外研版高中英语必修3：Module 4 Period One课件

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1、Module 4 Sandstorms in Asia,Most of the sandstorms that had swept China last year originated from foreign land，a Chinese official in charge of desertification control said on Monday.And the invasions(入侵) could partly explain the frequent sandstorms in the country in recent years despite its achievem

2、ents in desertification control. Since the start of last spring，the north and northwestern Chinese regions had been hit by 17 sandstorms，of which，a dozen came from foreign land.,话题导入,Situated in the central-Asia sandstorm region，one of the worlds four largest sandstorm sources，China also suffers fro

3、m sandstorms from outside the country while being blamed as a sand source to northeast Asia.The other three major sources are in Africa，North America and Australia. The land suffering from desertification has been decreasing by 7,585 sq.km annually in China，and the area of sandy land has also been f

4、alling by 1,284 sq.km a year.,The shrinkage(收缩) forms a clear contrast to the fact that the land suffering from desertification and sandy feature was added by 10,400 sq.km and 3,436 sq.km late last century，respectively. Currently，the desertification land in China makes up 2.64 million sq.km，accounti

5、ng for 27.46 percent of the nations land，and its sandy land totals 1.74 million sq.km，accounting for 18.1 percent of the countrys total.,根据短文完成下列各题 1.Where do most of the sandstorms in China come from? _ 2.What does the underlined word “decreasing” mean in Paragraph 4? _ 3.Which is believed to be th

6、e sand source to northeast Asia? _,Foreign countries.,It means “going down”.,China.,基础自测,内容索引,要点探究,达标检测,课文预读,Period One Introduction & Reading and Vocabulary,基础自测,.重点单词,1. adj.吓人的；可怕的vt.使惊吓 2. adj.内陆的；内地的n.陆地 3. n.进程；过程 4. n.公民，市民 5. n.沙尘；灰尘 6. n.力量；力气adj.强健的，强壮的,frightening,frighten,inland,land,pro

7、cess,citizen,dust,strength,strong,1. 砍倒 2. 挖 3. 突然遭遇(风暴等) 4. 由于，因为，作为的结果 5. 一个接一个地,.重点短语,cut down,dig up,be caught in,as a result of,one after another,.重点句式,1.so.that.如此以至于 They are often thick you cannot see the sun，and the wind is sometimes strong enough to move sand dunes. 沙尘暴常常很大，以至于遮住了太阳，有时风力大得

8、足以移动沙丘。 2.不定式作主语 “ was a terrible experience，” he said. 他说：“遇上沙尘暴是一种可怕的经历。”,so that,To have been caught in a sandstorm,3.makeitadj.to do The storms sometimes continue all day and traffic moves very slowly because the thick dust makes it difficult (see). 沙尘暴有时持续一整天，车辆开得很慢，因为浓浓的尘埃降低了能见度。,to see,课文预读,.

9、阅读课文，匹配段落大意,1.Para.1 A.The description of strong sandstorms. 2.Para.2 B.The effects of sandstorms on Beijing. 3.Para.3 C.The measures to prevent sandstorms coming to Beijing. 4.Para.4 D.Sandstorms，Asian major disaster. 5.Para.5 E.What to do in a sandstorm. 6.Para.6 F.Northwest China，a sandstorm cent

10、er.,答案,.课文判断正(T)误(F),1.Sandstorms are strong，wet winds that carry sand.( ) 2.Sandstorms come from the desert areas.( ) 3.The land becomes desert mainly because of climate changes.( ) 4.Sandstorms in China seem to have increased in recent years.( ) 5.Sandstorms usually continue several months in Beij

11、ing.( ),F,T,F,T,F,答案,1.What is the best description about a sandstorm according to the text? A.It has been a major disaster for many Asian countries for centuries. B.It is strong winds carrying sand. C.It is a way to cause land to become desert. D.It is a kind of natural disaster that cant be treate

12、d.,.课文阅读理解,答案,1,2,3,4,5,2.What is the main reason for the increase of sandstorms in China recently? A.To be close to many deserts. B.The worsening of the weather in China. C.Desertification. D.Cutting down trees and digging up grass.,答案,1,2,3,4,5,3.What effects are sandstorms bringing to people livi

13、ng in cities? A.The whole city is usually covered in a thick and brown-yellow dust. B.Traffic moves very slowly. C.People cant breathe well and the dust makes them ill. D.All of the above.,答案,1,2,3,4,5,4.What is the best way to avoid the effects from the sandstorm? A.To live far away from deserts. B

14、.To stay at home when a sandstorm happens. C.To wear a mask if you want to go out. D.To plant more trees.,答案,1,2,3,4,5,5.Which of the following is NOT the element to make Central Asia，North America，Central Africa and Australia the four main places where there are sandstorms? A.The climate in these p

15、laces is rather bad. B.They are all the places with big deserts. C.The natural environment in these places is worsening every year. D.The governments in these places pay little attention to the protection of nature.,答案,1,2,3,4,5,This is a process that happens when land becomes desert because of clim

16、ate changes and because people cut down trees and dig up grass. 句式分析 本句是一个复合句。主句是 ；that happens.为 从句修饰process；when land.为 从句；because of climate changes和because people cut down trees and dig up grass分别是和 从句。 自主翻译 _,.课文难句分析,This is a process,定语,时间状语,原因状语,原因状语,这是一个因气候变化和人类砍树挖草导致土壤沙化的过程。,In recent years

17、，with the development of economy and the society，the environment is getting worse and worse.There are more and more sandstorms in our country，especially in the north.Its high time we should take measures to reduce sandstorms and protect our home.What measures should we take to prevent sandstorms? Do

18、 a survey in your school or in your community and then write a report on how we should do to achieve our goal.The following tips may help you：,核心素养提升,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

19、 time to prevent disasters. 5.Establish sandstorms data bank and collect information about sandstorms. 6.All countries should join hands to propose a plan in sandstorms control and prevention.,要点探究,重点词汇,It lasted for ten hours and was very frightening. 它(这场沙尘暴)持续了十个小时，非常可怕。,(1)frightening adj.令人害怕的，

20、吓人的 (2)frightened adj.害怕的 be frightened of/at/that.害怕 be frightened to do sth. 害怕去做某事,(3)frighten vt.使害怕 frighten sb. away吓走某人 frighten sb. to death把某人吓得要死 frighten sb. into doing sth. 恐吓某人做某事 frighten sb. out of doing sth. 恐吓某人使其不敢做某事 注意：frightened，shocked，surprised，amazed等由过去分词转化而来的形容词多用于说明人自身的感受，

21、还可以修饰voice，expression，smile，look等可以表示人的心理活动的词。frightening，shocking，surprising，amazing等由现在分词转化而来的形容词多用于说明事物自身的属性。,(1)He drove at a speed which frightened Lucy to death. 他开车的速度把露西吓得要死。 (2)The boy was too frightened to speak. 那男孩吓得不敢说话。 (3)From her frightened look we knew that she was frightened of the

22、 frightening scene. 从她惊恐的表情中，我们知道她对那可怕的场面感到害怕。 (4)They the paper. 他们恐吓那位老太太签了字据。,frightened the old lady into signing,单句改错 (5)I had a frightened experience while I was walking in the field.,frightening,Deserts are also created because people cut down trees and dig up grass.人们砍树挖草也造成了土壤的沙化。,cut down砍

23、倒；杀死；削减；缩小(尺寸、数量等) cut out剪除；切掉，割掉；停止；放弃 cut up切碎；使伤心 cut off切断；停掉；隔绝 cut in插入；插嘴 cut across/through抄近路穿过,(1)You can cut out the unimportant details. 你可以去掉不重要的细节。 (2)I was from the outside by the terrible earthquake. 可怕的地震使我与外界失去了联系。 (3)We were having a heated discussion when my sister . 我们正在热烈地讨论，这

24、时我妹妹插嘴了。,cut off,cut in,一词多义 写出下列句子中cut down的汉语意思 (4)These people do not have equipment to cut down the trees. _ (5)The whistling bullets cut the enemy soldiers down like corn. _ (6)My mother cut down fathers trousers to fit me. _ (7)May I suggest that you cut down the quantity of your order by half

25、？ _,削减,砍伐，砍倒,杀死,缩小(尺寸),Scientists have tried many ways to solve this problem and in China，a mass campaign has been started to help solve it. 科学家们尝试了许多方法来解决这个问题，在中国，一场大规模的解决沙尘暴问题的行动已经开始了。,mass adj.大量的；大规模的，广泛的；n.团，块，堆；大量，许多；vt.&vi.集结；聚集 mass production批量生产 the masses群众 masses ofa mass of许多，大量(可用来修饰可数

26、名词，也可用来修饰不可数名词。作主语时，a mass of谓语动词的单复数与其后的名词保持一致；masses of谓语动词的单复数与masses保持一致。) 许多短语都有“许多的，大量的”之意，可修饰可数或不可数名词。,plenty of lots ofa lot of,可数或不可数名词,numbers ofa number of a good/great many quite a few,可数名词复数,a great deal of quite a little,不可数名词,(1)Their latest produce is aimed at the mass market. 他们的最新农

27、产品瞄准了大众市场。 (2)His heart is linked with the hearts of the masses. 他和群众心连心。 (3)There were clouds in the sky. 天上有大块的云团。,masses of/a mass of,单句改错 (4)So far，a mass of books has been handed out.,have,“To have been caught in a sandstorm was a terrible experience，” he said. 他说：“遇上沙尘暴是一种可怕的经历。”,be caught in(

28、be trapped inbe stuck in)遭遇上 catch构成的常见短语： catch up with赶上 catch hold of抓住，握住 catch sight of看见 catch sb. doing sth. 抓住/发现某人正在做某事,(1)Youll have to work harder to catch up with the top students. 你必须更加努力地学习，才能赶上优秀的学生。 (2)The child caught hold of his mothers hand tightly in the earthquake. 在地震中这个孩子紧紧抓住妈

29、妈的手。 (3)She a car in the distance，but I saw nothing. 她看到远处有一辆车，但是我什么也没看见。 (4)The teacher in class. 老师逮住他在课堂上睡觉。,caught sight of,caught him sleeping,高级表达 (5)As she was caught in a heavy traffic，she was late for the meeting. (用过去分词短语作状语改写)，she was late for the meeting.,单句改错 (6)If a cook is caught smok

30、e in the kitchen，he will be fired immediately.,smoking,Caught in a heavy traffic,.，but the strength of the storm sometimes surprises people. ，但是沙尘暴的威力有时让人意外。,(1)strength n.U力量；力气；意志力；坚强；C强项，优势，长处 have the strength to do sth. 有做某事的力气/意志力 build up ones strength增强体力 with all ones strength用尽全身的力气 streng

31、ths and weaknesses强项和弱项；优缺点 (2)strengthen v.加强，巩固；变强 (3)strong adj.强健的，强壮的,(1)She didnt have the strength to walk any further. 她没有力气继续走下去了。 (2)He has been doing morning exercises to build up his strength. 他一直进行晨练以增强体力。 (3)The exercises are designed . 这些运动的目的在于增强你的腹部肌肉。,to strengthen your stomach mus

32、cle,单句改错 (4)He lifted the stone with all his strengths. (5)Everyone has his or her strength and weaknesses.,strength,strengths,经典句式,They are often so thick that you cannot see the sun，and the wind is sometimes strong enough to move sand dunes. 沙尘暴常常很大，以至于遮住了太阳，有时风力大得足以移动沙丘。,(1)本句中的so.that.意为“如此以至于”。

33、so是副词，修饰形容词或副词；that引导结果状语从句。具体有以下几种形式：,soadj./adv.that从句 soadj.a/an可数名词单数that从句 somany/few/much/little(少)可数名词复数或不可数名词that从句,(2)such.that.中的such常用来修饰名词。主要有以下几种形式：(3)so和such放在句首时，主句要用部分倒装。 (4)so that也可连在一起使用，引导结果状语从句或目的状语从句；引导目的状语从句时相当于in order that。,sucha/anadj.可数名词单数that从句 suchadj.不可数名词that从句 suchad

34、j.可数名词复数that从句,(1)He is so excellent a student that we all want to make him our example. 他是个如此优秀的学生，以至于我们都想以他为榜样。 (2)There were people there I wasnt able to pick her out. 那儿有很多人，以至于我没认出她来。 (3) careless that he didnt pass the final exam. David如此粗心，以至于他没通过期末考试。 (4)We got up early we could catch the fi

35、rst bus. 我们很早就起床了，以便能赶上第一班公共汽车。,so many,that,So,was David,so that/in order that,句型转换 (5)It was so hot a day that nobody wanted to do anything. It was that nobody wanted to do anything. (6)The teacher spoke so fast that I could not follow him.the teacher that I could not follow him.,such a hot day,So

36、 fast did,speak,单句改错 (7)He had made so great progress that the teacher praised him.,such,The storms sometimes continue all day and traffic moves very slowly because the thick dust makes it difficult to see. 沙尘暴有时持续一整天，车辆开得很慢，因为浓浓的尘埃降低了能见度。,makes it difficult to see是makeitadj./n.(for sb. )to do结构，it是

37、形式宾语，代替后面的动词不定式短语。常用于此结构的动词还有feel，think，find，consider等。,(1)The location made it difficult to lead a quiet personal life. 这地方很难让人安静地生活。 (2)Ive found it interesting to talk with foreigners in English. 我发现用英语与外国人交谈很有趣。 (3)Ive never . 我已养成凡事从容不迫的习惯。,made it a rule,to hurry,句型转换 (4)I found it was hard to

38、 take in what the teacher said. I what the teacher said.,found it hard to take in,单句改错 (5)He felt that an honour to be invited to the party.,it,达标检测,.单句语法填空,1. curious was he about the situation that he decided to look for more information. 2.The meeting was over and the people walked out of the hal

39、l one _ another. 3.The heavy rain made impossible to hold the sports meeting on time. 4. (persuade) him to give up the plan is not an easy thing. 5.The situation shes in is hopeless. 6.The girl (catch) in the traffic jam and felt nervous.,So,after,it,To persuade,that/which,was caught,7.People are no

40、t allowed to cut trees on the mountain. 8.Id like to do something to (strength) our friendship. 9.The player had to give up this game a result of his injury. 10.I felt really (frighten) to hear the large sound over my head.,down,strengthen,as,frightened,.完成句子,11.I got up early this morning to catch

41、the early train. I got up early this morning I could catch the early train. 12.The boy was so clever that he was able to work out the puzzle. The boy was clever work out the puzzle. 13.She made such a good meal that we all ate far too much. She made so that we all ate far too much.,so that,enough to

42、,good a meal,14.It appeared that she had been kept waiting for a long time. She appeared waiting for a long time. 15.It was difficult for us to arrive at the airport on time because of the heavy rain. The heavy rain for us at the airport on time.,to have been kept,made it difficult to arrive,.课文语法填空

43、,Sandstorms，strong dry winds that carry sand，16._ (strike) some Asian countries for centuries.As 17. result of desertification，sandstorms in China seem to have increased in recent years.This is a process that 18. (happen) when land becomes desert because of climate changes and 19. people cut down tr

44、ees and dig up grass.Northwest China is part of the sandstorm centre in Central Asia.,have struck,a,happens,because,Sandstorms sometimes have a very bad effect 20._ Beijing，21._(especial) on its weather and traffic.22. (solve) the problem，many ways have been tried.For example，in order to stop the desert，23. is only 250 km away to the west，24. (come) nearer to Beijing，the government is planting trees.So far，over 30 billion trees 25. (plant) and more trees will be planted for the next five years.,To solve,which,coming,