unit8 we're trying to save the earth!sectiona教案2

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1、Unit8We'retryingtosavetheearth!SectionA教案2一、教学目标(一)知识与技能1.Tolearndifferentformsofverb.2.TounderstandtheuseofModalVerbs.(二)过程和方法1.Toknowhowtousedifferentformsofverbindifferentsituations.2.ToknowhowtouseModalVerbsindifferentsituations.(三)情感态度和价值观Afterlearningthispart,everystudent

2、willbeabletodescribetheirawarenessoftheserioussituationofpollutionandsolutionstoenvironmentalproblemsusingwhatwehavelearnedinthislesson.二、教学重点1.Tochangeformsofverbaccordingtospecificsituation.2.TouseModalVerbsproperly.三、教学难点习1.Tochangeformsofverbaccordingtospecificsituation.班2.

3、TouseModalVerbsproperly.四、教学准备Ppt,recorder,mutiple-media五、教学环节Step1Lead-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.Weshouldhelpsavethesharks.Answers:1.现在进行时2.usedto3.一般过去

4、时的被动语态4.现在完成时5.ShouldStep2Presentation1)Reviewdifferentformsofverbask现在时过去时将来时过去将来时一般主动语态]ask/asksaskedshall/willaskshould/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/hasbe

5、enaskedhadbeenasked2)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，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Step3ActivitiesInyourgroupmakealistofthingspeoplecandotohelpt

6、heenvironmentandpresentthem.Youcanusefollowingexamples:1)Weshouldusepublictransportation.2)wemustsavewater.Step4SummarizeLookbackonwhatwehavelearned.1）动词的各种时态语态的变形。do现在时过去时将来时过去将来时一般do/doesdidshall/willdoshould/woulddo被动语态am/is/aredonewas/weredoneshall/willbedoneshould/wouldbed

7、one进行主动语态am/is/aredoingwas/weredoing被动语态完成主动语态have/hasdonehaddone被动语态have/hasbeendonehadbeendone2）①can(could)表示能力，could主要指过去时间；表示允许。②may表允许，might可以指过去时间，也可指现在时间，语气更委婉。③must表示义务。意为“必须”（主观意志）④shall表征询意见⑤will表意愿，用于各种人称陈述句；表请求，用于疑问句。⑥should/oughtto应该