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1、Module4-Sandstorms-in-Asia-课件-必修三-外研版tornadohurricaneNatural Disastersearthquake sandstormlightningvolcanic eruptionBCDANorth AmericaCentral AfricaAustralia Central Asiamajor sandstorm centers in ChinaGansu and Western Inner MongoliaBeijing and Northeast Inner MongoliaPart Part Sandstorms in AsiaPhe
2、nomena（现象）（现象）places causes 引起引起 effects 影响影响 advices solution(解决方案)strong,dry winds that carry sand，Central AsiaNorth AmericaCentral Africa terrible,the most frightening,dangerousAustralia Desertification，climate changes cut down trees，dig up grassan orange sky,strong winds cover in a thick,brown-y
3、ellow dust move slowly,difficult to see,breathe,ill not to go out,wear a mast plant treesIntroduction-1.Vocabulary and writingTherehas been a _.It has_for ten hours and was very_.The wind was_the sand high around the house.and some cars were completely_by the sandsandstormlastedfrighteningblowingbur
4、iedReading&Vocabulary Look at the photo.Answer the questions.Answers:1.There is a sandstorm blowing.2.Theyve wearing 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 p
5、oints1major adj.较大的，较多的；主要的，主修的；较重要的较大的，较多的；主要的，主修的；较重要的vi.主修，专攻主修，专攻n.主修课程；主修学生主修课程；主修学生majority n.大多数大多数major problems 主要主要问题问题the major subjects 主修主修课课程程play a major role in sth.在某事中起重要作用在某事中起重要作用major in sth.主修主修a/the majority of.的大多数的大多数The students major in chemistry.这些学生主修化学。这些学生主修化学。The majo
6、rity of students was/were indifferent to the political meeting.大多数学生对政治会议漠不关心。大多数学生对政治会议漠不关心。major/main/chief(1)major 意为意为“重大的；主要的重大的；主要的”，指在，指在规模、数量、规模、数量、重要性重要性方面方面超出超出同同类类的的其他事物其他事物。(2)main 意意为为“主要的主要的”，强强调调事物的事物的某一部分某一部分、分支分支的重要的重要性性、大小及潜力大小及潜力优优于于其他部分其他部分、分支分支，或表示整体中最主要或表示整体中最主要、最明最明显显的部分的部分，通常
7、只作定通常只作定语语。(3)chief 意意为为“主要的；首要的主要的；首要的”，强强调调在在顺顺序序、等等级级、重要重要性性、价价值值方面方面高于其他所有高于其他所有同同类类事物事物。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。得能够刮动沙丘。so.that通常引导结果状语从句，意为通常引导
8、结果状语从句，意为“如此如此以至于以至于”。常用句型如下：。常用句型如下：4,survive vt.&vi.活下来，幸存，保存下来活下来，幸存，保存下来*洪水过后，幸存者极少。洪水过后，幸存者极少。vFew survived after the flood.*在那次可怕的事故中只有一个人生还。在那次可怕的事故中只有一个人生还。vOnly one person survived the terrible accident.vsurvival n.幸存者幸存者 *wake up to 认识到，意识到，发觉认识到，意识到，发觉v直到参加工作他才意思到学习的重要性。直到参加工作他才意思到学习的重要性。
9、vHe didnt wake up to the importance of study until he joined in the work.*wake up 醒来，叫醒醒来，叫醒 Dont make a noise or you will wake the baby up.别出声，要不然会吵醒孩子的。别出声，要不然会吵醒孩子的。.because the thick dust makes it difficult to see.*make it+adj.+to do.vit 是形式宾语是形式宾语，adj.作补语作补语,to do是真正宾语是真正宾语*他的解释使得我们对课文的理解别得容易起来
10、。他的解释使得我们对课文的理解别得容易起来。vHis explanation made it easy for us to understand the text.*as a result 结果结果 *出了一起交通事故，结果出了一起交通事故，结果5人丧身。人丧身。vAn accident took place,as a result five people were killed.vas a result of=because of 由由.产生的结果产生的结果*他因病不能工作他因病不能工作vHe could not work as a result of his illness.3be cau
11、ght in被困于，遭遇I am often caught in a 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 i
12、nBe stuck incatch up with赶上catch on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*To prevent it coming nearer,.为阻止沙漠的逼近为阻止沙漠的逼近.*preventfrom doing阻止或防止阻止或防止干干v大雨使他们不能按时到达那里。大雨使他们不能按时到达那里。vThe heavy rain prevented them from getting there on time.*pre
13、vent(from)doing =stop(from)doing/keepfrom doing 疾病使他无法上学。疾病使他无法上学。vHis illness kept him from going to school.vSorry to keep you waiting so long.*surprise*vt.使惊奇，使震惊；感到惊奇使惊奇，使震惊；感到惊奇 使我惊奇的是他英语说得那么好使我惊奇的是他英语说得那么好。vWhat surprised me was that he spoke English so well.听到你说的那件事我很惊奇。听到你说的那件事我很惊奇。vIm surpri
14、sed to hear you say that.*n.惊奇惊奇,诧异；使人惊奇的事，出人意料诧异；使人惊奇的事，出人意料vHis face showed surprise at the news.听到这消息，他脸上露出惊奇的神色。听到这消息，他脸上露出惊奇的神色。in surprise 惊奇地惊奇地 to ones surprise 使使.惊奇的是惊奇的是 3 situation n.位置位置,地位地位,形势形势,情况情况,处境处境*这个房子的地点很好。这个房子的地点很好。vThe house has a fine situation.*形势非常复杂。形势非常复杂。vThe situatio
15、n was complicated.*政治局势政治局势 v political situation*经济局势经济局势v economic situation 4.cut down砍倒，使倒下；削减，压缩；减价砍倒，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：拓展：cut across 走捷径，穿过去走捷径，穿过去cut in 插话；让某人分享利润插话；让某人分享利润cut off 中止，切断；隔绝中止，切断；隔绝cut out 删除；裁
16、剪删除；裁剪cut up 劈碎，切碎；使难过；劈碎，切碎；使难过；(严重地严重地)割伤割伤cut short 突然停止，中断突然停止，中断(活动活动)cut through 穿过；克服；避开；剪断穿过；克服；避开；剪断cut sth.in half/in two将将对半切开对半切开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 forc
17、e.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.男孩用尽全力举起了石头。v with all ones strength尽力v on the strength of sth.凭借(或根据)某事物v strengthen 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。感情的力量、效力、强制力、军事力量、武力等。(2)strengt
18、h说人时，指说人时，指“力气力气”；说物时，指；说物时，指“强度强度”。(3)energy主要指人生理上的精力或自然界中的能量、能源。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、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。政权，也可指电力、动力、功率。6prevent.(from)阻止；制止阻止；制止stop sb.(from)doing sth.阻止某人做某事阻止某人做某事keep sb.from
19、 doing sth.阻止某人做某事阻止某人做某事protect sb.from.保保护护某人不受某人不受侵侵袭袭，挡挡住住，防御防御keep sb.doing sth.让让某人一直做某事某人一直做某事提示：提示：(1)在被动句中在被动句中 from 均不能省略。如：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。大雨使我们无法外出。(2)protect.from.中中 from后接能带来伤害或损害之物。如：后接能带来伤害或损害之物。如：They huddled together
20、 to protect themselves from the wind.他们挤在一起，免受风吹。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 st
21、h.into effect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co
22、ncerning prep.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 o
23、f 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)What causes sandstorms?What can we do to stop sandstorms?It can be
24、 reduced if we try to“repair”desert and protect areas that are in danger of becoming desert.We should be more careful with our water,try to use less and recycle as much water as possible.Water is the source of life,but it is not inexhaustible.If we did not take action now,the last drop of water in the world would be mans tear!水是生命之源，但它却不是取之不尽，用之不竭的。如果我们现在不采取行动，世界上的最后一滴水将是人类的眼泪！谢谢大家！