unit13We are trying to save the earth SectionA 3a-3b 第二课时.ppt

Unit13Wearetryingtosavetheearth.,SectionA3a-3b,Readthepassageaboutsharksandcompletethefactsheetbelow.,3a,Manyhaveheardofsharksfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.Butdoyourealizethatyourekillingawholesharkeachtimeyouenjoyabowlofsharksfinsoup?Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.,Thisisnotonlycruel,butalsoharmfultotheenvironment.Withoutafin,asharkcannolongerswimandslowlydies.Sharksareatthetopofthefoodchainintheoceansecosystem.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.Manybelievethatsharkscanneverbeendangeredbecausetheyarethestrongestintheirfoodchain.,Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.,Environmentalprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharksfins.Sofar,noscientificstudieshaveshownthatsharksfinsaregoodforhealth,sowhyeatthem?Helpsavethesharks!,Letsdothistoreviewthetext!,Somepeopleliketoeatsharksfinsoup,especiallyin_China.Butgettingthesharksfinisvery_.Whenpeoplecatchsharks,they_theirfinsandthrowthesharksintotheocean.Thesharkslowlydiesbecauseitcant_withoutthefin.Anditisalso_toenvironment.Sharksareatthe_ofthefoodchain.Ifthenumberofsharksdropstoolow,itwillbreakthebalanceofnuture.Pleasesaynotoeatingthesharkfinsoup,andtakeactiontosavethesharks!,southerncruelcutoffswimharmfultop,Letslearnsome,languagepoints,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。,改为同义句。Readinginthesundoesharmtooureyes.Readinginthesun_oureyes.,isharmfulto,辨析：join,joinin和takepartin,to,Willyoujoinusinthediscussion?你参加我们的讨论吗？ShejoinedtheYoungPioneers.她加入了少先队。Whydidntyoujoininthetalklastnight?昨晚你为什么没参加座谈？Didyoutakepartinthesportsmeet?你参加运动会了吗？,1.Haveyou_aclub?Yes,IminaswimmingclubandIoften_theswimmingtraining.A.joined;takepartinB.joined;joinC.takenpartin;joinD.takenpartin;joinin2.Weregoingforapicnic.Wouldyouliketo_us?Whynot?Letsgo!A.attendB.joinC.joininD.takepartin,afford是动词，意为“买得起,担负得起”，通常与can,could,beableto连用,多用于否定句中。Theycouldntafford$50foraticket.他们拿不出50美元买一张票。afford后面常跟带to的动词不定式。Wecantaffordtogoabroadthissummer.今年夏天我们没有足够的钱出国。例句：MissTaylorneverwastesmoneyonanythingtooexpensive,eventhoughshecan_to.Shehasdonatedmuchofthemoneyshesavedtocharities.A.affordB.allowC.remindD.pay,1.Manypeopledonotrealizetheyarekillingawholeshark_theyenjoyabowlofsharksfinsoup.2.Sharksareatthetopofthefoodchain,_iftheirnumbersdrop,theoceansecosystemwillbeindanger.,Readthepassageagainandfillintheblankswiththewordsinthebox.,so,when,3b,Manythinkthatsharksaretoostrongtobeendangered,_theyarewrong._therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday_wedonotdosomethingtostopthesaleofsharkfins.,but,Although,if,Languagepoints,3a,Manyhaveheardofsharksfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.,1)hear为及物动词，“听到”，表结果。e.g.Icanhearyouclearly.我能清楚听到你说的话。2)hearofhearabouthearabout和hearof“听别人说”常可互换，hearabout“听到的详细”听到的内容更详细一些，hearof（指间接的听到）听别人说起或提及e.g.Nooneinthetownhadheardofhim.e.g.Haveyouheardof/abouttheaccident?,3)hearfrom一般后接sb.指“收到来信”。e.g.HaveyouheardfromJim?你收到吉姆的来信了吗?,Butdoyourealizethatyourekillingawholesharkeachtimeyouenjoyabowlofsharksfinsoup?,Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.,Thisisnotonlycruel,butalsoharmfultotheenvironment.,AnumberofB.Thenumberof;ThenumberofC.Anumberof;thenumberofD.Anumberof;Anumberof,III.根据汉语提示完成句子。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