1、2012高一英语课件：M4 Sandstorms in Asia（外研版必修3）tornadohurricaneNatural Disastersearthquakesandstormlightningvolcanic eruptionBCDANorth AmericaCentral AfricaAustralia Central Asiamajor sandstorm centers in ChinaGansu and Western Inner MongoliaBeijing and Northeast Inner MongoliaPart Introduction-1.Vocabular
2、y and writingTherehas been a _.It has_for ten hours and was very_.The wind was_thesand high around the house.and some cars were completely_by the sandsandstormlastedfrighteningblowingburiedReading&VocabularyLook at the photo.Answer the questions.Answers:1.There is a sandstorm blowing.2.Theyve wearin
3、g hoods,masks and glasses to protect themselves.3.It moves very slowly.Because it is not 4.clear to see everything on the road and5.people must take great care.4.Stay at home.Language points1major adj.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majority n.大多数major problems 主要问题the major subjects 主修课程pla
4、y a major role in sth.在某事中起重要作用major in sth.主修a/the majority of.的大多数The students major in chemistry.这些学生主修化学。The majority of students was/were indifferent to the political meeting.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、
5、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.They are often so thick that you cannot see the sun，and the wind is sometimes strong enough to move sand dunes.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：3be caught in被困于，遭遇I am often caught in a
6、 heavy traffic on my way to school.我在上学路上常常遇到塞车。Medical teams were caught in the crossfire of the opposing armies.医疗队陷入了敌军的交叉火力中。【知识拓展】be caught in the heavy rain/snowstorm/sandstorm/traffic突然遭到大雨/暴风雪/沙尘暴/交通拥挤被困住be caught doing被撞见做某事catch up(常与with连用)赶上Be trapped inBe stuck incatch up with赶上catch on
7、理解，流行，受欢迎(=be popular with)catch sight of看见catch ones attention吸引某人的注意catch hold of抓住catch fire着火 4.cut down砍倒，使倒下；削减，压缩；减价Many big trees along the road have been cut down for building houses.路边的许多大树都被砍掉用来建房了。拓展：cut across 走捷径，穿过去cut in 插话；让某人分享利润cut off 中止，切断；隔绝cut out 删除；裁剪cut up 劈碎，切碎；使难过；(严重地)割伤
8、cut short 突然停止，中断(活动)cut through 穿过；克服；避开；剪断cut sth.in half/in two将对半切开5strength nU力量；力气；体力；实力He has been doing weighttraining to build up his strength.他一直进行举重训练以增强体力。Much of the countrys military strength lies in its missile force.这个国家的军事实力主要体现在导弹部队上。The boy lifted the stone with all his strength.男
9、孩用尽全力举起了石头。vwith all ones strength尽力von the strength of sth.凭借(或根据)某事物vstrengthen v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
10、力、功率。6prevent.(from)阻止；制止stop sb.(from)doing sth.阻止某人做某事keep sb.from doing sth.阻止某人做某事protect sb.from.保护某人不受侵袭，挡住，防御keep sb.doing sth.让某人一直做某事提示：(1)在被动句中 from 均不能省略。如：We were stopped/prevented/kept from going out by the heavy rain.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：They huddled together
11、to protect themselves from the wind.他们挤在一起，免受风吹。7have an effect on对有影响Smoking has a bad effect on health.吸烟对身体有不良影响。The radiation leak has had a disastrous effect on/upon the environment.核辐射泄漏给环境带来了灾难性的影响。与effect构成的短语be of no effect无效be in effect有效come/go into effect生效put/carry/bring sth.into effect
12、使生效、实现take effect生效；开始发挥作用in effect实际上；简直是；事实上8concerned adj.关心的，有关的常用于名词之后；挂念的，担心的Eg:It is reported that the pop singer is concerned with selling drugs.据报道，那个流行歌手涉嫌贩毒。Im a bit concerned about/for your health.我有点担心你的健康。concern vt.涉及，关系到；n.(利害)关系，关心concernful adj.重要的concernedly adv.担着心concerning prep
13、.关于be concerned about/over/for关心，挂念be concerned with/in牵涉到，与有关as(so)far as.is concerned就来说；就而言show/express concern about对表示关心/担心as concerns=concerning关于9urgent adj.紧急的；迫切的；非常重要的The law is in urgent need of reform.这项法律亟待修订。The most urgent thing in a fire is to make sure everyone is out of the building.失火时最紧要的事是确保所有人都撤离大楼。【知识链接】(1)in urgent need of急需an urgent look急切的神情(2)urgency n紧急；迫切(3)urge vt.推进；极力主张；催促；激励urge sb.to do.敦促某人做urge sb.into doing.敦促某人做urge sb.against强烈反对urge sb.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)
