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1、torRay,ascientist,abouttrees.JudjDr.RayJud、：Dr.Ray:Jud）：Dr.RayJud}:Dr.Ray:Whyareyousointerestedintrees,DoctorRay?They'rethebiggestandoldestlivingthingsonEarth,Judy.Butwhataretheyusefulfor?Manythings.Forexample,thewoodinyourpencil,therubberontheendofyourpenc
2、il,andthepaperinyournotebookallcomefromtrees-Also,doyouenjoybreathingfreshair?Ofcourse.Thenyoumustthanktreesforthat,too.Treesarenaturalairconditioners.Theycooktheairandcleanit.Threetreescandothejobof15airconditioners.Youknowalotabouttrees,Doctor.Notreally.S
3、cientistsareonlynowbeginningtounderstandthem.Forexample,wheninsectsattackatree,itcanwarnitsneighbours.Theothertreesthenproduceachemicaltomaketheirleavestastebadtoprotectthemselves.Sometreescanalsojointheirrootstogetherunderground,andpasseachotherfoodandwate
4、r.Treesarecommunicatingwithoneanother,butwedon'tknowhow・Aretreesindanger?Yes,theyareingreatdange匚Wecutdownandburnalotoftreeseveryyear.Wearedestroyingourbestfightersagainstpollution.Wordspollutionn.fightn.collectv.interviewv.doctorn.breathev.freshadj.natural
5、adj.airconditionern.coolV.insectn.warnv.producev.chemicaln.joinv.destroyv.againstprep.ExplainLJudyiscollectingsomefactsforaclassprojectonpollution*collectv.他喜欢集邮。collect的名词形式MeWanghasabigofoldbikes.王先生收藏有很多的旧自行车。Helikesinterestingthings.Hewantstobeagreat•他喜
6、欢收藏有趣的东西，他想成为一名伟大的收藏家。on表示“关于”abookonhistory一本关于历史的书2.3.4.thanksfor...Thenyoumustthanktreesforthat,too.thank....for因为…而感谢...同义词：thankyoufor....感谢你的帮助.谢谢你邀请我参加你的聚会.Youknowalotabouttrees.alot常用来修饰动词，意为“十分，非常”,相当于verThanksalot.Ilikebananasalot.alot用来修饰形容词或副词的比
7、较级,相当于muchIfeelalotbetter.Forexample,wheninsectsattackatree,itcanwarnneigbourSewarnv.警告，告戒warnsb.ofsth.警告某人某事Shewarnedmeofthedangerousroad,soIcrosseditcarefully,warnsb.againstdoingsth.“警告某人不要做某事”=warnsb.nottodosth.Iwarnedhimagainstswimmingintheriver.=5.Wear
8、edestroyingourbestfightersagainstpollution.againstprep.反对，违反against不能单独使用，必须放在系动词或其他动词之后Wearegoingtoplayagainstyourfootballteamnextweek.下周我们和你们的足球队进行比赛.点对点练习1.Youmustthankthegirlstheirhelp.（用合适的介词填空）2.
