资源描述：
《人教英语九年级第十三单元第二课时.pptx》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、Unit13 We’retryingtosavetheearth!SectionA3a—4cUnit13 We’retryingtosavetheearth!SectionA3a—4cBY残荷居士Haveyoueverseenashark?Whathashappenedtosharks?Thegeneralideaofthearticleisabout.A.waterpollutionB.environmentalprotectiongroupsC.thesharkReadforthegeneralidea
2、of3a.CWheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowmuchthenumbersofsomekindsofsharkshavefalleninthelast20to30yearsTwoenvironmentalgroupsagainst“finning”southernChina70millionover90percentWildAidandtheWWFReadthepassageaboutsharksandcom
3、pletethefactsheetbelow.Readthepassageagainandfillintheblankswiththewordsinthebox.soalthoughifbutwhen1.Manypeopledonotrealizetheyarekillingawholeshark______theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,____iftheirnumbersdrop,theocean’secosy
4、stemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_____theyarewrong.4._________therearenoscientificstudiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday___wedonotdosomethingtostopthesaleofsharkfin
5、s.whensobutAlthoughif☆教材解读☆1.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.if引导的是条件状语从句,谓语动词使用一般现在时表示将来,主句使用一般将来时。Ifitdoesn’traintomorrow,wewillgofishing.如果明天不下雨,我们就去钓鱼。2.Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatth
6、em?◆sofar的意思是“到目前为止”,主句时态使用现在完成时。Sofar,wehavelearnedEnglishforsixyears.到目前为止,我们已经学习英语六年了。◆句中that引导的是宾语从句,作动词shown的宾语。begoodfor的意思是“对……有好处”。Studyshowsthatdoingexerciseeverydayisgoodforourhealth.研究显示,每天锻炼对我们的健康有好处。Retellthestoryaccordingtothefollowingmindmap
7、.We’retryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharkfinsaregoodforhealth.PresentperfectWeshouldhelpsavethesharks.ModalverbsGrammarFocusFillintheblankswiththecorre
8、ctformsoftheverbs.Joe:_____youever______(take)partinanenvironmentalproject?Eric:Yes,Ihave.I______(help)withaClean-UpDaylastyear.Itwas__________(consider)thebiggestclean-upprojectthiscity____ever____(have).Joe
