英语人教版九年级全册Unit13Sectiona2

1、Unit13We'retryingtosavetheearth!一、教学目标：1. 语言知识目标基本词汇：litter,advantage,bottom,fisherman,coal,ugly,cost,wooden,plastic,takeaway,bin,shark,fin,method,cruel.Harmful,chain,ecosystem,industry,law,scientific,afford,reusable,transportation,recycle,napkin,upside,gate,bottle,president,inspiration,iron,wor

2、k,metal,creativity,基本词组：beharmfulto,atthetop(ofsth.),takepartin,turnoff,takeaction,throwaway,putsth.togooduse,pull-down,bringback基本句型：We'retryingtosavetheearth!Theriverusedtobesoclean.Theairisbadlypolluted.Noscientificstudieshaveshowedthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.2. 技能

3、目标: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。3. 情感目标:有环境危机意识，学会关注环境保护环境。二、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:SectionA2(3a-3c)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

4、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. LeadinTeachertellsstudentstheearthisbadlypolluted.Whatshouldwedotosavetheearth?Let'stakeaction.Forexample: Turnoffthelightswhenyouleavearoom; Takebusesinsteadofdrivingcars Recyclebooksandpaper.(2)Therearesomeanimalsareendangered.Weshoulddosomethingtoprotecttheani

5、malsandtheenvironment!III. Discussion(1) Haveyoueverseenashark?(2) Whatdoyouknowaboutsharks?IV. Reading(1) Sharksareendangered,readthepassageandjudgethesentences. Shark's(鱼鳍)soupisfamousandexpensiveallaroundtheworld. Wehavetokillawholesharktogetabowlofshark'sfinsoup. Peoplecutoffsharks'f

6、insandthnnsharksbackintotheocean. Sharksareinthebottomofthefoodchairintheocean'secosystem. WildAidandtheWWFareenvironmentalprotectiongroupsinChina. Shark'sfinsagoodforhealth.(2) Completethefactsheetin3a.WheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowmuchthenumbersofsomeki

7、ndsofsharkshavefalleninthelast20to30yearsTwoenvironmentalgroupswhichareagainst“finning”V. Practice(3b)(1) Readthepassageanddillintheblankswiththewordsinthebox.1. Manypeopledonotrealizetheyarekillingawholesharktheyenjoyabowlofsharkfinsoup.2. Sharksareatthetopofthefoodchain,iftheirnumbersdrop,theocean

8、'secosystemwillbeindanger.3. Manythinkthatsharksaretoostrongtobeendangered,theyarewrong.4. therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5. Sharksmaydisappearonedaywedonotdosomethingtostopthesaleofsharkfins.(2) Retellthepassageaccordingtothewordsbelow.

9、shark'sfinsoup,insouthernChinaeachtimecutoffnoIongernotonlybutalsoatthetopdropbeendangeredthestrongestaround70millionfallenbyover90percentWildAidandtheWWFdeveloplawsscientificstudiesVI. Languagepoints1.AsharkcannoIongerswimandslowlydies.鲨鱼不能再游泳然后慢慢死掉。noIonger意思是不再”e.g.I'mnoIongerastud我n不再是个学

10、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。noIonger和notanyIongerM重时间。e.g.Henolongerliveshere.=Hedoesn'tlivehereanylonger.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.=Youcan'tdrinkanymore.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,but

11、aIsoharmfuItotheenvironment.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

12、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。beharmfulto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. Sharksareatthetopofthefoodchainintheocean'secosystem.鲨鱼位于海洋生物系统食物链的顶部。atthetopof在.最高地位;用

13、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。Heshoutedatthetopofhisvoiceinorderthathemightbeheard.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.

14、g.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。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