英语人教版九年级全册Unit13SectionA3a-3b教学设计

1、Unit13Weretryingtosavetheearth!SectionA2(3a-3b)一、教学目标：1.语言知识目标基本词汇：shark,fin,method,cruel.Harmful,chain,ecosystem,industrwyww-2-1-cnjy-com基本词组：takeaction,throwaway,putsth.togooduse基本句型：Noscientificstudieshaveshowedthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.2.技能目标:能正确运用现在进行时，现在完成时，被动语态，情

2、态动词和usedto句型。3.情感目标:有环境危机意识，学会关注环境保护环境。、教学重难点：1.教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和usedto句型。（2）保护环境的措施方法。2.教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和usedto句型。三、教学步骤:I. Revision(1)Role-play2d.(2)TranslatethesesentencesintoEnglish. 甚至是河底都满是垃圾这个小镇上的每个人都应该参加打扫骑自行车有其它的优点。我买外卖食品从来不拿木筷子和塑料叉子。II. Leadin(1)Teachertell

3、sstudentstheearthisbadlypolluted.Whatshouldwedotosavetheearth?Letstakeaction.Forexample: Turnoffthelightswhenyouleavearoom; Takebusesinsteadofdrivingcars Recyclebooksandpaper.(2)Therearesomeanimalsareendangered.Weshoulddosomethingtoprotecttheanimalsandtheenvironment!III. Discussion(1) Haveyoueversee

4、nashark?(2) Whatdoyouknowaboutsharks?IV. Reading(1)Sharksareendangered,readthepassageandjudgethesentences. Sharksfin鱼鳍)soupisfamousandexpensiveallaroundtheworld. Wehavetokillawholesharktogetabowlofsharksfinsoup. Peoplecutoffsharksfinsandthrowthesharksbackintotheocean. Sharksareinthebottomofthefoodch

5、ainintheoceansecosystem. WildAidandtheWWFareenvironmentalprotectiongroupsinChina. Sharksfinsaregoodforhealth.(2)Completethefactsheetin3a.WheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowmuchthenumbersofsomekindsofsharkshavefalleninthelast20to30yearsTwoenvironmentalgroupswhichareaga

6、inst“finning”V. Practice(3b)(1)Readthepassageanddillintheblankswiththewordsinthebox.1. Manypeopledonotrealizetheyarekillingawholesharktheyenjoyabowlofsharkfinsoup.2. Sharksareatthetopofthefoodchain,iftheirnumbersdrop,theoceansecosystemwillbeindanger.3. Manythinkthatsharksaretoostrongtobeendangered,t

7、heyarewrong.4. therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5. Sharksmaydisappearoneday_wedonotdosomethingtostopthesaleofsharkfins.（2）Retellthepassageaccordingtothewordsbelow.sharksfinsoup,insouthernChinaeachtimecutoffnoIongernotonlybutalsoatthetopdropbee

8、ndangeredthestrongestaround70millionfallenbyover90percentWildAidandtheWWFdeveloplawsscientificstudiesVI. Languagepoints1. Asharkcannolongerswimandslowlydies.鲨鱼不能再游泳然后慢慢死掉。noIonger意思是不再”e.g.ImnoIongerastud我不再是个学生了。有两个短语和noIonger同义，即notanyIonger和notanymore但他们侧重的方面不同。noIonger和notanyIongei侧重时间。e.g.HenoI

9、ongerIiveshere.=HedoesntIivehereanyIonger.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。）notanymord则重侧重程度和数量e.g.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。）2. ThismethodisnotonIycrueI,butaIsoharmfuItotheenvironment.这种方法不但残忍而且对环境有害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

10、略。e.g.1)Shenotonlyplayswell,butalsowritesmusic.她不仅很会演奏，而且还会作曲。2)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。e.g.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。e.g.Notonlyhadthepoormanbeenfined,butalsohehadbeensenttoprison.这个可怜的人不仅被罚款，而且还被送进了监狱。beharmf

11、ulto对有害e.g.Smokingisharmfultothehealth.吸烟有损健康。Playingcomputergamesmuchisharmfultostudents.电脑游戏玩太多对学生有害。3. Sharksareatthetopofthefoodchainintheoceansecosystem.鲨鱼位于海洋生物系统食物链的顶部。atthetopof在.最高地位;用最高最大的(速度,声音等)e.g.Ilookedatthetopofhishead,hishairshinyandpartedsmoothly.我看他的头顶,头发光亮,分得平滑Heshoutedatthetopof

12、hisvoiceinorderthathemightbeheard.他尽力大声叫喊,以便别人能听见。4. Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.如果它们的数目降至过低，会给所有海洋生物带来危险。此句复数形式的number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。e.g.Inthatcountry,thenumberofchildrengoingtoschoolishigherincitiesthanintownsandvillage.21世纪*教育网在那个国家，城市儿童入学人数

13、比乡镇及农村要高。常与number搭配的动词有grow,fall等。e.g.Thenumberoffamiliesthatowncarshasbeengrowingquicklyrecently.近来拥有轿车的家庭数量增长很快。5. Environmentprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.世界各地的环境保护组织，如野生救援协会和世界自然基金会，都在教育公众有关“猎翅”的行为。1）句中fin本为名词，指鱼鳍”此句中的finning由动词化的fin（割鲨鱼鳍以获取鱼翅）的-ing形式转化而成，指课文中所陈述的“猎翅”这一行为。2）WildA