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1、Unit13We’retryingtosavetheearth!SectionA2(3a-3b)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,基本词组：beharmfulto,atthetop(ofsth.),takeparti
2、n,turnoff,takeaction,throwaway,基本句型：We’retryingtosavetheearth!Theriverusedtobesoclean.Theairisbadlypolluted.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，情态动词和usedto句型。3.情感目标:有环境危机意识，学会关注环
3、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。教学步骤I.Revision(1)Role-play2d.(2)TranslatethesesentencesintoEnglish.①甚至是河底都满是垃圾。②这个小镇上的每个人都应该参加打扫。③骑自行车有其它的优点。④我买外卖食品从来不拿木筷子和塑料叉子。II.Leadin(1)T
4、eachertellsstudentstheearthisbadlypolluted.Whatshouldwedotosavetheearth?Let’stakeaction.Forexample:①Turnoffthelightswhenyouleavearoom;②Takebusesinsteadofdrivingcars③Recyclebooksandpaper.(2)Therearesomeanimalsareendangered.Weshoulddosomethingtoprotecttheani
5、malsandtheenvironment!III.Discussion(1)Haveyoueverseenashark?(2)Whatdoyouknowaboutsharks?IV.Reading(1)Sharksareendangered,readthepassageandjudgethesentences.①Shark’sfin（鱼鳍）soupisfamousandexpensiveallaroundtheworld.②Wehavetokillawholesharktogetabowlofshark’
6、sfinsoup.③Peoplecutoffsharks’finsandthrowthesharksbackintotheocean.④Sharksareinthebottomofthefoodchainintheocean’secosystem.⑤WildAidandtheWWFareenvironmentalprotectiongroupsinChina.⑥Shark’sfinsaregoodforhealth.(2)Completethefactsheetin3a.Wheresharkfinsoupi
7、spopular NumberofsharkscaughtandtradedeveryyearHowmuchthenumbersofsomekindsofsharkshavefalleninthelast20to30yearsTwoenvironmentalgroupswhichareagainst“finning”V.Practice(3b)(1)Readthepassageanddillintheblankswiththewordsinthebox.1.Manypeopledonotrealizethe
8、yarekillingawholeshark______theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,____iftheirnumbersdrop,theocean’secosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_____theyare
