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Unit8We*retryingtosavetheearthCheckifyouknowthesephrases.
①不同种类的污染
③把垃圾扔到河里
⑤在中国南部
⑦在……顶部
②河底
④在…中起作用
⑥对……有害
⑧海洋生态系统TranslatethesesentencesintoEnglish.
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
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GrammarFocusPayattentiontothesentences.We*rctryingtosavetheearth.Theriverusedtobesoclean.Theairisbad1ypolluted.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.
1.现在进行时PresentProgressive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一直进行的动作结构beam/is/are+v.-ing标志词LookListennowrightnow-e.g.Look!Theboyiscrying..usedtodo与beusedtodoingusedtodosth.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c.g.Iusedtogetupatsixoclock.Joeisusedtodrinkingacupofcoffeeeverymorning..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..现在完成时PresentPerfect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结构has/have+过去分词标志词alreadyyeteverneversincefor…e.g.Ihaven*tfinishedmyhomeworkyet..情态动词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cancouldmaymightmustneedshallshouldwillwould等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.PracticeWorkon4a.Fillintheblankswiththecorrectformsoftheverbsinbrackets.Joe:youevertakepartinanenvironmentalprojectEric:YesIhave.IhelpwithaClean-UpDaylastyear.Itwasconsiderthe.biggestclean-upprojectthiscityeverhave.Joe:HowmanypeopletakepartEric:Ithinkmorethan1000peoplecometohelpout.Joe:Thatsfantastic!Iguesseveryoneinthiscityistrytoimprovetheenvironment.Learnsomenewwordsandexpressions.Workon4b.Fillintheblankswiththeappropriatemodalverbsfrojnthebox.Thewordsare:canwouldcouldhavetoshouldmustmay/mightPeoplethinkthatbigthingsbedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexampleyousaveelectricitybyturningoffthelightswhenyouleavearoom.Youalsousereusablebagsinsteadofplasticbags.Ithinkitsagreatideathatyounowpayforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorworkyourideyourbikeorwalk.Ifitsfaryoutakethebus.Allthesesmallthingsaddupandbecomebigthingsthatimprovetheenvironment.Letstakeactionnow!Learnsomenewwordsandexpressions.Workon4c.Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyour1istwithyourpartnerusepublictransportation(〃.交通运输);turnoffthelightswhenyouleavearoom;usereusablebagsinsteadofplasticbags;rideyourbikeorwalktoschoolorwork;stopusingpapernapkins;recyclebooksandpaper•••Discussion.Ithinkthateveryoneshouldusepublictransportation.Idisagree.Itsdifficultforparentswithyoungchildrentousepublictransportation---LanguagepointsWecan*taffordtowaitanylongertotakeaction!affordv承担得起;提供,给予affordtodosth.(常与canbebleto连用)买得起;有足.够的…,e.g.Wecan*taffordtopaysuchaprice.我们付不起这个价钱Dancingaffordsuspleasuie.跳舞给我们带来快乐•••saveelectricitybyturningoffthelightswhenyouleavearoom.turningoff关掉e.g.Pleaseturnthetelevisionoffbeforeyougotobed.睡觉前.请,关掉电视拓展turn相关短语turnaroundturnupturndownturnintoturnonturnoffturnouttobeturnoverHomeworkFinishtheexercisesintheworkbook.。