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1、1.不同种类的污染不同种类的污染2.河底河底3.把垃圾扔到河里把垃圾扔到河里4.在在中起作用中起作用differentkindsofpollutionthebottleoftheriverthrowrubbishintotheriverplayapartinI. Check if you know these phrases.5.在中国南部在中国南部6.对对有害有害7.在在顶部顶部8.海洋生态系统海洋生态系统insouthernChinabeharmfulto atthetopoftheoceansecosystemII. Translate the sentences.II. Transla
2、te the sentences.1.甚至是河底都满是垃圾。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。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。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。许多人相信鱼翅对健康有好处。Sharksareatthetopofthefoodchainintheoceansecosystem.Alotofpeoplebelieveth
3、atsharksfinsaregoodforhealth.Pay attention to the sentences.1.Weretryingtosavetheearth.2.Theriverusedtobesoclean.3.Theairisbadlypolluted.4.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.5.Weshouldhelpsavethesharks.Present progressiveused toPassive voicePresent perfectModal verbs现在进行时现在进行时
4、: :PresentProgressive结构结构:be(am/is/are)+v.-ing标志词：标志词：Look,Listen,now,rightnowe.g.Look!Theboyiscrying.定义：定义：表示说话时表示说话时(瞬间瞬间)正在进行正在进行的动作的动作,也表示目前或现阶也表示目前或现阶段正在进行的动作。段正在进行的动作。What a fine day today! Look! What are they doing?usedtodosth.表示过去常常做某事表示过去常常做某事,而现而现在往往不做了在往往不做了,后接动词原后接动词原形。形。beusedtodoingsth
5、.表示习惯于做某事表示习惯于做某事e.g.Iusedtogetupatsixoclock.Joeisusedtodrinkingacupofcoffeeeverymorning.usedtodo与与beusedtodoingTranslation.1.她过去常常周末和朋友闲逛。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。他习惯于每天晚上睡得很晚。Heisusedtostayingup.被动语态：被动语态：Passivevoice定义：定义：表示主语是动作的承受者，即行表示主语是动作的承受者，即行为动作的对象
6、的一种语态。为动作的对象的一种语态。结构：结构：be+过去分词过去分词e.g.Anewschoolwasbuiltlastyear. Ourclassroomiscleanedeveryday.Translate the sentences by using Passive voice.1.刚才一些老年人参观了博物馆。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。工人们使用不同种类的机器工作。Themuseumwasvisitedbysomeoldpeoplejustnow.Differentkindsofmachinesareusedtoworkbytheworkers.结构
7、结构:has/have+过去分词过去分词标志词：标志词：already,yet,ever,never,since,fore.g.Ihaventfinishedmyhomeworkyet.定义：定义：表示动作已经完成表示动作已经完成,但对现在造成影但对现在造成影响响;或者表示从过去某一时间开始一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直延续到现在并还可能持续下去的动作。动作。现在完成时现在完成时:PresentPerfectComplete the following sentences.1.I_(be)inBeijingfortwoyears.2.I_never_(hear)
8、ofthatmanbefore.3.Tom_(work)theresincetwoyearsago.havebeenhaveheardhasworked4.Thetwins_(wash)theclothesforanhour.5.He_(play)basketballsincethreeyearsago.6.Howlong_Sally_(sing)yet?havewashedhasplayedhassung1.情态动词本身有一定的词义情态动词本身有一定的词义,表示说表示说话人的情绪、态度或语气话人的情绪、态度或语气,但不能单但不能单独作谓语独作谓语,只能与其他动词构成谓语。只能与其他动词构成谓
9、语。常见的有常见的有:can(could),may(might),must,need,shall(should),will(would)等。等。情态动词情态动词2.情态动词无人称和数的变化情态动词无人称和数的变化,后接动词后接动词原形。否定式是在情态动词后面加原形。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个别情态动词有过去式形式,可用来表可用来表达更加客气、委婉的语气。达更加客气、委婉的语气。e.g.Kencanclimbupthetresslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustntplay
10、withfire.Itisdangerous.Translation.1.我们不能在教室里吃东西。我们不能在教室里吃东西。2.首先你必须完成作业。首先你必须完成作业。3.他现在不可能在家。他现在不可能在家。4.她一定知道这个问题的答案。她一定知道这个问题的答案。Wecanteatintheclassroom.Youmustfinishyourhomeworkfirst.Hecantbeathomenow.Shemustknowtheanswertothisquestion.4aFill in the blanks with the correct forms of the verbs in b
11、rackets.Joe:_youever_(take)partinanenvironmentalproject?Eric:Yes,Ihave.I_(help)withaClean-UpDaylastyear.Itwas_(consider)thebiggestclean-upprojectthiscity_ever_(have).Havetakenhelpedconsideredhadhad参加参加Joe:Howmanypeople_(take)part?Eric:I_(think)morethan1,000people_(come)tohelpout.Joe:Thatsfantastic!I
12、guesseveryoneinthiscityis_(try)toimprovetheenvironment.Eric:Yes,wecantaffordto_(wait)anylongertotakeaction!tookthinkcametryingwaitv. 承担得起承担得起( (后果后果) );买得起买得起4bFill in the blanks with the appropriatemodal verbs from the box.People_thinkthatbigthings_bedonetosavetheearth.Manyforgetthatsavingtheearthb
13、eginswithsmallthings.Forexample,you_savemay/mightmustcancanwouldcouldhavetoshouldmustmay/mightelectricitybyturningoffthelightswhenyouleavearoom.You_alsousereusablebagsinsteadofplasticbags.Ithinkitsagreatideathatyounow_payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_rideyourbikeor
14、walk.Ifitsfar,you_takethebus.Allthese couldhavetocan/shouldcan/could关掉关掉adj.可重复使用的可重复使用的付费付费;付出代价付出代价smallthings_addupandbecomebigthingsthat_improvetheenvironment.Letstakeactionnow!couldwould/can采取行动采取行动4cMake a list of things that people can do to help the environment and discuss your list with you
15、r partner.use public transportation (n.交通运输交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins(餐巾纸餐巾纸);recyclebooksandpaperIthinkthateveryoneshouldusepublictransportation.Idisagree.Itsdifficultforparentswithyoungchildrent
16、ousepublictransportation1.Wecantaffordtowaitanylongertotakeaction!affordv.承担得起承担得起;提供提供,给予给予affordtodosth.(常与常与can,beableto连用连用)买得起买得起;有足够的有足够的e.g.Wecantaffordtopaysuchaprice.我们付不起这个价钱。我们付不起这个价钱。Dancingaffordsuspleasure.跳舞给我们带来快乐。跳舞给我们带来快乐。2.saveelectricitybyturningoffthelightswhenyouleavearoom.turnoff关掉关掉e.g.Pleaseturnthetelevisionoffbeforeyougotobed.睡觉前请关掉电视。睡觉前请关掉电视。turnaround转身转身turnup调高调高(音量音量)turndown调低调低;拒绝拒绝turninto变成变成;进入进入turnon打开打开,发动发动turnoff关掉关掉,关闭关闭turnouttobe结果是结果是turnover移交移交拓展拓展:turn相关短语相关短语Finish the exercises in the workbook.
