Unit2 Topic2 SectionA （趣味课堂课件）英语仁爱科普版九年级上册

nullnullnullnull 九上Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section A I、Master the new words and phrases： sand, although, sandstorm, desert, human being, reduce, completely, change into, stop … from, blow/ wash … away, as a result... II、Be able to decribe the process of sandstorm formation according to the pictures and some information. III、Know about the cause and process of sandstorm formation, then focus on global environmental issues. Learning aims: Review Noise is a kind of _________ (pollute). Cars and machines produce too much noise. It makes people feel _____________ (comfortable) and ____________ (pleasant). It also does great ______ (harm) to people’s _________ (hear). Noise is very _________ (harm) to human’s ________ (healthy). pollution uncomfortable unpleasant harm hearing harmful health Fill in the blanks with the correct form of each word. Pre-listening Warm up Do you know the importance of trees to the environment? In this vedio, we know about the importance of trees to the environment by different attitudes(态度) towards cutting tress between Uruk(乌鲁克) and Aruradhapura(阿鲁拉达普拉). Which functions do you know trees have? New words &expressions Roots help prevent floods. The leaves can purify(/'pjuərɪfaɪ/ v. 净化) the air. Trees affect our mental health as well. What kind of weather is it? sandstorm Do you know how sandstorms come into being? 你知道沙尘暴是怎么形成的吗？ rainstorm snowstorm It’s a kind of storm caused by sand. /'sændstɔ:m/ n. 沙暴 /sænd/ n. 沙 Long ago, there were lots of trees and forests. But human beings needed some wood to build houses and do other things, so they cut down the trees day by day. cut down many trees human being n. 人 /'bi:ɪŋ/ cut down 砍倒 day by day 一天又一天地 forests gone wash the earth away The rain washed the earth away.The forests have gone. wash... away 把.....洗掉 A lot of rich land has changed into desert because people have cut down too many trees. change into desert 转换成，变成 /dɪ'zət/ n. 沙漠 /dɪ'zɜ:t/ v. 舍弃，遗弃 sandstorms As a result, the sandstorms come into being. as a result 结果/所以 come into being 形成 Although there were sandstorms before, now the government has built “The Green Great Wall” to reduce air pollution. I hope our environment problem will be solved completely. /ɔ:l'ðəʊ/ conj. 虽然，尽管，即使 /rɪ'dju:s/ v. 减少；减轻 /kəm'pli:tli/ adv. 彻底地；完整地 3 给沙尘暴的形成过程排序 Do you know how sandstorms come into being? wash the earth away many trees change into desert ( ) ( ) ( ) ( ) ( ) ( ) 6 2 forests gone sandstorms come into being cut down trees 4 1 5 3 While-listening Kangkang, Maria and Jane are talking in a room. What are they talking about ? Listen to 1a and choose the best answer. 1b The boy and girls are talking about __________. different types of sandstorms the reasons for sandstorms sandstorms in different cities B Listen to 1a and fill in the table. 1. What is the weather like? It’s _____.The wind is blowing strongly. 2. What causes these sandstorms? People have____ _____ too many trees. 3. How can trees affect the weather? (1) Trees can ______ the wind_______ blowing the earth away. (2) A lot of water can ____ ________by forests. (3) Trees can prevent the water from _________ the earth ______. bad cut down stop from be saved washing away Read 1a and complete trees’ functions. 1c Tree’s functions A. Trees can stop the wind from blowing the earth away. B. lot of water can be saved by forests. C. They can also stop the water from washing the earth away. Listen, look and say. 提示：点击文本框可听录音。 1a What a strong wind! (Kangkang, Maria and Jane are talking in a room. The wind outside is blowing strongly.) Yes. But it’s better than the last few years. There were sandstorms before. While I was walking down the street, I couldn’t see anything. The sand really hurt my face. Why was the weather so bad? People cut down too many trees. As a result, a lot of rich land changed into desert. Trees can stop the wind from blowing the earth away. 提示：点击文本框可听录音。 And a lot of water can be saved by forests. Trees can also stop the water from washing the earth away. Cutting down trees affects the weather so much. Yes. It is harmful to human beings, animals and plants. Although there were sandstorms before, now we have built “The Green Great Wall”. Our environment has become much better. Watch and follow 4 A. Listen to the passage and circle the phrases you hear. become weaker destroy the environment disappear rapidly on the earth enough bamboo to eat 4 B. Listen again and fill in the blanks. 1. Now some kinds of animals are becoming ______ ______ _______. 2. Some animals are_____ ______ ____dying out completely. 3. In the past, pandas lived a quiet life and had ________ ______food. 4. Humans have _____ _____ ______________ the importance of protecting animals. 5. We should ____ ____ ______ to protect them. do our best in danger of plenty of come to understand fewer and fewer Post-listening 2 Complete the sentences with the correct forms of the given phrases in the box. as a result, change into, do something, stop…from, blow…away 1. People have cut down such a large number of trees that the land _________________desert. 2. There are fewer trees left, so the wind always _______the earth ________. 3. Air pollution has become a serious problem, so we must______________ to reduce it. 4. we should try our best to ______ people ______ cutting down the trees. 5. In the future, human beings can protect the trees well. _____________, animals will live a happy life in the forest. has changed into blows away do something stop from As a result 1. 猛烈地吹 _________________ 2. 转换成，变成 ___________________ 3. 阻止某人做某事 _____________________________________________ 4. 对......有影响 __________________ 5. 把......洗掉 ________________ 6. 吹走某物 ____________________________ (take sth. away 拿走某物) 7. 结果 ______________ 8. 形成 __________________ 9. 灭绝 ___________ Find the phrases. blow strongly change/turn into stop/prevent sb. (from) doing sth. = keep sb. from doing sth. have an effect on wash...away blow (blew, blown) sth. away as a result come into being die out Key points 1. While I was walking down the street just now, I couldn’t see anything. (1) when 表示 “当......时候” + 延续性v./短暂性v. while 表示 “当......时候” 只能 + 延续性v. eg. We were watching TV __________ the light went out. ____________ we were watching TV, the light went out. (2) while 有“尽管”之意 = although/though, 放在句首。 eg. _____________ she is a top student, she has some shortcoming. (3) while “然而”，表对比。 eg. He is tall and thin _________ I am short and heavy. when When/While While/Though/Although while 闯关练习 (用when, while填空） 1. ____________ Margo was talking on the phone, her sister walked in. 2. Cindy was wearing a pink shirt __________ I saw him. 3. _________ the work is difficult, it was interesting. 4. Jenny is good at Chinese ________ Sam is good at English. When/While when While while 2. A lot of rich land has changed into desert. change... into = turn... into 把......变成...... eg. She is waiting for the traffic lights to __________ green.. 3. Trees can stop the wind from blowing the earth away. stop sb. (from) doing sth. 阻止某人做某事 = prevent sb. (from) doing sth. = keep sb. from doing sth. (keep sb. doing sth. 让某人一直做某事) eg. The heavy rain has prevented us from _______ (go) there. The heavy rain _________ (stop) taxi drivers from ________(drive) too fast and carelessly last night. change into /turn into going stopped driving Key points Key points 4. Cutting down trees is harmful to human beings, animals and plants. cutting down trees是________词短语在句子中作______语，谓语用______数。 闯关练习：1)散步是我的爱好。 Walking ______(be) my hobby. 2)打乒乓球很有意思。 Playing ping-pong ____(be) great fun. 3)阅读使人完美。 Reading _______(make) a man perfect. cut down “砍倒” 代词放中间（代中原则） eg. Trees are useful to us. We shouldn’t __________. A. cut down them B. cut down it C. cut it down D. cut them down In the past, people _____________. A. cut down trees B. cut trees down 动名 主 单 is makes is D A/B 5. Although we have built “The Great Green Wall”, we still need to work hard to protect the environment. although 是 _____ 词，有“虽然，尽管”和“不过，然而”两层意思，引导_______状语从句，可以和 ________ 互换，although 较正式，__________ 更为口语化，使用更普遍些。 注意：although 引导的从句不能与but, however同时连用，但常与yet, still 连用。 闯关练习： 1.虽然他老了，但是他仍然继续努力工作。 _________________ he_____ old, he still continues working hard. 2.当时我觉得她错了,不过我什么也没说。 ________________ I ________ she was wrong at that time, I said _______. Key points 连 让步 though though Although/Though is Although/Though thought nothing Key points 6. People have cut down such a large number of trees that the land has changed into desert. a number of “许多”(修饰主语，谓语当做复数） the number of “......的数量” (作主语，谓语用单数） 用what’s 来提问，用large/small来修饰。 eg. A number of students __________ (have) the same problem. The number of the students in our school ______ (be) over 3,000. 闯关练习： 1. ______ wild animals around is becoming smaller and smaller. A. The number of B. A number of C. The numbers of D. Number of 2. — _____ the number os the books in our library? —Over 5,000 copies. A. How many is B. What are B. How much is D. What is 3. A number of students ______________ (plant) trees in the hill now. have is A D are planting Key points 7. Some animals are in danger of dying out. die out 意为“灭绝、灭亡、逐渐消失” 拓展： die off 意为“相继死去” die from 意为“因（受伤、意外事故等外部原因）而死亡” die off 意为“因（疾病、饥饿、情感等内部原因）而死亡” die away 意为“（声音等）逐渐减弱” dying 意为“要死了的、濒临死亡的”是现在分词。 闯关练习： 1. Now many wild plants and animals are in danger of __________. 2. The noise of the car __________in the distance. 3.The family members_________the war. 4. 一条死了的狗 ________________ 5. 一条濒临死亡的狗 _______________ dying out died away from a dead dog a dying dog Exercises I.用所给词汇的适当形式或根据汉语提示填空。 1. The name of the cute __________ is Teddy. It was ________ in 1903 in the USA. (bear) 2. Some wild animals are _________ out because of the environmental pollution. I hope the ________ of them can rouse people. (die) 3. Be _________ when taking _______ of the little baby. (care) 4. The Beijing roast duck in this restaurant smells __________ and sells ________. (good) 5. Some __________ animals such as snakes are also in _________. (danger) 6. I have forgotten the name of the movie ___________ (完全地) . bear born dying death careful care good well dangerous danger completely II.按要求完成句子。 1. My little sister cut a piece of birthday cake for us all.（改为否定句） My little sister ________ ______ a piece of birthday cake for us all. 2. I couldn’t see anything because of the strong wind. （对画线部分提问） ______ _______ you see anything? 3. They have cut down too many trees in recent years. （对画线部分提问） _______ have they _______ in recent years? 4. A lot of questions came up at the meeting.（改为同义句） A _______ _______ questions came up at the meeting. 5. 昨天这场大雨阻止了许多学生按时到校。（完成译句） The heavy rain _________ many students _______ getting to school on time yesterday. Exercises didn’t cut Why couldn’t What done number of prevented /stop from Summary We learn: 1. Some words: sand, although, sandstorm, desert, human being, reduce, completely... 2. Some phrases: change into, stop … from, blow/ wash … away, as a result… 3. Some sentences: As a result, a lot of rich land changed into desert. A lot of water can be saved by forests. Trees can also stop the water from washing the earth away. We can: 1. Use the indefinite pronoun and adverb. 2. Talk about the sandstorm and its harm. Homework 1. Learn the new words and phrases by heart. 2. Recite the dialog in 1a. 3. Finish Section A in the workbook. 4. Preview Section B. Thank you! Lavf58.46.101 null 176179.17 null 61308.188 67551.43 57233.297 56763.117 null 122466.18 $$nullnull