Unit13SectionA(grammar-4c)课件人教版九年级英语全册

Unit13We’retryingtosavetheearth.SectionA(grammar-4c)ToreviewtheuseofPresentprogressive,usedto,Passivevoice,PresentperfectandModalverbs.Tomasterthembydoingsomeexercises.

不同种类的污染2.河底3.把垃圾扔到河里4.在……中起作用5.在中国南部6.对……有害7.在……顶部8.海洋生态系统differentkindsofpollutionthebottomoftheriverthrowrubbishintotheriverplayapartinI.Checkifyourememberthesephrases.insouthernChinabeharmfulto

atthetopof…theocean’secosystemII.Translation.1.这不仅残酷还对环境有害。Thisisnotonlycruel,butalsoharmfultotheenvironment.2.鲨鱼处于海洋食物链的顶部。3.许多人相信鱼翅对健康有好处。Sharksareatthetopofthefoodchainintheocean’secosystem.Alotofpeoplebelievethatsharkfinsaregoodforhealth.Wearetrytosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharksfinsaregoodforhealth.PresentperferctWeshouldsavethesharks.ModelverbsGrammarFocus现在进行时:Presentprogressive结构:be(am/is/are)+v.-ing形式标志词：Look,Listen,now,rightnow…e.g.

Listen!Theboyissinging.It’salwaysraininghere.(抱怨情绪)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，或说话者的强烈情感。v.-ing形式(现在分词)的构成：a.一般情况下在动词词尾加-ing。b.以不发音的e结尾的动词，去掉e加-ing。c.以一个辅音字母结尾的重读闭音节，双写最后一个字母，再加-ing。usedtodosth.

过去常常做某事(而现在不做了)1)否定句式：didn’tusetodosth.2)一般疑问句式：Did+主语+usetodosth.?3)附加疑问句式：…,didn’t+主语?e.g.Heusedtoeatsharkfinsoup.Hedidn’tusetoeatsharkfinsoup.Heusedtoeatsharkfinsoup,didn’the?usedtodo&beusedtodoingLet’sreview.被动语态表意功能讲话者不知道动作的执行者，不必或不便说出动作的执行者（这时可省掉by引导的短语）借助被动的动作突出动作的承受者为了更好的安排句子，用于修辞当动作的执行者是无生命的事物时，需用被动语态用法有些动词习惯被动语态，如born,report,say等Let’sreview.被动语态结构一般时进行时完成时时态现在am/is/are+过去分词过去was/were+过去分词将来will/shallbe+过去分词过去将来would/shouldbe+过去分词现在am/is/arebeing+过去分词过去was/werebeing+过去分词现在have/hasbeen+过去分词过去hadbeen+过去分词将来will/shallhavebeen+过去分词过去将来would/shouldhavebeen+过去分词Let’sreview.被动语态结构不同结构的被动语态肯定句式被动语态的基本结构是：主语+be动词+过去分词+其他。否定句式被动语态的基本结构是：主语+be动词+not+过去分词+其他。一般疑问句式被动语态的基本结构是：Be动词+主语+过去分词+其他。特殊疑问句被动语态的基本结构是：特殊疑问词+be动词+主语+过去分词+其他。get+过去分词这个要强调动作的发生，基本结构是：主语+get+过去分词+其他。有情态动词的被动语态基本结构是：主语+情态动词+be+过去分词+其他。Joe:_____youever_____(take)partinan

environmentalproject?Ken:Yes,Ihave.I_____(help)withaClean-Up

Daylastyear.Itwas_________(consider)

thebiggestclean-upprojectthiscityever

________(have).

Fillintheblankswiththecorrectformsoftheverbsinbrackets.4aHavetakenhelpedconsideredhadhadtookthinkcametryingwaitFillintheblankswiththeappropriatemodalverbsfromthebox.People______________thinkthatbigthings_____________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you________________saveelectricitybyturningoffthelightswhenyouleavearoom.You________________alsousereusablebagsinsteadofplasticbags.may/mightmust/havetocan,would,could,haveto,should,must,may/mightcan/could/shouldcan/could/shouldhavetocan/could/shouldcan/couldcan,would,could,haveto,should,must,may/mightcan/couldcan/could/wouldMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.usepublictransportation(n.交通运输)turnoffthelightswhenyouleavearoomtakeyourownshoppingbagswhenyougoshoppingdon’tusedisposable(adj.

一次性的)itemslikedisposablecutlery(n.餐具),cameras,etc.reducetheuseofairconditionersinsummergrowmoreplants…

用方框中词的适当形式完成下面的句子。(1)Ithinkit’s____tomakesuchayoungboyworkallday.(2)Thepoorfishermancan’t_____hischildren’seducation.(3)Ithinkthegovernmentmustdevelop_____toprotectenvironment.(4)Eatingtoomuchjunkfoodis_______yourhealth.(5)Hecanusedifferent_______toworkouttheproblem.method,cruel,harmful,afford,lawcruelaffordlawharmfulmethodII.单项选择。1.—Areyougoingto_____anyoftheevents?—Yes.Maybelongjumpandhighjump.

A.takepartin B.join C.attend D.joinin2.Ican’tafford____himanexpensivebirthdaypresent. A.tobuy B.buying C.forbuying D.buy3.—Rememberto____thelightswhenyouleavetheroom.—OK.Iwill. A.turnon B.turndown C.turnup D.turnoff4.Thegirlalwayshassomemoneyto___snacks. A.spend B.payfor C.take D.cost5.—Look!_____boysareplayingonthe

playground.—Yes._____themisabout200. A.Thenumberof;Anumberof B.Thenumberof;Thenumberof C.Anumberof;thenumberof D.Anumberof;Anumberof用所给词的适当形式填空。1.Theoldmanused_____(be)ateacher.2.Weshould_____(clean)theroomeveryday.3.Look!Tom_________(sleep)inhisroom.4.Lotsoftrees__________(plant)onthehill

everyyear.5.He_________(live)herefor20years.tobecleanissleepingareplantedhaslivedIII.根据汉语提示完成句子。1.我们必须采取行动来阻止他们。

Wemust___________tostopthem.2.我从没听说过这个人。