（新版）人教新目标版九年级英语全册Unit13We’retryingtosavetheearthSectionA3

Unit13Weretryingtosavetheearth!,SectionA3GrammarFocus-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.,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。,Whatafinedaytoday!Look!Whataretheydoing?,Exercise,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,4c,Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.,usepublictransportation(n.交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins(餐巾纸);recyclebooksandpaper,Discussion,Ithinkthateveryoneshouldusepublictransportation.,Idisagree.Itsdifficultforparentswithyoungchildrentousepublictransportation,1.Wecantaffordtowaitanylongertotakeaction!affordv.承担得起;提供,给予affordtodosth.(常与can,beableto连用)买得起;有足够的e.g.Wecantaffordtopaysuchaprice.我们付不起这个价钱。Dancingaffordsuspleasure.跳舞给我们带来快乐。,2.saveelectricitybyturningoffthelights