unit 13 we are trying to save the earth教案+全单元学案

unit 13 we are trying to save the earth教案+全单元学案 Unit13Were tryingto save the earth! 一、教学目标1.语言知识目标基本词汇litter,advantage,bottom,fisherman,coal,ugly,cost,wooden,plastic,takeaway,bin,shark,fin,method,cruel.Harmful,chain,ecosystem,industry,law,scientific,afford,reusable,transportation,recycle,napkin,upside,gate,bottle,president,inspiration,iron,work,metal,creativity,基本词组组be harmful to,at thetop(of sth.),take part in,turn off,take action,throw away,put sth.to good use,pulldown,bring back基本句型Were tryingto save the earth!The riverused to be so clean.The airis badly polluted.No scientificstudies haveshowed thatshark fins are good for health.We shouldhelp save the sharks.2.技能目标:能正确运用现在进行时，现在完成时，被动语态，情态动词和used to句型。 3.情感目标:有环境危机意识，学会关注环境保护环境。 二、教学重难点1.教学重点 （1）能正确运用现在进行时，现在完成时，被动语态，情态动词和used to句型。 （2）保护环境的措施方法。 2.教学难点能正确运用现在进行时，现在完成时，被动语态，情态动词和used to句型。 三、教学步骤:Section A1(1a-2d)I.Presentation Showthe pictureof the earth andtell students the earth is pollutednow.For example: (1)The factoriesthat burn coal pollutethe airwith a lot ofblack smoke. (2)Factories put waste into the river. (3)People shouldthrow awaylitter in the bin. (4)There aremore cars on theroad.II.Learning Here are some words related to different kinds of pollution.Write themin the box below.Then addmore words.loud musiars rubbishplanes litteringships factoriessmoking building houses mobilephones noise pollution air pollution water pollution_Keys:noise pollutionloud musicplanes mobilephones buildinghouses airpollution factoriessmoking carsbuildinghouseswater pollutionships rubbishlittering factoriesIII.Listening1.1b Listen and plete the sentences.What wasthe problem?The river was_.Even thebottom(底部)of the river was full of_.There wereno more_for fishermen(渔民)to catch.What causedthe problem?People are throwing_into the river.Factories areputting_into the river.How shouldthe problembe solved?We shouldwrite to the_and ask them to_the factories.Everyone shouldhelp to_the river.Keys:really dirtyrubbish fishlitter wastegovernment close down clean up2.Listen again and check()the sentencesyou hear.1)We couldgo fishingin the river.2)The riverwas really dirty.3)The riverhas alwaysbeen thenicest riverin this town.4)We shouldasktheteachers forhelp.Keys:23IV.Practice1.Role-play theconversation in1c.Mark:The riverwas dirty.Even thebottom of the riverwas fullof rubbish.Tony:But it used to be soclean!Mark:Yes,but people are throwing litter into the river.Tony:Everyone in this townshould play a part in cleaningit up!2.Make conversationsusing thepollution in1a.A:The riverhas alwaysbeen thenicest riverinthis town.B:Yes,it used to be soclean.A:But Iwas therelast weekend and the riverwasreallydirty.B:What causedthe problem?A:People arethrowinglitter into theriver.B:What shouldwe do?A:Factories arealso puttingwaste into theriver.B:Yes,everyone inthistownshould play a part.A:We shouldwrite to the governmentand askthem toclose down the factories.B:What elsecan we do?A:Everyone shouldhelp to cleanup theriver.V.Language points1.Were tryingto savethe earth!我们正在竭尽全力拯救地球!try to do=try ones bestto do努力去做某事。 e.g.Every studentshould tryto studyhard in order tostudy in a university.为了进入大学学习，每个学生都应该努力学习。 2.Herearesomewordsrelatedtodifferentkinds ofpollution.be relatedto与有关e.g.I am not relatedto himin anyway.我和他无任何关系。 3.Everyone inthistownshould play a part in cleaningit up!playapart in在方面起作用e.g.A gooddiet plays a largepartinhelping peoplelive longer.健康的饮食在帮助人们长寿方面起着非常大的作用。 playapart在中扮演角色e.g.He wasinvited toplayapartinthis TVplay.他被邀请参加这个电视剧的演出。 4.Even thebottom of theriverwasfullof rubbish.Yes,but peoplearethrowinglitterinto theriver.litter和rubbish都可指垃圾，用作不可数名词。 rubbish指没用的东西(被扔或将要丢弃的无用的东西)不可回收。 litter指(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)还可回收e.g.Throw therubbish out.把垃圾扔出去。 The roomis fullof rubbish.房间里堆满了垃圾。 Pick upyour litterafter apiic.野餐后将废弃物收拾好。 VI.Listening1.2a Listentotheinterview.Circle thekinds ofpollution thatJason and Susan talk about.A.land pollutionB.airpollutionC.noisepollutionD.waterpollutionKeys:B A2.2b Listen again andplete the sentences.1)The airis badlypolluted becausethere are_on theroad thesedays.2)Factories thatburncoalalso_the airwith a lot ofblack smoke.3)There isalso toomuch rubbish and waste.People_things every day.4)People arealso litteringin_like parks.This isturning beautifulplaces intougly(丑陋)ones.Keys:more carspollute arethrowing awaypublic places3.Listen and answer the questions.1)Who isthe interviewertalking to?2)What arethey talking?3)What otherproblems dothey see?Keys:Susan andJason.The environmental problems.Theres toomuch rubbishand waste in the streets.VII.Practice(2c)Use the information in2a and2b torole-play conversationsbetween Jason andSusan.Jason:The airhas beereally pollutedaround here.Im gettingvery worried.Susan:Yes,I used to beable tosee starsin thesky.Jason:The problemis thatVIII.Discussion Askstudents whatwe shoulddo to savethe earth.Help studentsanswer,turn off the lights when you leave a room;stop ridingin cars;stop usingpaper towelsor napkins;recycle booksand paper.IX.Reading1.Read2dandplete the chart.Problems Solvingproblems airpollution waste pollution wooden(木头的)chopsticks orplastic forksrubbish2.Role-play theconversation.Interviewer:JasonandSusan,what areyour ideasfor solvingthese problems?Jason:Well,to cutdown airpollution,we shouldtake thebus orsubway instead of driving.Susan:Yeah,or ride a bike.There areother advantages(优点)of bikeriding.Its goodfor healthand itdoesnt cost(花费)anything!Interviewer:Great ideas!What aboutwastepollution?Susan:Mmm,I thinksimple thingslike bringinga bagto go shopping canhelp.I starteddoing thata yearago.Jason:Me,too.Also,I nevertake wooden chopsticks orplastic(塑料)forks whenI buytakeaway(外卖食品)food.I usethe onesat home.Susan:And rememberto throwrubbish in the binsand keeppublic placesclean andbeautiful foreveryone.Interviewer:So together,our actionscan make a differenceand leadto abetter future!X.Summary andlanguage points1.This isturning beautifulplaces intougly ones.turninto把变成e.g.The icyrain seemedlike toturn intosnow.渐渐地冻雨又变成雪花的模样。 2.Its goodfor healthand itdoesnt costanything!cost v.花费；使付出指花费金钱，主语通常是物。 cost的过去式和过去分词均为cost。 e.g.The newshirt costMr Wang200yuan.王先生花了200元买了新衬衫。 How muchdoes the new putercost?新电脑花了多少钱？take,spend,pay&cost take，spend，pay和cost都可以表示花费，但它们的用法各有不同。 1)take多表示花费时间，常用于It takessb.some timetodo sth.这一句型中，其中it作形式主语。 e.g.It usuallytakes me40minutes tocook thedinner.2)spend多表示花费时间和金钱，主语通常是人，常用于sb.spend(s)some time/money onsth.和sb.spend(s)some time/money(in)doing sth.两种句型。 e.g.David spent2,000yuan on the newmachine.My fatherspends anhour(in)watching thenews onTV every day.3)pay多表示花费金钱，主语通常是人，常用于sb.pay(s)some moneyfor sth.句型。 e.g.Tommy paid20yuan forhis breakfastyesterday.4)cost多表示花费金钱，主语通常是物，常用于sth.cost(s)(sb.)some money.句型。 e.g.The newdress costLinda88yuan.根据句意用take,spend,pay或cost的适当形式填空。 1)That newcar_them lotsof money.2)Mona_50yuan onthe booksjust now.3)It usually_me anhour todo my homework.4)You should_some timepractising yourpronunciation.5)My brother_6,000yuan forthenewputer yesterday.Keys costspent takesspend paid3.So together,our actionscan makea differenceand leadto abetter future!makeadifference(to)表示(对)产生影响或作用e.g.Do youthink hiswords wouldmake anydifference tothe finaldecision?你认为他的话会对最后的决定产生影响吗？The newteacher alwaysencourages littleTom.This hasmade abig differenceto him.新来的老师总是鼓励小汤姆，这对他影响很大。 XI.Exercises用动词的适当形式填空。 1)Were trying_(save)the earth.2)There used to_(be)clean andbeautiful.3)There are too many_for_to catch(fish).4)Its badfor environmentto use_(wood)chopsticks.Keys:to savebe fishfishermen woodenXII.Think aboutThe earthis badlypolluted.Please makea posterand thinkof whatwe can do.XIII.Homework1.Copy thenew wordsand rememberthem.2.Read thelistening materialsof1b,2a.Section A2(3a-3c)I.Revision (1)Role-play2d. (2)Translate thesesentences intoEnglish.甚至是河底都满是垃圾。 这个小镇上的每个人都应该参加打扫。 骑自行车有其它的优点。 我买外卖食品从来不拿木筷子和塑料叉子。 II.Lead in (1)Teacher tellsstudentsthe earthis badlypolluted.What shouldwe do to savethe earth?Lets takeaction.For example:Turn off the lights when you leave a room;Take busesinstead of driving carsRecycle booksand paper. (2)There aresome animalsare endangered.We shoulddo something to protect the animalsand the environment!III.Discussion (1)Have you ever seena shark? (2)What doyou knowabout sharks?IV.Reading (1)Sharks areendangered,read the passage andjudge thesentences.Sharks fin（鱼鳍）soup isfamous andexpensive allaround the world.We have to killa wholeshark to get a bowl of sharks fin soup.People cutoff sharksfins andthrow the sharks backintothe ocean.Sharks areinthebottom of the foodchain inthe oceans ecosystem.WildAid and the WWFare environmentalprotection groupsin China.Sharks finsare goodfor health. (2)Complete thefact sheetin3a.Where sharkfin soupis popularNumber ofsharks caughtand tradedevery yearHow muchthe numbersof somekindsofsharks havefallen inthe last20to30years Twoenvironmental groupswhich areagainstfinningV.Practice(3b) (1)Read the passage anddill inthe blankswith the words inthe box.1.Many peopledo notrealize they are killinga wholeshark_they enjoyabowlofsharkfinsoup.2.Sharks areat thetop of the foodchain,_if theirnumbers drop,the oceans ecosystemwill bein danger.3.Many think that sharksaretoostrong tobe endangered,_theyarewrong.4._there areno scientificstudies tosupport this,alotof peoplebelieve thatshark finsare goodfor health.5.Sharks maydisappear oneday_we donot dosomethingtostop thesale ofshark fins. (2)Retell thepassage aordingtothewords below.sharks finsoup,in southernChina eachtime cutoff no longer not onlybut alsoat thetop dropbe endangeredthe strongestaround70million fallenby over90percent WildAid and the WWF developlaws scientificstudies VI.Language points1.A sharkcan no longer swimand slowlydies.鲨鱼不能再游泳然后慢慢死掉。 no longer意思是不再e.g.Imnolonger astudent.我不再是个学生了。 有两个短语和nolonger同义，即notany longer和notany more，但他们侧重的方面不同。 nolonger和notany longer侧重时间。 e.g.He nolonger liveshere.=He doesnt livehere any longer.他不在这儿居住了。 (一个时间以前他住在这儿，过了这个时间，他就离开了。 )notany more侧重侧重程度和数量e.g.You candrink nomore.=You cant drinkany more.你不能再喝了。 (喝酒的量到了一定程度，不能再继续下去了。 )2.This methodis not only cruel,but alsoharmful tothe environment.这种方法不但残忍而且对环境有害。 not onlybut also用于连接两个表示并列关系的成分，着重强调后者，其意为不仅而且;其中的also有时可以省略。 e.g.1)She not only playswell,but alsowrites music.她不仅很会演奏，而且还会作曲。 2)Not onlymen but also womenwere chosen.不仅仅是男的，女的也有被选中的。 若连接两个成分作主语，其谓语通常与靠近的主语保持一致。 e.g.Not onlyyou but also hehas toleave.不只是你，他也得离开。 not only放在句首，后接句子时要用倒装结构。 e.g.Not onlyhad thepoor manbeen fined,but alsohe hadbeen sentto prison.这个可怜的人不仅被罚款，而且还被送进了监狱。 be harmfulto对有害e.g.Smoking is harmfultothe health.吸烟有损健康。 Playing putergames muchisharmfulto students.电脑游戏玩太多对学生有害。 3.Sharks areat thetop ofthe foodchain intheoceans ecosystem.鲨鱼位于海洋生物系统食物链的顶部。 at thetop of在.最高地位;用最高最大的(速度,声音等)e.g.I lookedat thetop ofhis head,his hairshiny andparted smoothly.我看他的头顶,头发光亮,分得平滑。 He shoutedat thetop ofhis voiceinorderthat hemight beheard.他尽力大声叫喊,以便别人能听见。 4.If theirnumbers droptoo low,it willbring dangerto allocean life.如果它们的数目降至过低，会给所有海洋生物带来危险。 此句复数形式的number表达全海洋中鲨鱼的总量。 当表示数值的高或低时，number要用high或low修饰。 e.g.In thatcountry,the numberof childrengoing to school ishigher incities thanin townsand village.在那个国家，城市儿童入学人数比乡镇及农村要高。 常与number搭配的动词有grow,fall等。 e.g.The numberof familiesthat owncars hasbeen growingquickly recently.近来拥有轿车的家庭数量增长很快。 5.Environment protectiongroups aroundthe world,such asWildAidandtheWWF,are teachingthe publicaboutfinning.世界各地的环境保护组织，如野生救援协会和世界自然基金会，都在教育公众有关猎翅的行为。 1)句中fin本为名词，指鱼鳍。 此句中的finning由动词化的fin（割鲨鱼鳍以获取鱼翅）的-ing形式转化而成，指课文中所陈述的猎翅这一行为。 2)WildAid和WWF组织WildAid（美国野生救援协会）是保护野生动物及栖息地环境的一个非盈利性的机构，1999年注册成立，其宗旨是保护及救助世界范围内的野生动物；WWF（世界自然基金会）英文全称为World WideFund forNature，成立于1961年，是享有国际盛誉，全球最大的独立性非政府环境保护组织之一。 VII.Homework Write5measures toprotect the environment.Section A3(Grammar Focus-4c)I.Revision1.Check if you knowthese phrases.不同种类的污染河底把垃圾扔到河里在中起作用在中国南部对有害在顶部海洋生态系统2.Translate thesesentences intoEnglish.甚至是河底都满是垃圾。 这个方法不仅残酷还对环境有害。 鲨鱼处于海洋食物链的顶部。 许多人相信鱼翅对健康有好处。 II.Grammar FocusPay attentiontothesentences.1)Were tryingto savethe earth.2)The riverused tobesoclean.3)The airisbadlypolluted.4)No scientificstudies haveshown thatshark finsaregoodforhealth.5)We shouldhelp savethesharks.1.现在进行时:Present Progressive定义表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。 结构:be(am/is/are)+v.-ing标志词Look,Listen,now,right nowe.g.Look!The boyis crying.2.usedtodo与be usedto doingusedtodo sth.表示过去常常做某事,而现在往往不做了,后接动词原形。 be usedto doingsth.表示习惯于做某事。 e.g.I usedtogetup atsix oclock.Joe isusedtodrinking acup ofcoffee everymorning.3.被动语态Passive voice定义表示主语是动作的承受者，即行为动作的对象的一种语态。 结构be+过去分词e.g.A newschool wasbuilt last year.Our classroomis cleanedeveryday.4.现在完成时:Present Perfect定义表示动作已经完成,但对现在造成影响;或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。 结构:has/have+过去分词标志词already,yet,ever,never,since,fore.g.I havent finishedmyhomeworkyet.5.情态动词1)情态动词本身有一定的词义，表示说话人的情绪、态度或语气，但不能单独作谓语，只能与其他动词构成谓语。 常见的有can(could),may(might),must,need,shall(should),will(would)等。 2)情态动词无人称和数的变化,后接动词原形。 否定式是在情态动词后面加not。 个别情态动词有过去式形式,可用来表达更加客气、委婉的语气。 e.g.Ken canclimb up the tresslike akoala.Tracy couldrideabicycle when she wasfive yearsold.You mustnt playwith fire.It isdangerous.III.Practice1.Work on4a.Fill inthe blankswith thecorrect formsoftheverbs inbrackets.Joe:_youever_(take)partin an environmentalproject?Eric:Yes,I have.I_(help)with aClean-Up Daylastyear.It was_(consider)the biggestclean-up projectthis city_ever_(have).Joe:How manypeople_(take)part?Eric:I_(think)more than1,000people_(e)to helpout.Joe:Thats fantastic!I guesseveryone inthis cityis_(try)to improve theenvironment.Eric:Yes,we cant afford to_(wait)any longerto takeaction!Learn somenew wordsand expressions.2.Work on4b.Fill inthe blankswith theappropriate modalverbs from the box.The wordsare:can,would,could,have to,should,must,may/might People_thinkthatbig things_be done to savethe earth.Many forgetthat savingtheearthbegins withsmall things.For example,you_save electricityby turning offthe lightswhen youleave aroom.You_also use reusable bags insteadof plastic bags.I thinkitsagreat ideathat younow_pay forplastic bags in somestores.And insteadofdrivingto school or work,you_ride yourbike orwalk.If its far,you_take thebus.All thesesmall things_add upand beebig things that_improvetheenvironment.Lets takeaction now!Learn somenew wordsand expressions.3.Work on4c.Make a list of thingsthat people candoto help theenvironment anddiscuss yourlist with your partner.use public transportation(n.交通运输);turn offthe lightswhen youleave aroom;usereusablebagsinsteadofplasticbags;ride yourbike orwalk toschoolorwork;stop usingpaper napkins;recycle booksand paper4.Discussion.A:I thinkthat everyoneshould use public transportation.B:I disagree.Its difficultfor parentswith youngchildren to use publictransportationIV.Language points1.We cant affordto waitanylongerto takeaction!afford v.承担得起；提供,给予affordtodosth.(常与can,be bleto连用)买得起；有足够的e.g.We cant affordto paysuch aprice.我们付不起这个价钱。 Dancing affordsus pleasure.跳舞给我们带来快乐。 2.save electricityby turning offthe lightswhen youleave aroom.turning off关掉e.g.Please turnthe televisionoff beforeyou go to bed.睡觉前请关掉电视。 拓展turn相关短语turn around转身turn up调高（音量）turn down调低；拒绝turn into变成；进入turn on打开，发动turn off关掉，关闭turn outtobe结果是turn over移交V.Homework Finishthe exercisesintheworkbook.Section B1(1a2e)I.Revision Role-play thisconversation.A:I thinkthat everyoneshould usepublictransportation.B:I disagree.Its difficultfor parentswith youngchildren to usepublictransportationA:But we candoother things.For example,we cangotoschool onfoot.B:You areright.We shouldturn offthe lightswhen weleave theroom.II.Leading in (1)Tell studentswe shoulddo these things toprotecttheenvironment.Turn offthe lightswhen youleave aroom;Stop ridingin cars;Stopping usingpaper towelsor napkins;Recycle booksand paper.Turn offthe showerwhile youare washingyour hair.You canhelp reducepollution byputting thatsoda caninadifferent bin.Dont usepaper napkins. (2)What canwe dotohelpsavetheearth?Rank theseitems from the easiest (1)tothemost difficult (5).(1a)_stop ridingin cars_recycle booksand paper_turn offthe lightswhen youleave aroom_turn offthe showerwhile youare washingyour hair_dont usepaper napkins (3)Compare youranswers in1a withyour partner.III.Listening1c&1d (1)Listenandcheck()the thingsthat Juliaand Jacktalk about. (2)Check()the thingsthat Juliais doingnow,the things she willdo inthe futureandthethingsshe would never do. (3)Check theanswers with the wholeclass.Things Juliaand JacktalkaboutThings Juliais doingnow Things Julia willdo inthe futureThingsJuliawould neverdo_turningoffthelight_turningoffthe shower_stopping usingpaper napkins_taking yourown bagswhen shopping._not ridingin cars_riding abike_recycling paper (4)Listenagainand answer the questions below.Who reada book?Would Juliaturn offthe showerwhenshe is washingthe hair?Does Jacklive closetoschool?Get onestudent towrite theanswers onthe blackboard.Keys:Jack.No,shewouldneverdothat.Yes,he does.IV.Practice (1)Ma