butnowhe_milk.A.usedtodrink;isusedtodrinkingB.usedtodrinking;drinksC.isusedtodrinking;usedtodrinkD.isusedtodrink;isdrinking,.,1.(2013江苏淮安)Itsgettingdark.Please_thelight.A.turnonB.turnoffC.turndownD.turnaround2.(2013湖北随州)HowdoesJackusuallygotowork?He_driveacar,butnowhe_theretolosewei