sandstormsinAsiapptPPT课件

1、1. _ (沙尘暴) have been a major disaster for many Asian countries for centuries.2. A mass _(运动)has been started to solve the problem.3. Sandstorms are strong enough to move sand _(沙丘).5. The traffic moves slowly because the thick _(尘土) makes it difficult to see.6. The Chinese Central Weather Station ca

2、n _(预报) a sandstorm some weeks before it arrives in Beijing.7. If you want to go out, youd better wear a _(面具).8. The _(力量) of the storm sometimes surprises people.SandstormscampaigndunesdustforecastmaskstrengthWords revision第1页/共34页Please look at these pictures.How beautiful they are !第2页/共34页But o

3、ne day something happened .第3页/共34页第4页/共34页What is this natural disaster ?第5页/共34页 blow bury frightening last (v) sandstorm第6页/共34页There has been a _. It _ _ for ten hours and was very _. The wind _ the sand high around the houses, and some cars were almost completely _ by the sand. sandstorm lasted

4、 /has been blowingfrighteningwas blowingburiedhas blow bury frightening last (v) sandstorm第7页/共34页Check the meaning of these words and discuss which statements are true.dig earthquake protect sign the Pacific Ocean1 Sandstorms begin in desert areas.2 Deserts are created by climate changes.3 Deserts

5、are also created because people cut down trees and dig up grass.4 Sandstorms from Asia have blown across the Pacific Ocean to America.5 Sandstorms cant be prevented.6 The inland region has more sandstorms than the one near the sea.第8页/共34页第9页/共34页Northwestern China _ _ _ strong winds and sandstorms

6、since Monday. The condition is _ to _ as cold air is moving southward. The Xinjiang vigor Autonomous Region has already been _. Weather authorities say Inner Mongolia, Ningxia and the provinces of Gansu, Shanxi and Shanxi will see rain and _ drops of temperature. Northern China many have sandstorms

7、again.has been experiencingexpectedspreadaffectedsharp第10页/共34页 A asks and B answers according to the photo 1 what is happening?2 what is the cyclist wearing and why? 3 what do you think happens to traffic in this situation? Why?4 What do you think experts advise people to do in this situationThere

8、is a sandstorm blowing. Theyre wearing masks and glasses to protect themselves. It moves very slowly. Because it is not clear to see everything on the road and people must take great care.Stay at home.第11页/共34页Skimming (略读) 方法指导方法指导1. 1. 浏览标题浏览标题 2. 2. 读首段，抓中心。读首段，抓中心。3. 3. 浏览其他段首末句。浏览其他段首末句。4.4.最后读

9、结尾段。最后读结尾段。Fast-readingRead fast and try to find the main idea of each paragraph第12页/共34页Fast Readingthis article can be divided into three parts, give the main idea of each part?Part IPart IIPart (para 1) (para2-5) (para6)Sandstorm is a_ in Asiathe_ description causeseffectssuggestionof sandstormma

10、jor disasterMeasures to prevent sandstorm:_planting trees第13页/共34页introductionSandstorms are strong, dry _ carrying _,a _ _ in Asia Main placesCauseInfluenceSuggestionMeasures Desertification ：_ changes ；_ trees；_ grassan _sky, strong_, city in a thick, brown-yellow _move slowly, difficult to see an

11、d breatheadvisenot to go out , wear a mask orangewindsclimate cut downdig updustDetailed readingmajor disasterCentral Asia, Central Africa, North America, Australiaplant more trees12sandwinds第14页/共34页Para1. Para2. 1Para3. 1Para4. Para5. 建议某人不要做某事建议某人不要做某事带着面具带着面具Para6. 组织组织做某事做某事Phrases第15页/共34页Para

12、1. try many ways to solve this problems for centuries a mass campaignPara2. as a child be caught in Para3. appear to have done as a result of cut down trees dig up grassPara4. wake up to an orange sky make it difficult to seePara5. arrive in /at surprise people advise sb. not to do sth wear a maskPa

13、ra6.prevent(from) doing, stop(from) doing, keepfrom doing第16页/共34页 The four main places in the world( where there are sandstorms) are Central Asia, North America, 括号中的句子是什么从句？( ) A. 地点状语从句 B.定语从句 C. 宾语从句 D.主语从句BPara.1and 2Central Africa and AustraliaSentences第17页/共34页1.They are often so thick that y

14、ou cannot see the sun, and the wind is sometimes strong enough to move sand dunes. para2 沙尘暴能见度经常很低以至于看不见太沙尘暴能见度经常很低以至于看不见太阳，风有时大的能够移动沙丘阳，风有时大的能够移动沙丘. so- that- 引导结果状语从句引导结果状语从句2.Ren Jianbo, described a terrible sandstorm (that) he experienced as a child in the desert. “To have been caught in a sand

15、storm was a terrible experience.” para2 任建波描述了他小时候在沙漠中经历的一任建波描述了他小时候在沙漠中经历的一次沙尘暴，次沙尘暴，“那次被围困在沙尘暴中的经那次被围困在沙尘暴中的经历真是太可怕了历真是太可怕了.”第18页/共34页3.It was the most frightening and the most (para2)dangerous situation (that) I have ever been in. 这是我经历过的最可怕最危险的情形这是我经历过的最可怕最危险的情形.4.This is a process that happens

16、（when land becomes desert because of climate changes and because people cut down trees and dig up grass.） para3 这一进程是在气候变化以及人们肆意砍这一进程是在气候变化以及人们肆意砍伐森林和破会草皮从而导致土地沙漠化的伐森林和破会草皮从而导致土地沙漠化的情况下发生的情况下发生的. 第19页/共34页“traffic moves very slowly because the thick dust makes it difficult to see.”Para.4“traffic” me

17、ans_ A. 交通 B. 车辆B第20页/共34页5The Chinese Central Weather Station can forecast a sandstorm some weeks before it arrives in Beijing, but the strength of the storm sometimes surprises people. (Para5)中国中央气象中心能在沙尘暴到达北京前几周预报沙尘暴，但沙尘暴威力有时大得惊人。第21页/共34页 “Already the government has planted more than 30 billion

18、and plans to continue planting for the next five yeas.” “Plans” 的词性是_ A. verb B. nounAand 连接并列谓语 “has planted ” 和“plans”plan to do为 固定搭配Para.6讲解：第22页/共34页Listen and fill in the blanks Sandstorms have been a major disaster for many Asian countries for centuries. Sandstorms are strong , dry winds. The

19、 wind is sometimes _ _ _ move sand dunes. “_ _ _ _ _ a sandstorm was a terrible experience,” Ren Jianbo said. Desertification is a process that happens because people _ _trees and _ _ grass. Traffic moves very slowly because the thick dust makes_ difficult _ _. So weather experts _ people _ _ go out

20、 . _ prevent it _nearer , the government is planting trees. 第23页/共34页appear to do/ to be doing/ to have done=It appears that -He appears to be talking to himself.=It appears that he is talking to himself.Sandstorms in China appear to have increased in recent years.=It appears that sandstorms in Chin

21、a have increased in recent years.It appeared that he was unhappy.=He appeared to be unhappy.appear不用进行时态第24页/共34页Talk about sandstorms in pairs. You can ask and answer the following questions, and you may add some other details:What is a sandstorm?Where does it occur in the world/ in China?What is t

22、he causes of sandstorms?What should we do if sandstorms occur?How can we prevent sandstorms?Pair workDialogue第25页/共34页cause :cutting down too many trees; desertification (沙漠化); high temperature and little rain; serious air and water pollution; the growing population of the world; improper use of lan

23、d; 1.We should plant more trees and grow more grass.2.Control air and water pollution.3.Build green fences along the desert. 4.Forecast sandstorms real time to prevent disaster.5.All countries should join hands to propose a plan in sandstorms control and prevention.Measures:第26页/共34页In order to prot

24、ect our earth, many Green Movements have been held all over the world, what should we do? 第27页/共34页Never do evil deed no matter how trifling 勿以善小而不为,勿以恶小而为之 第28页/共34页第29页/共34页Writing世界环保日前夕，联合国教科文组织就如何处理城市垃圾箱全世界中学生征文，请你以Saving Our City 为题， 写一篇100词左右的短文。提示：1. 城市污染的危害：污染环境，有害健康2. 你所在城市的处理垃圾的方式a.垃圾分类(sort) b. 报纸和玻璃的再利用 c. 填埋有害垃圾 d. 处理废水 e. 制定法律 3.