Module4 Sandstorms in Asia 课件 必修三 外研版

Module4SandstomsinAsia,Introduction,tornado,hurricane,NaturalDisasters,earthquake,sandstorm,lightning,volcaniceruption,NorthAmerica,CentralAfrica,Australia,CentralAsia,majorsandstormcentersinChina,GansuandWesternInnerMongolia,BeijingandNortheastInnerMongolia,Part,Introduction-1.Vocabularyandwriting,Therehasbeena_.Ithas_fortenhoursandwasvery_.Thewindwas_thesandhigharoundthehouse.,andsomecarswerecompletely_bythesand,sandstorm,lasted,frightening,blowing,buried,Reading&VocabularyLookatthephoto.Answerthequestions.,Answers:1.Thereisasandstormblowing.2.Theyvewearinghoods,masksandglassestoprotectthemselves.Itmovesveryslowly.Becauseitisnotcleartoseeeverythingontheroadandpeoplemusttakegreatcare.4.Stayathome.,Languagepoints1majoradj.较大的，较多的；主要的，主修的；较重要的vi.主修，专攻n.主修课程；主修学生majorityn.大多数majorproblems主要问题themajorsubjects主修课程playamajorroleinsth.在某事中起重要作用majorinsth.主修a/themajorityof.的大多数Thestudentsmajorinchemistry.这些学生主修化学。Themajorityofstudentswas/wereindifferenttothepoliticalmeeting.大多数学生对政治会议漠不关心。,major/main/chief(1)major意为“重大的；主要的”，指在规模、数量、重要性方面超出同类的其他事物。(2)main意为“主要的”，强调事物的某一部分、分支的重要性、大小及潜力优于其他部分、分支，或表示整体中最主要、最明显的部分，通常只作定语。(3)chief意为“主要的；首要的”，强调在顺序、等级、重要性、价值方面高于其他所有同类事物。,2.Theyareoftensothickthatyoucannotseethesun，andthewindissometimesstrongenoughtomovesanddunes.沙尘暴经常是非常混浊的以至于你看不见太阳，而且风有时大得能够刮动沙丘。so.that通常引导结果状语从句，意为“如此以至于”。常用句型如下：,3becaughtin被困于，遭遇Iamoftencaughtinaheavytrafficonmywaytoschool.我在上学路上常常遇到塞车。Medicalteamswerecaughtinthecrossfireoftheopposingarmies.医疗队陷入了敌军的交叉火力中。【知识拓展】becaughtintheheavyrain/snowstorm/sandstorm/traffic突然遭到大雨/暴风雪/沙尘暴/交通拥挤被困住becaughtdoing被撞见做某事catchup(常与with连用)赶上,BetrappedinBestuckin,catchupwith赶上catchon理解，流行，受欢迎(=bepopularwith)catchsightof看见catchonesattention吸引某人的注意catchholdof抓住catchfire着火,4.cutdown砍倒，使倒下；削减，压缩；减价Manybigtreesalongtheroadhavebeencutdownforbuildinghouses.路边的许多大树都被砍掉用来建房了。拓展：cutacross走捷径，穿过去cutin插话；让某人分享利润cutoff中止，切断；隔绝cutout删除；裁剪cutup劈碎，切碎；使难过；(严重地)割伤cutshort突然停止，中断(活动)cutthrough穿过；克服；避开；剪断cutsth.inhalf/intwo将对半切开,5strengthnU力量；力气；体力；实力,Hehasbeendoingweighttrainingtobuilduphisstrength.他一直进行举重训练以增强体力。Muchofthecountrysmilitarystrengthliesinitsmissileforce.这个国家的军事实力主要体现在导弹部队上。Theboyliftedthestonewithallhisstrength.男孩用尽全力举起了石头。withallonesstrength尽力onthestrengthofsth.凭借(或根据)某事物strengthenv加强,【轻巧辨析】force/strength/energy/power(1)force主要指自然界的力量、暴力、势力以及法律、道德或感情的力量、效力、强制力、军事力量、武力等。(2)strength说人时，指“力气”；说物时，指“强度”。(3)energy主要指人生理上的精力或自然界中的能量、能源。(4)power主要指做一件事所依靠的能力、功能；也可指人或机器等事物潜在或所能发挥出来的力量，还可指职权、权力、政权，也可指电力、动力、功率。,6prevent.(from)阻止；制止stopsb.(from)doingsth.阻止某人做某事keepsb.fromdoingsth.阻止某人做某事protectsb.from.保护某人不受侵袭，挡住，防御keepsb.doingsth.让某人一直做某事提示：(1)在被动句中from均不能省略。如：Wewerestopped/prevented/keptfromgoingoutbytheheavyrain.大雨使我们无法外出。(2)protect.from.中from后接能带来伤害或损害之物。如：Theyhuddledtogethertoprotectthemselvesfromthewind.他们挤在一起，免受风吹。,7haveaneffecton对有影响Smokinghasabadeffectonhealth.吸烟对身体有不良影响。Theradiationleakhashadadisastrouseffecton/upontheenvironment.核辐射泄漏给环境带来了灾难性的影响。与effect构成的短语beofnoeffect无效beineffect有效come/gointoeffect生效put/carry/oeffect使生效、实现takeeffect生效；开始发挥作用ineffect实际上；简直是；事实上,8concernedadj.关心的，有关的常用于名词之后；挂念的，担心的Eg:Itisreportedthatthepopsingerisconcernedwithsellingdrugs.据报道，那个流行歌手涉嫌贩毒。Imabitconcernedabout/foryourhealth.我有点担心你的健康。concernvt.涉及，关系到；n.(利害)关系，关心concernfuladj.重要的concernedlyadv.担着心concerningprep.关于beconcernedabout/over/for关心，挂念beconcernedwith/in牵涉到，与有关as(so)faras.isconcerned就来说；就而言show/expressconcernabout对表示关心/担心asconcerns=concerning关于,9urgentadj.紧急的；迫切的；非常重要的Thelawisinurgentneedofreform.这项法律亟待修订。Themosturgentthinginafireistomakesureeveryoneisoutofthebuilding.失火时最紧要的事是确保所有人都撤离大