英语人教版九年级全册Unit13SectionA3a-4c.ppt

Unit13,SectionA3a-4c,Weretryingtosavetheearth!,1.Whatdoyouknowaboutsharks?2.Doyouthinksharkscanbeendangered?Why?3.Whatdoyouthinkmightcauseafallinthenumberofsharks?,Thesharkisbeingkilled.,Themaniscuttingthefinoff.,Thesharksthathavenofinswillbethrownbackintotheoceanagain.,Thefinswillbedeliveredtothemarketsortherestaurants.,3aReadthepassageaboutsharksandcompletethefactsheetbelow.,SavetheSharks!Manyhaveheardofsharkfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.Butdoyourealizethatyourekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup?,听说过,鱼翅汤,中国南部,Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.Thisisnotonlycruel,butalsoharmfultotheenvironment.Withoutafin,asharkcannolongerswimandslowlydies.Sharksareatthetopofthefoodchainintheoceansecosystem.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.Manybelievethatsharkscanneverbeenendangeredbecausetheyarethestrongestintheirfoodchain.,割断，切下,残忍的,对有害的,食物链,海洋生态系统,Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.Thenumbersofsomekindsofsharkshavefallenby90percentinthelast20to30years.Environmentalprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicaboutfinning.Thenhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharkfins.Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatthem?Helpsavethesharks!,行业,野生救援协会,世界自然基金会,InsouthernChina,70million,Developlawstostopthesaleofsharkfins,WildAidandtheWWF,1.Manypeopledonotrealizetheyarekillingawholeshark_theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,_iftheirnumbersdrop,theoceansecosystemwillbeindanger.,when,so,3bReadthepassageagainandfillintheblankswiththewordsinthebox.,3.Manythinkthatsharksaretoostrongtobeendangered,_theyarewrong.4._therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday_wedonotdosomethingtostopthesaleofsharkfins.,but,Although,if,1.Whatdopeopledowhentheycatchsharks?2.Whatwillhappentoasharkwithoutafin?3.Whatdothetwoenvironmentalprotectiongroupsaskthegovernmentstodo?4.Aresharkfinsgoodforhealth?,Theycutofftheirfinsandthrowthesharkbackintotheocean.,Theycannolongerswimandslowlydies.,Todeveloplawstostopthesaleofsharkfins.,Noscientificstudieshaveshown.,1.SavetheSharks!save作动词，意为“救，拯救”，后常跟介词from。Hesavedtheboyfromthebigfire.他从大火中救出了那个男孩。Thedogsavedthegirlslife.那只狗救了女孩的命。,2.Asharkcannolongerswimandslowlydies.nolonger意思是“不再”Imnolongerastudent.我不再是个学生了。,有两个短语和nolonger同义，即notanylonger和notanymore，但他们侧重的方面不同。nolonger和notanylonger侧重时间。Henolongerliveshere.=Hedoesntlivehereanylonger.他不在这儿居住了。(一个时间以前他住在这儿，过了这个时间，他就离开了。)notanymore侧重程度和数量。Youcandrinknomore.=Youcantdrinkanymore.你不能再喝了。(喝酒的量到了一定程度，不能再继续下去了。),3.harmful形容词，意为“有害的”。常构成短语beharmfulto“对有害的”。Stayingupoftenisharmfultoyourhealth.经常熬夜对你的健康有害。【拓展】harm名词，意为“害处”。常用构成短语doharmto“对有害”，相当于beharmfulto.Toomuchsmokingdoesharmtohishealth.=Toomuchsmokingisharmfultohishealth.吸烟过多对他的健康有害。,4.Thismethodisnotonlycruel,butalsoharmfultotheenvironment.,notonlybutalso用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅而且”;其中的also有时可以省略。,Shenotonlyplayswell,butalsowritesmusic.她不但很会演奏，而且还会作曲。Notonlymenbutalsowomenwerechosen.不仅仅是男的，女的也有被选中的。,若连接两个成分作主语，其谓语通常与靠近的主语保持一致。Notonlyyoubutalsohehastoleave.不只是你，他也得离开。,notonly放在句首，后接句子时要用倒装结构。Notonlyhadthepoormanbeenfined,butalsohehadbeensenttoprison.这个可怜的人不仅被罚款，而且还被送进了监狱。,5.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.此句复数形式的numbers表达全海洋中鲨鱼的总量。当表示数值的高或低时，number要用high或low修饰。,Inthatcountry,thenumberofchildrengoingtoschoolishigherincitiesthanintownsandvillage.在那个国家，城市儿童入学人数比乡镇及农村要高。常与number搭配的动词有grow,fall等。,1.现在进行时:PresentProgressive,结构:be(am/is/are)+v.-ing标志词：Look,Listen,now,rightnowLook!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。,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Iusedtogetupatsixoclock.我以前六点钟起床。Joeisusedtodrinkingacupofcoffeeeverymorning.乔习惯每天早晨喝一杯咖啡。,2.usedtodo与beusedtodoing,3.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Anewschoolwasbuiltlastyear.Ourclassroomiscleanedeveryday.,结构:has/have+过去分词标志词：already,yet,ever,never,since,forIhaventfinishedmyhomeworkyet.,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。,4.现在完成时:PresentPerfect,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。,5.情态动词,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。Kencanclimbupthetresslikeakoala.Tracycouldrideabicyclewhenshewasfiveyearsold.Youmustntplaywithfire.Itisdangerous.,Ithinkitsagreatideathatyounow_payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you_rideyourbikeorwork.Ifitsfar,you_takethebus.Allthesesmallthings_addupandbecomebigthingsthat_improvetheenvironment.Letstakeactionsnow!,haveto,can,can,would,should,canwouldcouldhavetoshouldmustmay/might,Exercise1.根据汉语意思完成句子(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。Ihavenever_suchaman.(3)我们乐意尽力帮你摆脱困境。Wearegladtodowhatwecando_.(4)到目前为止，我已经交了二十个朋友。_,Ihavemadetwentyfriends.(5)实际上，她从没去过那儿。_,shehasneverbeenthere.,Infact,takeaction,heardof,tohelpout,Sofar,2.单项填空(1)Thegirlalwayshassomemoneyto_snacks.A.spendB.payforC.takeD.cost(2)Look!_boysareplayingontheplayground.Yes._themisabout200.A.Thenumberof；AnumberofB.Thenumberof；ThenumberofC.Anumberof；thenumberofD.Anumberof；Anumberof,B,A,(3)Areyougoingto_anyoftheevents?Yes.Maybelongjumpandhighjump.A.takepartinB.joinC.attendD.joinin(4)Icantafford_himanexpensivebirthdaypresent.A.tobuyB.buyingC.forbuyingD.buy(5)Rememberto_thelightswhenyouleavetheroom.OK.Iwill.A.turnonB.turndownC.turnupD.turnoff,A,A,D,(6).2013山东枣庄)Inthelasttenmonth,SeptemberMiracle_onCCTVformorethanfivetimesandispopularalloverthecountry.A.hasplayedthepianoB.hasgivenouttheirsongdisksC.haswrittensongsD.hasperformed(7).(2013广东)NotonlymyfriendsbutalsoI_interestedinfootballandMessiisourfavoritestar.A.beB.amC.isD.are,D,B,(8)(2013江苏淮安)Itsgettingdark.Please_thelight.A.turnonB.turnoffC.turndownD.turnaround(9)(2013湖北随州)HowdoesJackusuallygotowork?He_driveacar,butnowhe_theretoloseweight.A.usedto,isusedtowalkB.wasusedto,isusedtowalkingC.wasusedto,isusedtowalkD.usedto,isusedtowalking,A,A,(10)Hepromisedtopickmeupattheschoolgate.However,he_yet.A.didntarriveB.doesntarriveC.isntarrivingD.hasntarrived(11)BaJin,oneofthegreatestwritersinChina,_as“Peopl