英语人教版九年级全册Unit13 SectionA 2a-2d

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1、Unit13We’retryingtosavetheearth第二课时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.Toknowhowtousedifferentformsofverb

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

3、sofverbaccordingtospecificsituation.  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Step1Le

4、ad-in判断下列句子中使用了什么时态及情态动词。1.Wearetryingtosavetheearth.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)Reviewdifferentfor

5、msofverbask现在时过去时将来时过去将来时主动语态ask/asksaskedshall/will  askshould/wouldask      一般被动语态am/is/are  askedwas/were  askedshall/willbe  askedshould/would  beasked进行主动语态am/is/are  askingwas/were  asking被动语态完成  主动语态  have/has  askedhadasked被动语态have/has  beenaskedhadbeenasked2)ReviewMod

6、alverbs.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，might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3、课堂练习Step3Exercises1)Fillinblankswiththecorrectformsofverbs.Interviewer:___________youeve

7、r________(take)partinanenvironmentalproject?Ken:    Yes,Ihave.I___________(help)withaClean-UpDaylastyear.Itwas_________(consider)thebiggestclean-upprojectthiscity__________ever___________(have).Interviewer:Howmanypeople__________(take)part?Ken:    I________(think)morethan1,000

8、people________(come)tohelpout.Interviewer:That’sfantastic!Igu