外研版高中英语必修3module4教案introduction.docx

1、外研版高中英语必修3module4教案introductionModule 4Sandstorms in AsiaIntroduction整体设计教材分析在本节课中学生将会学到一些关于天气的词汇, 重点是用来描述沙尘暴的词汇。教材设计了三个活动来逐渐熟悉本模块的话题, 学生可以通过教材设计的三个活动来加深对本单元话题的理解, 并能流利地表达沙尘暴发生时的场景。活动一可以设计成看图说话, 教师要引导学生想象和回想沙尘暴发生时的场景并准确地描述出来。活动二的判断正误可以使学生对当今地球的环境恶化有个更深地了解。最后的小组讨论活动涉及人们在沙尘暴中的自我保护和对改造环境能够作出什么样的努力。学生通过

2、本节课的学习, 能够对沙尘暴这种天气现象作出准确的描述并能分析其原因和给出解决方法。三维目标1知识与技能1）Make students master some new words. 2）Encourage students to know how to describe a sandstorm. 2过程与方法Train students speaking ability through individual and pair work. 3情感与价值Get students to know the harm that sandstorms do to human beings and try

3、to develop their sense of environment protection. 教学重点Get to know some information about sandstorms and encourage students to use their own words to describe them. 教学难点Learn some new words and other information about sandstorms. 教学方法Individual work, pair work to get every student to participate in c

4、lass. 教学过程 Step 1 Background about the topic of this module1Talk about the topic of this module as an introduction. Show the following passage to students on the screen. About SandstormThe topic of this module is “environmental conservation”（环境保护）. This module mainly introduces something about the s

5、andstorms in Asia, especially in China. At the same time, it brings in some words about sandstorms and environmental conservation. What is a sandstorm? A sandstorm, a kind of disastrous（灾难性的）weather system, is a combination of sand and strong wind. What on earth causes sandstorms? In my opinion, sev

6、ere sandstorms are usually caused by both natural and contrived（人为的）factors, that is, climatic, geographical, social and human factors. Of all the factors, the overuse of natural resources, such as cutting down too many trees and opening up too much untouched land, leads to the frequent occurrence o

7、f sandstorms. Where does a sandstorm usually go? As mentioned above, disastrous as it is, a sandstorm does not go everywhere, coming to only those places with dry weather and little vegetation（植物的总称, 植被）. Take China for example, in the northwest of China, where there is little forest, sandstorms are

8、 worsened with（因为而恶化）peoples activities like digging up grass and mining（采矿）. Bare land easily gives away its land when strong winds come, interaction of sand and wind forming a sandstorm. And what damage will sandstorms usually cause? In a word, a lot of damage. Sandstorms can kill people and anima

9、ls, put down buildings and cause poor harvests. Whats more, they can pollute the atmosphere and blow away top soil. 2Discussion:As senior students, what should you do to prevent sandstorms?Here are some valuable suggestions:1）Control air and water pollution;2）Build green fences along the desert;3）Fo

10、recast sandstorms real time to prevent the disaster;4）All countries should join hands to propose a plan in sandstorm control and prevention. What can you add to these suggestions?Students can discuss and add more to the above suggestions. Step 2 Activity 1Introduction is the warming-up of this modul

11、e. This part mainly introduces some words related to sandstorms. Well learn it by finishing the following 3 activities. Activity 1（Page 31）Option One1Ask students to look at the picture and ask “What happens? ”Students will give their possible answers like this:There is a terrible sandstorm. Some ca

12、rs are almost buried. That is, they are almost covered with sand. The teacher can lead in and repeat the words in the box. blowburyfrighteninglast（v. ）sandstorm2Then ask students to complete the sentences using the correct form of each of these words in the box. There has been a_. It_ for ten hours

13、and was very _. The wind_ the sand high around the houses, and some cars were almost completely _ by the sand. Students can check the answers with their partners. Suggested answers:1）sandstorm2）has lasted/been blowing3）frightening4）was blowing5）buried3Explain some words: It lasted for ten hours and

14、was very frightening. 它（沙尘暴）持续了十个小时, 而且是非常可怕的。frightening adj. causing fear; alarming 吓人的; 可怕的a frightening experience一次可怕的经历frighten vt. fill sb. with fear; make afraid使害怕; 使（人）感到恐惧The storm frightens the baby. 暴风雨使那个婴儿受惊吓。frightened adj. in a state of fear; afraid; scared感到恐惧的; 受到惊吓的He looked frig

15、htened as he spoke. 他说话时显得非常恐惧。【辨析】 frightening与frightened形容词frightening意为“令人惊吓的, 恐怖的”, 常用来说明事物。类似的形容词还有exciting, interesting, disappointing, puzzling, surprising, astonishing, shocking, moving, amusing, encouraging, boring, pleasing, inspiring, tiring, worrying等, 如:The situation is encouraging. 形势使

16、人感到鼓舞。与frightening相对应的过去分词型的形容词是frightened, 常用来修饰人。类似的形容词还有excited, interested, disappointed, puzzled, surprised, astonished, shocked, moved, amused, encouraged, bored, delighted, inspired, pleased, tired, worried等。注意:若说明或修饰的名词是face, look, smile, voice等能表现出人的情感的词, 通常用过去分词型的形容词。如:There was an excited

17、 look on his face. 他的脸上有种兴奋的表情。Her voice sounded excited. 她的声音听起来很兴奋。The girl stared at the man with frightened eyes. 这女孩以惊恐的眼神凝视那位男子。练习（1）Mr. Smith,_ of the_ speech, started to read a novel. A. tired; boring B. tiring; boredC. tired; boredD. tiring; boring（2）I was cycling in the street when I heard

18、 an old woman_ out a _ cry and then saw her bleeding badly. A. give; frighteningB. give; frightenedC. to give; frighteningD. to give; frightened（3）_ the big snake, the little girl stood under the tree,_ out of her life. A. Seen; frighteningB. Seeing; frighteningC. To see; frightenedD. Seeing; fright

19、ened答案:（1）A第一个空形容史密斯先生累了, 指人, 用过去分词。第二个空指speech“演讲”, 指物, 用现在分词表示“令人厌倦的”。（2）B第一个空是 hear sb. do sth. 结构, “听见某人做某事”, 第二个空修饰的是cry这一表现出老妇人的情感的词, 所以用frightened。实际上，此时若强调“我”的感受，选A项也可以。（3）D第一个空“看见大蛇”, “看”的逻辑主语是the little girl, 所以要用现在分词表示主动；后一个空指的是小女孩吓得掉了魂, 指人, 用过去分词。 lastv. &adj. （1）v. continue, go on“持续, 延

20、续（无被动）”, 后面常接表示一段的时间状语, 且状语前可带或不带for。The hot weather will last until September. 酷热天气将会延续到九月。The war lasted（for）5 years. 战争持续了5年。（2）v. to remain of use耐久; 耐用This kind of cloth lasts long. 这种布耐穿。（3）v. to be enough for足够The food will last for three days. 食物还能维持3天。（4）adj. the one after all the others最后的

21、He was the last person to arrive at the party. 他是最后一个到达聚会的。Saturday is the last day of a week. 星期六是一周的最后一天。（5）adj. not possible最不可能的He is the last man to tell lies. 他是最不可能说谎的人。（6）adj. past 过去的Great changes have taken place in China in the last ten years. 在过去10年里中国发生了很大变化。（7）n. things or people remai

22、ning in the end 最后的人或事物These are the last of our books. 我们就剩下这些书了。拓展at last最后the last. . . but one倒数第二的to the last直到最后last of all在最后lasting adj. 持久的, 永恒的练习It is said that the weather will_ hot for another three or four days. A. look B. last C. stay D. get答案:C天气将继续热三四天。last后面通常要加表示时间的短语。 The wind ble

23、w the sand high around the houses, and some cars were almost completely buried by the sand. 强劲的风吹得房子周围的沙尘四处飞扬, 有些小汽车几乎被沙尘所埋没。blow vt. & vi. be moving吹, 吹动, 刮。例如:The winds blow across the sea, pushing little waves into bigger and bigger ones. 风吹过海面, 把小的波浪推向前进, 变成越来越大的波浪。The wind has blown my hat off.

24、 风把我的帽子刮走了。blow n. hard stroke; sudden shock打, 打击, 奇袭, 猛攻。例如:give sb. a blow on the head给某人头上一击blow away 刮走blow down 刮倒blow over 刮倒, 吹倒blow off 吹掉blow out 吹灭4Check the answers. Option Two1Pair work. Students read the word in the box and talk about their meanings or refer to the dictionaries. 2Fill i

25、n the blanks and check with each other. 3Let some individual students read their answers and correct the mistakes. 4Explain some words: the same as Option One, 3 Step 3 Activity 2（Page 31）Check the meaning of these words. 1Read out the words and ask students to repeat them after you. Take care with

26、the stress on these two words: protect, Pacific. 2Pair students to decide on the meanings with or without dictionaries. 3Then ask students to work in pairs to decide which of the following statements is false. 1Sandstorms begin in desert areas. 2Deserts are created by climate changes. 3Deserts are a

27、lso created because people cut down trees and dig up grass. 4Sandstorms from Asia have blown across the Pacific Ocean to America. 5Sandstorms cant be prevented. 6The inland region has more sandstorms than the one near the sea. Suggested answers:The fifth is false. 4Explain some language points. Dese

28、rts are also created because people cut down trees and dig up grass. 人们把树砍了, 把草挖了, 也是沙漠的一个成因。cut down（1）to bring down by cutting 通过砍伐使减少Cutting down so many trees without planting some will make the environment worse. 砍伐掉这么多树木而不种植补充会使环境变得更坏。（2）to reduce in amount减少The doctors have advised cutting do

29、wn smoking and drinking. 医生建议少抽烟, 少喝酒。（3）to knock down or kill sb. 击倒或杀死某人The robber cut down the person and ran away in a taxi. 抢劫犯把那个人杀了然后乘出租车跑了。cut across抄近路 cut at对准（某人）猛击cut back剪枝 cut up剪成碎片cut off切断 cut out剪除练习He was in hospital for six months. He felt as if he was_ from the outside world. A.

30、 cut out B. cut offC. cut upD. cut through答案:B根据短语的意思分析, 此处指他住院六个月, 感觉好像跟外界切断了联系。cut through指“抄近路走过; 刺穿”。 If you are in a desert, what is the first sign of a sandstorm?如果你在沙漠里, 沙尘暴的第一个迹象是什么？sign n. & v. （1）n. board, notice, etc. that directs sb. towards sth. , gives a warning, advertises a business,

31、 etc. “标志牌”“符号”“动作”“手势”Havent you seen the sign “No parking”?你没有看到牌子上写着“不许停车”吗？Shaking heads is a sign of disagreement. 摇头是表示不同意的动作。（2）n. thing that shows that sb. /sth. is present or exists, or that sth. may happen“迹象”“征兆”“痕迹”Very often dark clouds are a sign of rain. 乌云常常是下雨的征兆。Scientists have found no signs of life on Mars（火星）so far. 迄今为止科学家们还