九年级英语全册unit13we’retryingtosavetheearth教案2（新版）人教新目标版

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1、Unit13We’retryingtosavetheearth教材分析本单元带领学生了解了一些有关地球污染，动物濒危等问题。并且教给大家如何保护濒危动物，如何通过回收利用等方式来保护地球。本单元主要复习语法内容为情态动词和动词形式变化。本课主要带领大家进行语法复习，巩固语法知识。一、三维目标(一)知识与技能1.Tolearndifferentformsofverb.2.TounderstandtheuseofModalVerbs.(二)过程和方法3.Toknowhowtousedifferentformsofverbindifferentsitu

2、ations.4.ToknowhowtouseModalVerbsindifferentsituations.(三)情感态度和价值观5.Afterlearningthispart,everystudentwillbeabletodescribetheirawarenessoftheserioussituationofpullutionandsolutionstoenvironmentalproblemsusingwhatwehavelearnedinthislesson.教学重点1.Tochangeformsofverbaccordingtosp

3、ecificsituation.2.TouseModalVerbsproperly.教学难点1.Tochangeformsofverbaccordingtospecificsituation.2.TouseModalVerbsproperly.二、教学策略根据本课教学目标和重点内容，教师可采用读，小组讨论，口头及书面练习等活动来引导学生进行学习。三、教学准备ppt，recorder，mutiple-media四、教学环节1、课堂导入Step1Lead-in判断下列句子中使用了什么时态及情态动词。1.Wearetryingtosavetheeart

4、h.2.Theriverusedtobesoclean.3.Itwasconsideredthenicestriverinthetown.4.Theairhasbecomereallypolluted.5.Weshouldhelpsavewthesharks.Answers:1.现在进行时2.usedto3.一般过去时的被动语态4.现在完成时5.should2、课堂讲授Step2.Presentation1)Reviewdifferentformsofverbask现在时过去时将来时过去将来时一般主动语态ask/asksaskedshall/w

5、illaskshould/wouldask被动语态am/is/areaskedwas/wereaskedshall/willbeaskedshould/wouldbeasked进行主动语态am/is/areaskingwas/wereasking被动语态完成主动语态have/hasaskedhadasked被动语态have/hasbeenaskedhadbeenasked2)ReviewModalverbs.MainfunctionofModalVerbs.①.can(could)表示能力，could主要指过去时间；表示允许。②.may表允许，m

6、ight可以指过去时间，也可指现在时间，语气更委婉。③.must表示义务。意为“必须”（主观意志）④.shall表征询意见⑤.will表意愿，用于各种人称陈述句；表请求，用于疑问句。⑥.should/oughtto应该1、课堂练习Step3Exercises1)Fillinblankswiththecorrectformsofverbs.Interviewer:___________youever________(take)partinanenvironmentalproject?Ken:Yes,Ihave.I___________(help)w

7、ithaClean-UpDaylastyear.Itwas_________(consider)thebiggestclean-upprojectthiscity__________ever___________(have).Interviewer:Howmanypeople__________(take)part?Ken:I________(think)morethan1,000people________(come)tohelpout.Interviewer:That’sfantastic!Iguesseveryoneinthiscityis

8、____________(try)toimprovetheenvironment.Ken:Yes,evertoneshould_____