unit 13 we re trying to save the earth(第13课时)教案+学案

unit 13 we re trying to save the earth(第13课时)教案+学案 U Unn it13Were trying to save the earth 一、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。 本单元分为section Aand sectionB两个部分。 本课为第一课时带领大家了解地球污染问题，以及探讨如何保护地球，减少污染。 二、三维目标 (一)知识与技能1.To learnthe following words and expressions.bottom,coal,public,ugly,cost,advantage,method,cruel,harmful,afford.2.To understandthe pasageon Page99. (二)过程和方法3.To geta generalknowledge of pollution byreading androle-play.4.To knowabout how to reduce pollution throughdiscussion. (三)情感态度和价值观5.After learningthis part,every studentwill beaware ofthe serioussituation ofpullution anddetermined totake actionto protectour earthfron nowon. 三、教学重点1.How touse the following words and expressions:cost,advantage,harmful,afford,used to,play a part in?2.to understandthe passageon Page99. 四、教学难点1.How touse the followingwords andexpressions:cost,advantage,harmful,afford,used to,play a part in?2.to understandthe passageon Page99. 五、教学策略根据本课教学目标和重点内容，教师可采用听，读，小组讨论，角色扮演等活动来引导学生进行学习。 六、教学准备ppt，recorder，mutiple-media 七、教学环节 1、课堂导入Step1Lead-in1)Show somepictures aboutpollution andask studentsto discusswhats thedanger ofeach kindof pollution.2)Here aresome wordsare relatedto differentkinds ofpollution.Write themin thebox below,and you can addmore words.loud music,littering,building houses,cars,ships,mobile phones,rubbish,factories,planes,smoking.Air pollutionNoise pollutionWater3)Role-play the following conversationand makeyour ownconversations aboutthe kindsofpollutionabove.A:The riverwas dirty.Even thebottom ofthe riveris fullof rubbish.B:But it used to be soclean.A:Yes,but peopleare litteringin theriver.B:Everyone in the townshould play a part in cleaningit up. 2、课堂讲授Step2.Reading1)Fast-reading Nowturn topage99and read the pagequickly tofind answersto thesheet.Questions AnswersWhere sharks finsoup ispopular SouthernChina Numbersof sharkscaught andtraded everyyear70million Howmuch thenumbers ofsome kindsof sharkshave fallenin thelast20-30years.over90percent Twoenvironment groupswhich areagainst finningWildAid andthe WWF2)careful-reading Readthe passageagain andfill inblanks.so,although,if but,whenMany peopledo notrealize they are killinga wholeshark_they enjoya bowlof sharks finsoup.Sharks areat thetop ofthe foodchain,_if theirnumbers drop,the oceans ecosystemwill bein danger.Many think that sharksare toostrong to be endangered,_theyarewrong._there areno scienfiticstudies tosupport this,a lotof peoplebelieve thatsharks finsare goodfor health.Sharks maydisappear oneday_we donot dosomething tostop thesale ofsharks fins.Possible answers:when,so,but,although,if3)Studying usefulwords andexpressions.cost v价钱为，花费n.价钱，代价；花费，费用The cost of aloaf ofbread hasincreased five-fold.一条面包的价钱增长了4倍。 Badges arealso availableat acost of?2.50.徽章也有卖的，2.5英镑一枚。 Its goingto cost me over$100,000to buynew trucks.买几辆新卡车将花掉我10万多美元。 harmful adj.对?有害的；能造成损害的；不利；不良Smoking isharmful toour health.吸烟对人类的健康有害。 used to do过去一向，过去时常，过去曾（而现在不再）做Who used to doyour laundry?谁过去一直为你洗衣服？She used to washdishes ina restaurant.她曾经在餐馆里洗过盘子。 afford vt.买得起；担负得起；提供；给予We couldnt afford to buya newcar.我们买不起新的车。 We cant afford to wait.我们等不起。 My parentscant evenafford a new refrigerator.我父母甚至买不起一台新冰箱。 play a part in扮演某角色;与?有关，对?有影响Id liketo play a part in theirdiscussion.我愿意参与他们的讨论。 Education isplaying abig part in environmentalprotection.教育在环境保护中起着很大作用。 He playeda part in hisfavorite TVshow.他在他最喜欢的电视节目中扮演了一个角色。 3、课堂练习Step3Exercises Translate the followingphrases:1.对?有害2.买得起?.3.在?中起作用4.过去常常5.解决问题6.起作用7.听说8.在?顶部9.在?底部10.切下，割下 4、课堂活动Step4ActivitiesIn yourgroup make a listof thingspeople cando to help the environment. 5、课堂小结Step5.Summarize Lookback onwhat we have learned.1.How to protect environment.2.Useful languages:be harmful to,at thetop of,at thebottom of.Solve problems? 6、作业布置Homework:make aconversation withyour parnterabout whatyoucando to reducepollution. 八、板书设计 九、教学反思通过本课学习，学生们了解了污染以及污染带来的危害，以及保护动物的必要性。 学完本课后，同学们要积极行动起来，为保护环境，保护动物作贡献。 U Unn it13Were trying to save the earth【学习目标】 (一)知识与技能1.To learnthe followingwords andexpressions.bottom,coal,public,ugly,cost,advantage,method,cruel,harmful,afford.2.To understandthe pasageon Page99. (二)过程和方法3.To geta generalknowledge ofpollution byreading androle-play.4.To knowabout how to reducepollution throughdiscussion. (三)情感态度和价值观5.After learningthis part,every studentwill beaware ofthe serioussituation ofpullution anddetermined totake actionto protectour earthfron nowon.【自主梳理】1.Turn toPage97and finish1a.2.Turn topage99,readthe passage and finish exerciseson Page99.3.Check answers.【重点领悟】Studying usefulwords andexpressions.cost v价钱为，花费n.价钱，代价；花费，费用Unit13Were tryingto save the earth1.cost:V sth.cost money2.harmful:be harmfulto3.used to:used todo4.afford:afford sth./afford todo5.play a part inThe cost of aloaf ofbread hasincreased five-fold.一条面包的价钱增长了4倍。 Badges arealso availableat acostof?2.50.徽章也有卖的，2.5英镑一枚。 Its goingto costme over$100,000to buynew trucks.买几辆新卡车将花掉我10万多美元。 harmful adj.对?有害的；能造成损害的；不利；不良Smoking isharmfultoour health.吸烟对人类的健康有害。 used todo过去一向，过去时常，过去曾（而现在不再）做Who used todoyour laundry?谁过去一直为你洗衣服？She used to washdishes ina restaurant.她曾经在餐馆里洗过盘子。 afford vt.买得起；担负得起；提供；给予We couldnt affordto buya newcar.我们买不起新的车。 We cant affordto wait.我们等不起。 My parentscant evenafford anew refrigerator.我父母甚至买不起一台新冰箱。 playapartin扮演某角色;与?有关，对?有影响Id liketo playapartin theirdiscussion.我愿意参与他们的讨论。 Education isplaying abig partin environmentalprotection.教育在环境保护中起着很大作用。 He playedapartin hisfavorite TVshow.他在他最喜欢的电视节目中扮演了一个角色。 【探究提升】cost表花费时，主语为_.这块表花了我一千元。 _.以?价格_harmful是_词。 对?有害_used to表示过去常常，后接_.afford买得起?_;_承受得起做某事_在电影中扮演一个角色_起着重要作用_Answers:【探究提升】物，The watchcostme1000yuan.at acostof形容，be harmfulto动词原形afford sth,affordtobuy,affordtodoplayapartina film,play animportant partU Unn it13Were tryingto save the earth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。 十、三维目标 (一)知识与技能1.To learndifferent forms of verb.2.To understandthe useof Modal Verbs. (二)过程和方法3.To knowhow touse different forms of verb indifferent situations.4.To knowhow touse Modal Verbs indifferent situations. (三)情感态度和价值观5.After learningthis part,every studentwill beable todescribe theirawareness ofthe serioussituation ofpullution andsolutions toenvironmental problemsusing what we have learned inthis lesson.教学重点1.To changeforms ofverb aordingto specificsituation.2.To use ModalVerbsproperly.教学难点1.To changeforms ofverb aordingto specificsituation.2.To useModalVerbsproperly. 十一、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。 十二、教学准备ppt，recorder，mutiple-media 十三、教学环节 7、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.We are tryingto savethe earth.2.The riverusedto be soclean.3.It wasconsidered thenicest riverin thetown.4.The airhas beereally polluted.5.We shouldhelp savewthe sharks.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.should 8、课堂讲授Step2.Presentation1)Review differentforms ofverb ask现在时过去时将来时过去将来时一般主动语态ask/asks askedshall/will askshould/would ask被动语态am/is/are askedwas/were askedshall/will beasked should/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 asked had asked被动语态have/has been asked hadbeen asked2)Review Modal verbs.Main functionof ModalVerbs.can(could)表示能力，could主要指过去时间；表示允许。 .may表允许，might可以指过去时间，也可指现在时间，语气更委婉。 .must表示义务。 意为“必须”（主观意志）.shall表征询意见.will表意愿，用于各种人称陈述句；表请求，用于疑问句。 .should/ought to应该 9、课堂练习Step3Exercises1)Fill inblanks withthe correctforms ofverbs.Interviewer:_you ever_(take)partinan environmentalproject?Ken:Yes,I have.I_(help)with aClean-Up Daylast year.It was_(consider)the biggestclean-up projectthis city_ever_(have).Interviewer:How manypeople_(take)part?Ken:I_(think)more than1,000people_(e)to helpout.Interviewer:Thats fantastic!I guesseveryone inthis cityis_(try)to improve the environment.Ken:Yes,evertone should_(play)apartin keepingthe cityclean.Possible answers:Have taken,helped,considered,had had,took,think,came,trying.,play2)Fill inblanks withproper modalverbs.Can wouldcould have to shouldmight/may mustWhen ites tosaving the earth,people_think thatbig things_be done.However,many forgetthat saving the earthbegins withsmall things.For example,You_save electricityby turningoff the lights when you leave a room.You_also usepaper orreusable bags instead ofplastic bags.In somestores,you now_pay forplastic bags.I thinkthis isa greatidea.And instead of drivingto schoolor work,you_ride yourbike orwalk.If its far,you_take thebus.All thesesmall things_add up and becamebig thingsthat_improvethe environment.We cant affordto waitany longerbefore takingaction.Possible answers:may,cant,can,could,have to,may/might,should,would,must 10、课堂活动Step4ActivitiesIn yourgroup makea listof thingspeople cando to help theenvironment andpresent them.You canuse followingexamples:1)We shoulduse publictransportation.2)we mustsave water.3)? 11、课堂小结Step5.Summarize Lookback onwhat wehave learned.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/does didshall/will doshould/would do被动语态am/is/are donewas/were doneshall/will be done should/would bedone进行主动语态am/is/are doingwas/were doing被动语态完成主动语态have/has done had done被动语态have/has been donehadbeendone2）.can(could)表示能力，could主要指过去时间；表示允许。 .may表允许，might可以指过去时间，也可指现在时间，语气更委婉。 .must表示义务。 意为“必须”（主观意志）.shall表征询意见.will表意愿，用于各种人称陈述句；表请求，用于疑问句。 .should/ought to应该 12、作业布置Homework:Review this lesson andpreview SectionB. 十四、板书设计 十五、教学反思通过本课学习，学生们进一步了解了动词各种形势变化，及情态动词用法。 U Unn it13Were tryingto savethe earth【学习目标】 (一)知识与技能1.To learndifferentforms ofverb.2.To understandthe useof ModalVerbs. (二)过程和方法3.To knowhowtouse differentformsofverb indifferent situations.4.To knowhowtouseModalVerbs indifferent situations. (三)情感态度和价值观5.After learningthis part,every studentwill beable todescribe theirawareness ofthe serioussituation ofpullution andsolutions toenvironmental problemsusing whatwehavelearned inthislesson.【自主梳理】1.判断下列句子中使用了什么时态及情态动词。 1.We are tryingto savethe earth.2.The riverusedto be soclean.3.It wasconsidered thenicest riverin thetown.4.The airhas beereally polluted.5.We shouldhelp savewthe sharks.Unit13Were tryingto savethe earth1.被动语态的构成2.情态动词.can(could).may.must.shall.will.should/ought to2.presentation1)verb forms现在时过去时将来时过去将来时一般主动语态ask/asks askedshall/will askshould/would ask被动语态am/is/are askedwas/were askedshall/will beasked should/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 askedhad asked被动语态have/has beenaskedhadbeenasked2)Modalverbs.Main functionof ModalVerbs.can(could)表示能力，could主要指过去时间；表示允许。 .may表允许，might可以指过去时间，也可指现在时间，语气更委婉。 .must表示义务。 意为“必须”（主观意志）.shall表征询意见.will表意愿，用于各种人称陈述句；表请求，用于疑问句。 .should/ought to应该【重点领悟】1)Fill inblanks withthe correctformsofverbs.Interviewer:_you ever_(take)partinan environmentalproject?Ken:Yes,I have.I_(help)with aClean-Up Daylast year.It was_(consider)the biggestclean-up projectthis city_ever_(have).Interviewer:How manypeople_(take)part?Ken:I_(think)more than1,000people_(e)to helpout.Interviewer:Thats fantastic!I guesseveryone inthis cityis_(try)to improvetheenvironment.Ken:Yes,evertone should_(play)apartin keepingthe cityclean.Possible answers:Have taken,helped,considered,had had,took,think,came,trying.,play2)Fill inblanks withproper modalverbs.Can wouldcould haveto shouldmight/may mustWhen ites tosavingthe earth,people_thinkthatbig things_bedone.However,many forgetthat savingtheearthbegins withsmall things.For example,You_save electricityby turningoff thelights when you leavea room.You_also usepaper orreusable bagsinsteadofplastic bags.In somestores,you now_pay forplastic bags.I thinkthis isa greatidea.And insteadof drivingto schoolor work,you_ride yourbike orwalk.If its far,you_take thebus.All thesesmall things_add up and【探究提升】一Fill inblanks usingproper formsof givenwords. 1、Ill givethe bookto himas soonas he_back(e). 2、_the baby_crying yet?(stop) 3、I dont knowwhether mother_me to beijing nextmonth.(take) 4、she_on hercoat andwent out.(put) 5、“What arethey doing?”“They_ready forthe sports meeting.”(get) 6、The boyasked hismother_him goand playbasketball.(let) 7、Im sorryto keepyou_for along time.(wait) 8、It_(take)him halfan hour_(finish)his homeworkyesterday. 9、If it_an interestingfilm,well seeit tomorrow.(be) 10、They usually_(do)their homeworkafter supper. 11、Listen!who_(sing)inthenext roomnow? 12、_(be)your parentsin shanghailast year? 13、Mr.yu_(teach)us mathssince1982. 14、They willhave atrip(旅行)to thegreat wallif it_(not rain)tomorrow. 15、Li Mingoften_(listen)to theradio inthe morning.二Choose thebest answers.1-May Istop mycar here?-No,you_.A.cant B.mustnt C.neednt D.dont haveto2.-Must weclean thehouse now?-No,you_.A.neednt B.may not C.mustnt D.cant3.Man_die withoutwater.A.will B.can C.need D.shall4.You_return thebook now.You cankeep itnext weekif youlike.A.cant B.mustntC.neednt D.may not5.-Johnny,you_play withthe knife,you_hurt yourself.A.wont.cant B.mustnt.may C.shouldnt,must D.cant.shouldnt Answers:【自主梳理】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.should【重点领悟】1)Have taken,helped,considered,had had,took,think,came,trying.,play2)may,cant,can,could,haveto,may/might,should,would,must【探究提升】 1、es 2、has,stopped 3、will take 4、put 5、are getting 6、to let 7、waiting 8、took,to finish 9、is 10、do 11、is singing 12、were 13、has taught 14、doesnt rain 15、listens AAACBU Unn it13Were tryingto savetheearth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。 本单元分为section Aand sectionB两个部分。 本课为第三课时带领大家了解我们能为地球做些什么。 三维目标 (一)知识与技能1.To learnthe followingwords andexpressions.gate,bottle,president,metal等。 2.To understandthe pasageon Page102. (二)过程和方法3.To geta generalknowledge ofpollution byreading androle-play.4.To knowabout howto reducepollution throughdiscussion. (三)情感态度和价值观5.After learningthis part,every studentwill beaware ofthe serioussituation ofpullution anddetermined totake actionto protectour earthfron nowon. 十六、教学重点1.To knowthe followingwords:gate,bottle,president,metal,put togood use,set up,known for,pull down,not only?but also等2.to understandthe passageon Page102. 十七、教学难点1.To knowthefollowingwords:gate,bottle,president,metal,put togood use,set up,known for,pull down,not only?but alao等2.to understandthe passageon Page102. 十八、教学策略根据本课教学目标和重点内容，教师可采用听，读，小组讨论，角色扮演等活动来引导学生进行学习。 十九、教学准备ppt，recorder，mutiple-media 二十、教学环节 13、课堂导入Step1Lead-in Discussion:what canwe dotohelpsavethepla?Rank theseitems fromthe easist (1)to themost difficult (5)._stop ridingin cars._recycle booksand papers._Turn offthelightswhenyouleavearoom._Turn offthe showerwhenyouwashing yourhair._Dontusepaper napkins.Possible answers: 5312414、课堂讲授Step2.Reading1)Fast-reading Nowturn topage102and readthe pagequickly tofind answersto thechart.Name Whatmaterials didthey use?What didthey make?Answers:Name Whatmaterials didthey use?What didthey make?Amy HayesOld,boat,rocks,old galssbottles,materials from old housesA houseJessica WongOld clothes bags Wang Tao Ironand othermaterials fronold carsArt pieces2)careful-reading Raedthepassageagain andfill inblanks.put togood use,set up,known for,pull down,not only?but alao,build?out ofAmy Hayeslives inthe Uk.Many ofthe oldbuildings inher neighborhoodwere_.All therubbish andold thingsin Amys neighborhoodwere then_when Amybuilt her house.Amy isvery creativeand she_her frontgate_rocks andold glassbottles.She putan oldboat ontop ofherhouse.Jessica Wongsells her bagsina smallshop,but shealso_on linebusiness tosell them.Though Jessicasbagsare madefromoldclothes,herbagsare_being cuteand useful.WangTao_makes largepieces ofmetal artthat looklike humansor animals,_make smallerpieces forthe home.Possible answers:pulled down,put togood use,built outof,set up,known for,not only?but also3)Studying usefulwords andexpressions.put?into use:应用；利用；投入使用The firstdigital puterwas put into usein1944.一九四四年,第一台二位制计算机投入了使用.The newlybuilt waitingbuilding was put into use today.这座新建的候机楼今起启用.set up竖立；升起;建立；设立；创立;创造（纪录等）They set up somestones asland marks他们竖起一些石头当界碑。 The schoolhas set upa special class tohelp poor readersThe Frenchteam set upanew recordat tonights meetingknown for:以?而着名,出名,以见长Mrs.brown is known forher hospitality.布朗夫人以其好客闻名。 London usedtobea cityknown foritsblack fogs.伦敦的“黑雾”一向闻名。 Be knownas:以作为?而著称Now hewas knownas a steady man.现在他已被大家认为是一个可靠的人。 not only?but also:not only?but also?用于连接两个表示并列关系的成分，其中的also有时可以省略。 She not only playswell,but alsowrites music.她不仅很会演奏，而且还会作曲。 He worksnot onlyon weekdaysbut onSundays.We werenot onlyhungry,but alsotired.我们不但饿了，而且也累了。 当not only?but also连接两个主语时，谓语动词的数原则上与其相近的主语保持一致。 Not only