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Unit3theEarth一.要点短语:1．becoveredby…由……覆盖2．protecttheEarth保护地球3．manydifferentplants许多不同的植物4．some…some…一些…一些…5．onEarth在地球上6．ontheland在陆地上7．inthesky在空中8．underthewater在水下面9．providesbwithsth=providesthforsb给某人提供某物10．makeenergy制造能源11．put…into把……放进12．undertheground在地下13．stopdoingsth停止做某事14．Itis+adj.forsbtosth对某人来说做某事很…15．letsbdosth让某人做某事16．onequarter四分之一，一刻钟17．asksbtodosth让某人做某事18．catchfish抓鱼19．fewerandfewer越来越少20．eachyear每年21．throwaway扔掉22．needsthtodosth需要某物来做某事23．keepsbalive保持某人存活24．findout查清楚,弄明白25．alongtimeago=long,longago很久以前26．intheend最后，终于二.要点解释:1.ReadaposterabouttheEarth.阅读有关地球的宣传海报。Earthn.意为“地球”，其前面需要定冠词the。eg：ThemoongoesroundtheEarth.还有“陆地，地面；泥，土”的意思，此时不需要大写。eg：Theballoonfelltoearth.onEarth=on(the)earth,意为“在地球上”。eg：WeliveonEarth.我们生活在地球上。2.TalkaboutwhatwecandotoprotecttheEarth.讨论为保护地球我们能做些什么。protectv.保护protectionn.保护protectsb./sth.from/againststh保护某人/某物免受…伤害Wemustprotecttheforestfromfire.我们必须保护森林免受火灾。3.About70%oftheEarthiscoveredbywater.百分之七十的地球是被水所覆盖.百分数做主语时，谓语动词要与它所指代的名词相一致.About60%ofthestudentsinourclassaregirls.我们班60%的学生是女孩。becoveredby被…覆盖着，表动作；Theroadiscoveredbyleavesinautumn.秋天这条路盖满了树叶。4.TherearealsomanypeoplelikeyouandmeonEarth.地球上还有很多像你我一样的人。(1)区分also;too;eitheralso常用于肯定句中，位于实义动词前，或用于be动词、情态动词之后；Healsoenjoysreading.他也喜欢阅读Heisalsoclever.他也很聪明．too通常用于肯定句末,其前有逗号.Ireallylikethissong,andIlikethefirstone,too.either用于否定句末,其前有逗号Idon’tlikesinging.Shedoesn’tlikesinging,either.(2)likev.喜欢likedoingsth喜欢做某事本句中like是介词，意为＂像„„一样＂That’snotright.Doitlikethis.那样不对，像这样做才对。5.TheEarthprovidesuswithair,waterandfood.地球为我们提供了空气、水少食物。provide及物动词，意为“提供”，providesb.withsth.=providesth.forsb.为某人提供某物.Thesunprovidesuswithlightandheat.=Thesunprovideslightandheatforus.太阳给我们提供光和热。6.Today,thereisalotofpollution.今天，有很多污染。pollution不可数名词，意为“污染”。airpollution空气污染noisepollution噪声污染Thereisalotofpollutionintheairhere.这里的空气有大量的污染。pollute及物动词，意为“污染；弄脏”Thedirtywaterfromthefactorypollutestheriver.来自工厂的脏水污染了这条河。7.Weburnthingstomakeenergy.我们燃烧一些东西来制造能量.burn及物动词，=set.....onfire意为“燃烧；点燃”.energy不可数名词，意为“能量；能源”makeenergy“制造能量；获取能量”Sheburnsallherbooks.她把书全烧了。Itisimportanttosaveenergy.节省能源十分重要。Now,peopleusewater,thewindandthesuntomakeenergy.如今，人们利用水、风和太阳来获取能量。8.Weputourrubbishintotheseaandundertheground.我们把垃圾倒入海洋、埋入地下。put…into把…放入…；把…倒入…Theyputthewastewaterintotheriver.他们把废水倒入河中。Pleaseputallyourtoysintothebox.请把你所有的玩具都放入这个箱子里。拓展】和put有关的短语：putup举起；张贴putoff推迟；推延putaway把„„收拾好putdown放下；写下；记下puton穿上putout熄灭；扑灭9.Wemuststopdoingthesethings.我们必须停止做这件事。stopdoingsth意为“停止做某事”，即停下手头正在做的事情。It’stimeforclass.Stoptalking.到上课时间了，不要说话了。区分：stopdoingsth停止手头正在做的事情stoptodosth停下手头的事情，去做另一件事情（停下来去做.......）Westoppedtotalkwhenwemetinthestreet.当我们在街上碰见时，我们停下来说话。Wearealltired.Let’sstoptohavearest.我们都累了，停下来休息一会儿吧。10.ItisimportantforustoprotecttheEarthforourfuture.对我们来说，为未来而保护地球是重要的。Itis+形容词adj.+forsb.+动词不定式短语todosth对某人来说做某事是…ItisimportantforustolearnEnglish.对我们来说学英语很重要。It’sveryusefulforustolearnEnglishwell.对我们来说学好英语很有用。Itisgoodformetoeatmorevegetables.多吃蔬菜对我而言是有好处的。以上句型中，有时也可将forsb.省去，即Itis+adj.+todosth.做某事是…样的习题练习一.同义词()1.Thewaterintheriverisverydirtyanditkillslotsoffishinit．A.makes…cleanB.makes…healthyC.makes…interestingD.makes…die()2.WeshouldprotecttheEarthfromnowon,orwe'llbeindanger.A.keep…safeB.keep…dirtyC.keep…freshD.keep…beautiful()3.Thecarsgiveoutlotsofbadgases(气体)andtheypollutetheair.A.make…cleanB.make…freshC.make…newD.make…dirty()4.Ourschoolgivesuslotsofchancestoshowourselves.A.helps…withB.provides…withC.throws…awayD.puts…into()5.Thegarageisn’tlargeenoughfortwocars.A.goodB.bigC.highD.wide二.根据句意及首字母提示完成单词.1.WeallknowthattheE___________isround.2.Somepeopleareworkinginthef___________bytheriver.3.Whichonedoyoulikebetter,thel___________oneorthesmallone.4.Thel___________isusedforgrowingfood.5.Thisarticlehastwop___________.6.Alionisthekingofthef___________.7.Manypeooplestillburnwoodtomakee________.8.Weoftenhaveaq_________atthebeginningoftheclass.9.Don'tt_________awaytherubbishintheriver.10.It'si___________forustokeepourbodyhealthy.三.用括号内所给单词的正确形式填空。1.Franceisa___________(beauty)seaside(海边)country.2.Iwaterthe___________(plant)twiceaweek.3.Mydressis___________(difference)fromyours.4.Isawmany___________(animal)inthezooyesterday.5.There___________(be)twobooksandapencilonthedesk6.Wecangetalotof_________(energy)fromfood.7.MissLi,canyouhelpme?Ican'tsolvethesedifficult_________(problem).8.Thelittlegirlissosadthatshejustcan’tstop__________(cry)9.Three__________(quarter)oftehworld’ssurfaceiscoveredwithwater.10.It’sgoodforus_______(listen)toEnglishoften.四.单项选择.()1.Therearedifferentanimals_________Earth.A.onB．inC.withD.to()2.----Whatdotheplantsneedtolive?----Theyneed_________andwater.A.alightB.lightsC.lightD.manylights()3.Wheredoanimalslive?---Somelive___________theland.Somefly___________thesky.A.on;inB.to;onC.in;inD.on;on()4.Stop_________aroundandgetonwiththejob.A.playB.toplayC.playsD.playing()5.----_________istheweatherliketodayinGuangzhou?----Itissunnyandhot.A.HowB.WhyC.WhatD.When()6.WearegoingtolistentoDoctorWang's_________intheschoolhall.A.reportB.repeatC.problemD.question()7.Taiwanis