深圳牛津英语七年级英语下册第四单元 第一课时

深圳牛津英语七年级英语下册第四单元第一课时深圳牛津英语七年级英语下册第四单元第一课时深圳牛津英语七年级英语下册第四单元第一课时V:1.0精细整理，仅供参考深圳牛津英语七年级英语下册第四单元第一课时日期：20xx年X月Unit4Savethetrees(第一课时)一、核心词汇1.savev.拯救2.pinen.松树3.discussv.讨论4.branchn.树枝5.rootn.根6.fightv.与……作斗争7.againstv.反对8.examplen.例子9.harmfuladj.有害的10.gasn.气体11.producev.产生12.oxygenn.氧气13.majoradj.主要的14.convenientadj.方便的15.furnituren.家具16.imaginev.想象17.diseasen.疾病18.digv.挖19.holen.洞20.carryv.搬21.containern.容器二、重点短语1.fightagainst对抗，与...作斗争2.helpsb.dosth.帮助某人做某事3.knowabout知道，了解4.inmanyways在很多方面，多角度5.takein吸收，理解6.comefrom来自（befrom）7.forexample例如8.infact事实上，确切地说9.lookaround环顾四周10.(be)madeof由……制成11.millionsof大量的12.(be)goodfor对……有好处三、基础知识点Iplantthisseedintheground,willitbecomeapeartree,Hi(1)if引导条件状语从句时，意为“如果”。主句（包括祈使句和含有情态动词can，may，must等的句子）用一般现在时，从句也用一般现在时；主句用过去时，从句也用过去的某种时态；如果主句是一般将来时，从句要用一般现在时表示将来。Eg:Wewillgooutifitisfinetomorrow.Youmustseeadoctorifyouareill.a不定冠词，意为“一（个……）”，用在以辅音音素开头的单数可数名词前；在以元音音素开头的单数可数名词的前面要用不定冠词an。不定冠词a/an常放在单数可数名词前，表示一个不确定的事物或人。其用法如下：第一次提到某人或某物时，用不定冠词。Eg:You'dbettergotoseeadoctor.表示某一类中的任何一个，是泛指。Eg:Adogisausefulanimal.表示“一”的数量，但数的概念没有one强烈。Eg：Ihaveapen,apencilandtwobooks.用在表示时间、重量、速度、价格等名词前，意为“每一”。Eg:WehavesixEnglishclassesaweek.Lookaroundthisroom.与look相关的短语：lookfor寻找；lookover仔细检查，翻阅；lookafter照顾；lookup抬头看Alotoffurnitureismadeofwood.很多家具都是由木头制成的。(be)madeof(看得出原材料)=(be)madefrom(看不出原材料)意为“由...制成”。如：Thechairismadeofwood.这把椅子是由木头制成的。Paperisusuallymadefromwood.纸通常由木头制成。Butwecutdownmillionsoftreeseveryyear.但每年我们都会砍伐数百万的树木。millionsof意为“数以百万计；大量的”。如：MillionsofpeoplearoundtheworldlearnEnglish.全世界无数人在学习英语。→【拓展】：hundredsof数以百计的，成千上万的；thousandsof数以千记的，成千上万的；tensofthousandsof数以万计的；hundredsofthousandsof数以十万记的注意：hundred，thousand，million，billion等前面有具体的数词时，其后不加-s，也不带介词of。Eg:twohundred200Shecanskateataveryhighspeedbecauseshpractisesalot.Practise及物动词，意为“训练，练习”。宾语可以是名词、代词或动名词。Eg:YoumustpractisespeakingEnglisheveryday.Asaresult,thenumberofkindsofanimals,birds,insectsandtreesintheworldisdecreasing.Thenumberof意为“……的数量”。Eg:Thenumberofthestudentsinourclassis50.【拓展】Thenumberof……的数量后接复数名词，但谓语动词要用单数形式常跟large，small等词作表语Thenumberofthestudentsinourschoolis2000.Anumberof大量；许多，相当于many接复数名词作主语时，谓语动词用复数形式Number前可加small，large，huge等表示程度Anumberofstudentsareplayingfootball....butthespeakerdidnotstopspeakinguntiltwentypasttwelve.Not...Until...意为“直到……才……”。主句的动词一般是非延续性动词，它所表示的动作直到until所表示的时间才发生。Eg：Youcannotleaveuntilyourworkisfinished.知识练习：根据句意及首字母提示完成单词。Today,wearegoingtod______thetopic“Aredogspeople’sfriends”Lookatthedog.Itishurt.Shallwes______.ItTheb________ofthetreesconnectwitheachotherandpasswaterandfoodunderground.Youmustn’tparkyourcarhere.Itisa______thelaw.Theworkersaref_________againstthedecisiontoreducetheirpay.Icannoti________lifewithouttrees.Softdrinksareh___________toyourhealth.Thef___________intheroomisquiteold.选出可以替换划线部分的选项。Wecanproducefreshwaterfromtheoceannow.A.getB.workC.makeD.takeLifeismoreconvenientthanbefore.easierB.harderC.theeasiestD.thehardestTreesareimportantbecausetheycantakeinharmfulgases.A.makeB.absorbC.stopD.putYoucandomanythingsathome.Forexample,youcandosomehousework.ForinstanceB.FormoreC.ForeverD.ForyouInfact,Ididn’tlistentoourteachercarefully.ReallyB.ActuallyC.ExactlyD.Certainly单项选择Thedoctorgavehimsomepillsto__________thepain.takeoffB.takeinC.takeonD.takeaway2.Dosomesportseveryday.Itwillhelpyoukeep__________.A.healthyB.healthilyC.kindlyD.excitedly3.——Thereare_________peoplehereinourcity.——Actually,thereare__________lionsof;threemillionB.millionsof;millionsC.millionsof;threemillionofD.millionof;threemillionof——Whattimeisitnow——Itis20:00.Ithinkweshouldstop__________first.havingsupperB.havesupperC.tohavesupperD.tohavingsupper——Ibought____________furniture.——ReallyWhat________anew;isitmadeofB.anew;doesitmadeofC.anewpieceof;isitmadeofD.anewpieceof;doesitmadeofLookatthisoldbridge!Itismade__________stones.A.fromB.ofC.intoD.upI_________theswimmingclubifyou________it.A.join;joinB.willjoin;joinC.join;willjoinD.willjoin;willjoinHeheardsomeonecallinghisname,sohestoppedand________.Buthecouldn’tseeanyone.A.lookedaroundB.lookedupC.lookedintoD.lookedfor——Wecan’tlivewithouttrees.Theymakeourlives_________.——Iagree.Weshouldstoppeople_________trees.A.convenient;tocutdownB.conveniently;tocutdownC.convenient;cuttingdownD.conveniently;cuttingdownthelittledoghelpshisowner_________manyways__________hisdailylife.A.in;atB.on;inC.in;inD.on;on用所给单词的适当形式填空。Treesareimportantinour(day)livesThereare(many)peopleinthishallthanthatone.Weallknowthatsmokingis(harm)toourhealth.Airisamixture(混合物)of(gas).Mr.Greenlivesina(convenience)life.Timhasbeenafire(fight)forfiveyears.Howdoesafish(breath)underwaterManyplantsdiedbecauseofthewater(pollute).完形填空AChineseman____1_____CaiLuninventedpaperalmost2,000yearsago.Hemadepaper____2_____wood.Hethenputallthepapertogetherandmadethepaper___3_____abook.Nowwestillusewoodtomakepaper.Weusealotofpapereveryday.Ifwekeepon_____4____somuchpaper,therewillnotbeanytreesleftontheearth.If____5____notrees,therewillbenopaper.Everyday,people___6____about2,800tonsofpaper.Weuse17treestomakeonetonofpaper.Thismeanswearecuttingnearly48,000treeseveryday.Sinceit___7___morethan10yearsforatreetogrow,wemuststartusing____8____papernow.SohowcanwesavepaperWecanusebothsidesof____9____paper,especiallywhenwearemakingnotes.Wecanchoosedrinksinbottlesinsteadofthoseinpaperpackets.Wecanalsousecottonhandkerchiefs(手帕)butnotpaperones.Whenwegoshopping,wecanusefewerpaperbags.Iftheshopassistantgivesusapaperbag,wecansaveitandreuseitlater.Everyonecanhelptosavepaper.Ifweallthinkcarefully,wecanhelp___10___trees.Butweshoulddoitnow,beforeitistoolate.1.A.callB.callsC.calledD.calling2.A.fromB.ofC.intoD.for3.A.fromB.ofC.intoD.for4.A.wasteB.towasteC.wastedD.wasting5.A.therewillbeB.thereareC.therewasD.therewasn’t6.A.takeinB.putonC.throwawayD.putaway7.A.spendsB.takesC.costsD.pays8.A.manyB.fewC.fewerD.less9.A.aB.apieceC.onepieceD.many10.A.protectB.protectsC.protectingD.toprotecting阅读理解CantreestalkYes---butnotinwords.Scientistshavereasontobelievethattreesdocommunicatewitheachother.Notlongago,researcherslearnedsomesurprisingthings.Firstawillowtree(柳树)attackedinthewoodsbycaterpillars(毛毛虫)changedthechemistryofitsleavesandmadethemtastelesssothatthecaterpillarsgottiredoftheleavesandstoppedeatingthem.Theevenmoreastonishing,thetreesentoutaspecialvapor---asignalcausingitsneighborstochangethechemistryoftheirownleavesandmakethemselvestastealsoterrible,too.Talking,ofcourse,doesn’tneedtobealwaysinwords.Wecantalktoeachotherbysmiling,raisingourshouldersandmovingourhands.Weknowthatbirdsandanimalsuseawholevocabularyofsongs,soundsandmovements.Beesdancetheirsignals,flyingincertainpatternsthattellotherbeeswheretofindnectar(花蜜)forhoney.Soshyshouldn’ttreeshavewaysofsendingmessages1、Fromthepassage,whichkindofleavesdon’tcaterpillarseatleaveslyingontheground.B.leaveshavinganunpleasanttaste.C.leavesbeesdon’tlike.D.leaveshavinganunfamiliarshape.2、Thewillowtreedescribedinthepassageprotecteditselfby_________.growingmorebranchesB.talkingwithbirdsandbees.C.changingitsleafchemistryD.shakingcaterpillarsoff3、Accordingtothepassage,thewillowtreewasab