Unit13SectionAGrammarFocus4c課件人教版九年級英語全冊

Unit13We’retryingtosavetheearth!Period3(GrammarFocus-4c)人教版九年級

LanguageGoal1.Makearevisionof“Presentprogressive”,“usedto”,“Passivevoice”,“Presentperferct”,“Modalverbs”.2.Knowhowtochoosetherighttenseindifferentsituations.Revision不同種類的污染2.河底3.把垃圾扔到河里4.在……中起作用differentkindsofpollutionthebottomoftheriverthrowrubbishintotheriverplayapartinI.Checkifyouknowthesephrases.5.在中國南部6.對……有害7.在……頂部8.海洋生態(tài)系統(tǒng)insouthernChinabeharmfulto

atthetopoftheocean’secosystemII.Translation.1.甚至河底都滿是垃圾。2.這個方法不僅殘酷，還對環(huán)境有害。Eventhebottomoftheriverwasfullofrubbish.Thismethodisnotonlycruel,butalsoharmfultotheenvironment.3.鯊魚處于海洋食物鏈的頂部。4.許多人相信魚翅對健康有好處。Sharksareatthetopofthefoodchainintheocean’secosystem.Alotofpeoplebelievethatshark’sfinsaregoodforhealth.MarkandTonydidn’tgoswimmingintheriverbecausetheriver_____(be)badlypolluted.Itwasreallydirtynow.Peopleare________(throw)litterintotheriver,andfactories____(be)also_______(put)wasteintotheriver.Infact,it________(use)besoclean,andithasalways_____thenicestriverinthistown.Tonythinksthatthey______(must/should)writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisesthateveryoneinthistown_______(must/should)helptocleanuptherivernotjustthegovernment.Fillintheblankswiththecorrectforms.wasthrowingareputtingusedtobeenshouldshouldMarkandTonydidn’tgoswimmingintheriverbecausetheriver_____badlypolluted.Itwasreallydirtynow.Peopleare________litterintotheriver,andfactories____also_______wasteintotheriver.Infact,it________besoclean,andithasalways_____thenicestriverinthistown.Tonythinkthatthey______writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisethateveryoneinthistown_______helptocleanuptherivernotjustthegovernment.wasthrowingareputtingusedtobeenshouldshouldFindPassivevoice.被動語態(tài)：Passivevoice定義：表示主語是動作的承受者，

即行為動作的對象的一種語態(tài)。結(jié)構(gòu)：be+過去分詞e.g.Anewschoolwasbuiltlastyear.

Ourclassroomiscleanedeveryday.TranslatethesentencesbyusingPassivevoice.1.剛才一些老年人參觀了博物館。2.工人們使用不同種類的機(jī)器工作。Themuseumwasvisitedbysomeoldpeoplejustnow.Differentkindsofmachinesareusedtoworkbytheworkers.MarkandTonydidn’tgoswimmingintheriverbecausetheriver_____badlypolluted.Itwasreallydirtynow.Peopleare________litterintotheriver,andfactories____also_______wasteintotheriver.Infact,it________besoclean,andithasalways_____thenicestriverinthistown.Tonythinkthatthey______writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisethateveryoneinthistown_______helptocleanuptherivernotjustthegovernment.wasthrowingareputtingusedtobeenshouldshouldFindPresentprogressive.現(xiàn)在進(jìn)行時:Presentprogressive結(jié)構(gòu):be(am/is/are)+v.-ing標(biāo)志詞：Look,Listen,now,rightnow…e.g.Look!Theboyiscrying.定義：表示說話時(瞬間)正在進(jìn)行的動作,也表示目前或現(xiàn)階段正在進(jìn)行的動作。

Whatafinedaytoday!Look!Whataretheydoing?MarkandTonydidn’tgoswimmingintheriverbecausetheriver_____badlypolluted.Itwasreallydirtynow.Peopleare________litterintotheriver,andfactories____also_______wasteintotheriver.Infact,it________besoclean,andithasalways_____thenicestriverinthistown.Tonythinkthatthey______writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisethateveryoneinthistown_______helptocleanuptherivernotjustthegovernment.wasthrowingareputtingusedtobeenshouldshouldFindusedtopattern.usedtodosth.表示過去常常做某事,而現(xiàn)在往往不做了, 后接動詞原形。beusedtodoingsth.表示習(xí)慣于做某事e.g.Iusedto

getupatsixo’clock.Joeisusedtodrinkingacupofcoffeeeverymorning.usedtodo與beusedtodoingTranslation.1.她過去常常周末和朋友閑逛。

Sheusedtohangoutwithfriendsonweekends.2.他習(xí)慣晚睡。

Heisusedtostayingup.MarkandTonydidn’tgoswimmingintheriverbecausetheriver_____badlypolluted.Itwasreallydirtynow.Peopleare________litterintotheriver,andfactories____also_______wasteintotheriver.Infact,it________besoclean,andithasalways_____thenicestriverinthistown.Tonythinkthatthey______writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisethateveryoneinthistown_______helptocleanuptherivernotjustthegovernment.wasthrowingareputtingusedtobeenshouldshouldFindPresentperfect.結(jié)構(gòu):has/have+過去分詞標(biāo)志詞：already,yet,ever,never,since,for…e.g.Ihaven’tfinishedmyhomeworkyet.定義：表示動作已經(jīng)完成,但對現(xiàn)在造成影響;或者表示從過去某一時間開始，一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動作。

現(xiàn)在完成時:PresentperfectCompletethefollowingsentences.I_________(be)inBeijingfortwoyears.2.I_____never_____(hear)ofthatmanbefore.3.Tom__________(work)theresincetwoyearsago.havebeenhaveheard

hasworked4.Thetwins___________(wash)theclothesforanhour.5.He_________(play)basketballsincethreeyearsago.6.Howlong____Sally_____(sing)yet?havewashedhasplayedhassungMarkandTonydidn’tgoswimmingintheriverbecausetheriver_____badlypolluted.Itwasreallydirtynow.Peopleare________litterintotheriver,andfactories____also_______wasteintotheriver.Infact,it________besoclean,andithasalways_____thenicestriverinthistown.Tonythinkthatthey______writetothegovernmentandletthegovernmentclosedownthefactories.Markadvisethateveryoneinthistown_______helptocleanuptherivernotjustthegovernment.wasthrowingareputtingusedtobeenshouldshouldFindModalverbs.1.情態(tài)動詞本身有一定的詞義,表示說話人的情緒、態(tài)度或語氣,但不能單獨(dú)作謂語,只能與其他動詞構(gòu)成謂語。常見的有:can(could),may(might),must,need,shall(should),will(would)等。情態(tài)動詞2.情態(tài)動詞無人稱和數(shù)的變化,后接動詞原形。否定式是在情態(tài)動詞后面加not。個別情態(tài)動詞有過去式形式,可用來表達(dá)更加客氣、委婉的語氣。e.g.Kencanclimbupthetreeslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustn’tplaywithfire.Itisdangerous.表“能力”或“許可”?？梢杂迷诜穸ň渲斜硗茰y。表“必須”，語氣較為強(qiáng)烈?？梢杂迷诳隙ň渲斜硗茰y，肯定的語氣很強(qiáng)。意為“應(yīng)該”，否定式是shouldn’t，意為“不應(yīng)該”。needshouldcouldmaycould既是can的過去式，本身也是情態(tài)動詞，語氣較為委婉。表“許可”，語氣較委婉。可以用在肯定句中表推測，肯定語氣小于must。可以作情態(tài)動詞，還可以作實義動詞。needtodosth.意為“需要做某事”。mustcanTranslation.1.我們不能在教室里吃東西。2.首先你必須完成作業(yè)。3.他現(xiàn)在不可能在家。4.她一定知道這個問題的答案。Wecan’teatintheclassroom.

Youmustfinishyourhomeworkfirst.Hecan’tbeathomenow.

Shemustknowtheanswertothisquestion.Fillintheblankswiththecorrectformsoftheverbsinbrackets.4a

Joe:______youever______(take)partinanenvironmentalproject?Ken:Yes,Ihave.I_______(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscity____ever____(have).Joe:Howmanypeople_____(take)part?Havetaken

helpedconsideredhadhadtookthinkcametryingwaitFillintheblankswiththeappropriatemodalverbsfromthebox.4b

People__________thinkthatbigthings________________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you______________saveelectricitybyturningoffthelightswhenyouleavearoom.You_______________alsousereusablebagsinsteadofplasticbags.canwouldcouldhavetoshouldmustmay/might

may/mightmust/haveto/shouldcan/could/shouldcan/could/shouldhavetocan/could/shouldcan/couldwould/can/couldcan/couldMakealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.4cIthinkthateveryoneshouldusepublictransportation.Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation…Languagepoints1.Wecan’tafford

towaitanylongertotakeaction!

affordv.

承擔(dān)得起;提供,給予

affordtodosth.(常與can,beableto連用)買得起;負(fù)擔(dān)得起e.g.Wecan’taffordtopaysuchaprice.

我們付不起這個價錢。

Dancingaffordsuspleasure.

跳舞給我們帶來快樂。Languagepoints2.…saveelectricitybyturningoffthelights whenyouleavearoom.

turnoff關(guān)掉

e.g.Pleaseturnthetelevisionoffbeforeyougotobed.

睡覺前請關(guān)掉電視。turnaround轉(zhuǎn)身turnup調(diào)高(音量)turndown調(diào)低;拒絕turninto變成;進(jìn)入turnon打開,發(fā)動turnoff關(guān)掉,關(guān)閉turnouttobe結(jié)果是turnover移交拓展:turn相關(guān)短語ExercisesI.用所給詞的適當(dāng)形式填空。1.Theoldmanused_____(be)ateacher.2.Weshould_____(clean)theroomeveryday.3.Look!Tom_________(sleep)inhisroom.4.Lotsoftrees__________(plant)onthehilleveryyear.5.He_________(live)herefor20years.tobecleanissleepingarep