Module4 Sandstorms in Asia 课件 必修三 外研版

tornadohurricaneNaturalDisastersearthquakesandstormlightningvolcaniceruptionBCDANorthAmericaCentralAfricaAustraliaCentralAsiamajorsandstormcentersinChinaGansuandWesternInnerMongoliaBeijingandNortheastInnerMongoliaPartⅢIntroduction-1.VocabularyandwritingTherehasbeena________.Ithas______fortenhoursandwasvery____________.Thewindwas________thesandhigharoundthehouse.andsomecarswerecompletely_____bythesandsandstormlastedfrighteningblowingburiedReading&VocabularyLookatthephoto.Answerthequestions.Answers:1.Thereisasandstormblowing.2.They’vewearinghoods,masksandglassestoprotectthemselves.3.Itmovesveryslowly.Becauseitisnotcleartoseeeverythingontheroadandpeoplemusttakegreatcare.4.Stayathome.Languagepoints1．majoradj.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：so＋adv.(adj.)＋that­clauseso＋adj.＋a(an)＋单数名词＋that­clausesomany(few)＋可数名词复数＋that­clausesomuch(little)＋不可数名词＋that­clause(但little意为“小的”，只能用such。)3．becaughtin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catchone’sattention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5．strengthn．[U]力量；力气；体力；实力Hehasbeendoingweighttrainingtobuilduphisstrength.他一直进行举重训练以增强体力。Muchofthecountry’smilitarystrengthliesinitsmissileforce.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。withallone’sstrength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。6．prevent...(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。7．haveaneffecton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/bringsth.intoeffect使生效、实现takeeffect生效；开始发挥作用ineffect实际上；简直是；事实上8．concernedadj.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。I’mabitconcernedabout/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9．urgentadj.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楼。【知识链接】(1)inurgentneedof急需anurgentlook急切的神情(2)urgencyn．紧急；迫切(3)urgevt.推进；极力主张；催促；激励urgesb.todo...敦促某人做……urgesb.intodoing...敦促某人做……urgesb.against强烈反对urgesb.on鼓励，激励，为……加油urge+that从句强烈要求，极力主张……(从句用虚拟语气)