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标题: 仁爱版九年级英语公开课Topic 2 All these problems are very serious. Section A 教学设计 [打印本页]
作者: 网站工作室 时间: 2013-9-16 17:26
标题: 仁爱版九年级英语公开课Topic 2 All these problems are very serious. Section A 教学设计
优秀教案 The main activities are1aand 2. 本课重点活动是1a和2。
Ⅰ. Teaching aims and demands 教学目标
1. Learn a new word and some phrases:
as a result, behavior, in the beginning, day by day, die out
2. Learn some useful sentences:
(1)As a result, air pollution has become a serious problem.
(2)Humans have come to realize the importance of protecting animals.
3. Learn the indefinite pronoun and adverb:
(1) None of us likes pollution.
(2) Don’t spit anywhere in public.
(3) Everyone should care for wild animals and plant more trees.
4. Learn the importance of protecting the environment.
Ⅱ. Teaching aids 教具
有关污染的和学生不文明行为的教学图片/小黑板/录音机/警示标语
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:7分钟)
复习污染的类型及其危害，教师创设一个空气污染的情境，引入本课话题。
1. (教师收集一些有关污染的图片，让学生说出它们分别属于哪种污染，有何危害并提出解决建议。)
T: What kind of pollution is it?
Ss: It is noise pollution.
T: What harm can it cause?
S1: It can disturb others and make people feel uncomfortable and unpleasant.
S2: It does great harm to people’s hearing. It can even make people sick or deaf.
T: Good. How should we solve this problem?
S3: Don’t always listen to loud pop music.
S4: Don’t make a loud noice in public.
…
(其它污染用同样的方法复习。学生可以在教师帮助下回答。)
Step 2 Presentation 第二步 呈现(时间:10分钟)
展示1a的图片，导入新课，呈现本课生词和词组。讲解不定代词和不定副词的用法。教育学生必须保护环境。
(教师创设一个空气污染的情境，引入本课话题。例如：教师一边拍身上的灰尘，一边咳嗽着走进教室，然后描述。)
T: It is too dirty and there is too much heavy smoke outside. I can’t stand it.
1. (教师展示1a的图片，导入新课。)
T: Do you like the environment here?
Ss: No, we don’t.
T: Why?
Ss: Because there is too much smoke. It’s a serious air pollution.
T: Very good. We should stop burning coal. It is said that Chinahas become the world’s largest producer and user of coal. As a result, air pollution has become a serious problem.
作者: 网站工作室 时间: 2013-9-16 17:27
(板书并要求学生掌握。)
T: Now our government has realized the importance of protecting the environment.
(板书并要求学生理解。)
T: We should do something useful to protect the environment, too.
(板书并解释something是不定代词，其修饰语要放在它后面。);
T: Can you tell me what we should do?
S1:We shouldn’t leave rubbish here and there.
S2
on’t spit anywhere in public.
S3on’t walk on grass.
S4:…
(教师引导学生回答。)
T: Well done. We should do everything we can to protect the environment.
2. (播放1a录音，让学生带着问题去听。)
T: Listen to the tape, and answer the questions on the small blackboard.
(出示小黑板。)
(1)What’s the article about?
(2)What should we do and not do to protect the environment?
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(核对答案。)
3. (男女生分角色朗读。)
T: Let’s read1atogether. Boys—Kangkang and girls—Michael.
4. (让学生再读1a，试着找出1a中的不定代词或不定副词，以及一些疑难点。)
T: Read1aagain, and try to find theindefinite pronouns or adverbs.
Step 3 Consolidation 第三步 巩固(时间:8分钟)
阅读1a，完成1b，开展分组活动加深对文章的理解，增强学生的环保意识。
1. (让学生齐读对话，巩固1a并完成1b。)
T: Now, let’s read this dialog together again, and then try to answer the questions in 1b as quickly as you can.
(核对答案。)
2. (要求学生利用小黑板上的关键词复述1a。)
T: Retell1awith the key words. Two minutes for preparation.
a.the largest producer and user
b.a serious problem
c.do something useful
d.leave rubbish/spit anywhere/walk on grass/pick flowers/care for/plant more trees
e.do everything
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(抽查几名同学，检测复述情况。教师作点评。)
Step 4 Practice 第四步 练习(时间:15分钟)
教师利用图片作引导，呈现部分生词和词组。让学生独立完成2，然后听录音，完成3。并通过练习，分析不定代词和不定副词在句中的作用，总结它们的用法。
1. (教师展示多幅有关学生不文明现象的图片。)
T: Environment is very important to us. How about the environment ofKangkang’s school? Let’s look at the pictures.
T: (指着第一幅图中的男生。) Is he polite or impolite?
Ss: Impolite.
T: Yes. He is rude.
(板书并要求学生理解。)
2. (让学生观察图片，然后分组讨论图中人物的行为是否正确。)
T: Are their behaviors good or bad?
(板书并要求学生掌握。)
Ss: Bad.
T: Good. What should we do then?
Ss:We should make rules to change the situation. Perhaps it’s hard for us to follow the rules in the beginning. But you will get used to them later on and our school will become better and better day by day.
T: I agree with you.
(板书并要求学生掌握。)
in the beginning, day by day
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T: Discuss in groups of four, then give a report.
(小组选代表汇报。)
3. (教师让学生用不定代词或不定副词完成这封信，完成2。)
T: Here is a letter from Kangkang. Is the environment of his school good or bad? What did he say in the letter? Please read 2. Choose the proper words to fill in the blanks.
(教师与学生核对答案。让学生认真地读这封信，分析不定代词和不定副词在句中的作用。引导学生总结出不定代词/副词的用法。)
4. (教师用图片作引导，让学生对新的语法进行训练，达到学以致用的目的。)
(展示一系列有标语的图片。)
T: We know we should protect the environment. What should we do? Please use the indefinite pronouns or adverbs in your sentences.
(教师可做适当的引导。)
S1: None of us should step on the grass.
S2: Don’t throw rubbish everywhere.
S3: Nobody should pick the flowers.
S4: Don’t spit anywhere.
S5: Everyone should care for animals.
T: Excellent. We should do everything we can to protect the environment.
5. (听录音，完成3。)
T: In the past, people killed animals for their meat and skins. Now some kinds of animals are becoming fewer and fewer. And some animals are in danger of dying out completely.
(板书并要求学生掌握。)
T: Listen to the tape and finish 3.
(教师与学生核对答案，然后解释语言点。)
Step 5 Project 第五步 综合探究活动(时间:5分钟)
让学生调查周围的人，有哪些行为对保护环境是不利的，应如何解决，写一份调查报告。然后讨论作为一名中学生应该和不应该做什么，以此制定一份班级或学校规则来增强学生的环保意识。
1. T: Make a survey.
(让学生调查周围的人，有哪些不良的行为，应如何解决。)
2. Homework:
Make some class rules or school rules about protecting environment.
板书设计：
All these problems are very serious. Section A as a result But the government is doing something useful to protect the environment.
something useful None of us likes pollution.
in the beginning Don’t spit anywhere in public.
day by day Everyone should care for wild animals and plant more trees.
die out We should do everything we can to protect the environment.
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Section B
The main activity is1a. 本课重点活动是1a。
Ⅰ. Teaching aims and demands 教学目标
1. Learn some new words and phrases:
sand, cut down, change into, prevent, prevent … from, human being, although, law, turn off
2. Learn some useful sentences:
(1) Trees can stop the wind from blowing the earth away.
(2) Pass laws against water pollution.
(3) Remember to turn the tap off when you leave.
3. Continue to learn the indefinite pronoun and adverb.
4. Learn to talk about pollution and its harm.
Ⅱ. Teaching aids 教具
幻灯片/录音机/图片
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:5分钟)
通过方格游戏，来复习不定代词和不定副词的用法。
(让同桌两人做一个3×3的方格，将上节课Section A中2的10个不定代词(everyone和everybody任选其一)放入方格中。教师事先准备九道练习题，答案就是方格中的九个不定代词。教师将这些习题逐一呈现出来，同桌两人抢圈答案，谁抢到的多谁获胜。在此过程中，教师每呈现一题核对一次答案。)
(供参考)
(表格及习题如下：)
none | other | something |
everyone everybody
| nobody | anything |
everywhere | anybody | others |
(1) None of us knows how to stop the bad behavior.
(2) I knocked on the door but nobody answered.
(3) Some of these books are better than others.
(4) She was driving the car with one hand and wiping the window with the other.
(5) They are beautiful but I am looking for something useful.
(6) You can’t believe anything she says.
(7) There’re 5 000 people living here and almost everyone/everybody has his/her own car.
(8) He’s cleverer than anybody I know.
(9) I’ve looked everywhere but I can’t find it.
Step 2 Presentation 第二步 呈现(时间:15分钟)
通过多媒体呈现1c中的图片，创造情景对话，呈现新单词和词组，学习1a。
1. (呈现1c中的图片，学习新词汇。)
T: Look at Picture2 in1c.
T: (指着第二幅图。) Is the scenery beautiful?
Ss: Yes.
T: OK. Let’s look at Picture 4. Is it beautiful?
Ss: No.
T: What has happened to the forest?
Ss: It has gone.
T: Yes. People have cut down too many trees.
(板书并要求学生掌握。)
T: Please look at Picture 1. A lot of earth has been washed away. Why?
Ss: Because people have cut down …(教师引导学生回答。)
T: That’s right. Trees can prevent the water from washing the earth away.
(板书并要求学生掌握。)
T: Let’s look at Picture 3. Oh, my goodness! The forest has changed into desert.
(板书并要求学生掌握短语change into；理解desert。)
T: Please look at Picture 5. What’s the weather like?
Ss: It’s bad.
T: I agree with you. The wind is blowing strongly with lots of sand. We call it sandstorm.
(板书并要求学生掌握sand；了解sandstorm。)
T: Is cutting down trees good or bad for us?
Ss: It’s bad.
T: Very good. It’s harmful not only to human beings, but also to animals and plants.
(板书并要求学生理解。)
T: So what can we do to protect the environment? Discuss in groups of four.
(给学生两分钟，让他们讨论。)
S1: Plant more trees.
S2: Stop cutting down trees.
S3: …
T: Good idea. Although we have done a lot to protect the environment, it’s not enough yet. Let’s work harder.
(板书并要求学生掌握。)
2. (让学生小组讨论完成1c。)
T: Do you know the relations between trees, human beings and sandstorms? Do you know how sandstorms come into being? Now please look at the pictures in1cand number them.
(核对答案。)
3. (听1a录音回答问题。)
T: Just now we talked about how sandstorms come into being. Now listen to1a, and answer the questions on the blackboard.
(板书)
(1) What’s the weather like today?
(2) What should we do to protect the environment?
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(核对答案。)
4. (让学生分成小组，读1a，提出不懂之处。小组内讨论，解决各自提出的问题；最后全班共同讨论，解决遗留问题。用此方式可以让学生充分参与到教学过程中来，进行自主探究学习，教师做补充讲解。)
T: OK, please work in groups. Find and talk about the language points and difficult points, then I’ll ask some students to give their answers to the class.
Step 3 Consolidation 第三步 巩固(时间:8分钟)
教师放1a录音，学生表演朗读，完成1b。让学生明白树木在环境保护中的重要性，增强环保意识。
1. (让学生跟读1a录音，并注意语音语调。)
T: Now, please read after the tape. Pay attention to the pronunciation and intonation.
2. (让学生三人一组表演这个对话，稍后检查活动成果。)
T: Please work in groups of three. After a while, I’ll ask several groups to act out this dialog.
G1: …
G2: …
3. (让学生看1b的图片，完成1b。)
T: Let’s look at the picture in 1b. Make notes of trees’ functions according to1aby yourselves.
(学生完成后，让学生一个接一个地把答案读出来。)
T: Please read your notes one by one.
S1: …
Step 4 Practice 第四步 练习(时间:10分钟)
教师展示一幅水被污染的图片，呈现2中的新词汇。让学生懂得怎样保护和节约水资源。
1. T: Now we know that a lot of water can be saved by forests. Why should we save water?
Ss: Because it is very important.
T: That’s right. We can’t live without water. So we should protect water.
(展示一条被工厂污染的河的图片，引出2中的新词汇。)
T: Look at the picture. Can people drink the water in the river?
Ss: No.
T: Why?
Ss: Because the water is too dirty.
T: What causes it?
Ss: Factories are pouring waste water into the river.
T: Good. What can we do to stop it?
S1: Pull down the factories.
S2: Write to the newspaper or the government.
S3: …
T: Very good. We can stop factories pouring waste water into rivers by cutting off their water supply. And we can also pass laws against it.
(板书并要求学生掌握。)
T: Do you know some other ways of protecting and saving water? For example, remember to turn the tap off when you leave.
(板书turn off，要求学生掌握；板书tap，要求学生理解。)
2. T: Now, read 2 and discuss in groups of four.
(小组代表报告，教师板书总结。)
Step 5 Project 第五步 综合探究活动(时间:7分钟)
综合运用本课的语言项目，探讨水资源保护的相关问题；课后写一篇有关“保护和节约水资源”的短文，进一步增强学生的环保意识。
1. (让学生讨论如下问题，为写作做准备。)
T: OK. We know water is very important to human beings. Now please talk about the following questions:
(1)Why should we save water?
(2)What’s the importance of water?
(3) How should we save water?
(讨论完后汇报结果。教师将关键词板书，以利于学生写作。)
2. Homework:
(1) Find out more information about water.
(2) Write a short passage with the title “Protecting and Saving Water”.
板书设计：
All these problems are very serious. Section B cut down
prevent … from …=stop … from …
change into desert
human being Trees can stop the wind from blowing the earth away.
although …/ … but … Pass laws against water pollution.
turn off Remember to turn the tap off when you leave.
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作者: 网站工作室 时间: 2013-9-16 17:27
Section C
The main activity is1a. 本课重点活动是1a。
Ⅰ. Teaching aims and demands 教学目标
1. Learn some new words and phrases:
on earth, period, millions of, take away, rise, level, refer to
2. Learn some useful sentences:
(1) When it rains or when the wind blows, the earth is taken away.
(2) The heat from the sun can’t escape so thetemperature is rising.
3. Learn to talk about the harm of pollution:
(1) Forests have become deserts, so more and more sorts of animals and plants are disappearing.
(2) As a result, many rivers and lakes are now dead.
(3) Too much harmful radiation from the sun passes through the hole and reaches the earth directly.
(4) It causes the level of the oceans to rise and the climate of the earth to change.
4. Develop the students’ sense of environmental protection.
Ⅱ. Teaching aids 教具
图片/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:4分钟)
通过检查作业，引导学生开拓思维，提出保护环境和水资源的具体措施，复习不定代词和副词。为学习新词汇作准备。
(检查作业，并找学生汇报结果，引导学生如何保护水资源。)
T: How do you protect our environment and save water?
S1: Everyone should plant more trees.
S2: We should do everything we can to save water.
S3: Everybody should know the importance of forests.
S4: Pass laws against water pollution.
S5:Collect andreuse waste water.
…
Step 2 Presentation 第二步 呈现(时间:18分钟)
教师通过日常对话，借助1a中的图片，创设情景，导入新课，呈现新的词汇。
1. (教师由日常对话，引出本课话题，呈现部分新词汇。)
T: What’s the weather like today?
Ss: It’s …
T: As we know,Beijingoften has sandstorms in spring. What causes the bad weather?
Ss: Cutting down too many trees.
(展示1a第二幅图画。)
T: Yes. All over the world, people have cut down millions of trees. And trees become fewer and fewer.
(板书并要求学生掌握。)
T: Cutting down too many trees causes the bad weather. How can trees affect the weather?
S1: They can keep water from running away.
S2: They can stop …
S3: …
T: Yes. Trees can stop the wind and water from taking the earth away.
(板书并要求学生掌握。)
T: Anything else?
Ss: (允许学生用汉语回答。)树能吸收二氧化碳并释放氧气。
T: That’s right. Trees can breathe in carbon dioxide and breathe out oxygen.
(板书并要求学生理解。)
carbon dioxide: CO2
oxygen: O2
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T: Where does CO2 come from?
S4: Animals’breathing.
S5: Burning oil. For example, cars and buses.
T: Yes. They have polluted the air. Carbon dioxide in the air has increased a lot. This has formed a “blanket” around the earth.
(展示1a第五幅图。)Please look at the picture.
(板书并要求学生理解。)
T: The heat from the sun can’t escape, so the temperature is rising.
(板书并要求学生掌握rise；理解escape。)
T: This is called “the greenhouse effect”.
(板书并要求学生理解。)
T: Because of the greenhouse effect, what happens to the icebergs(冰川)?
Ss: Some parts of them change into water.
T: So it causes the level of the oceans to rise.
(板书并要求学生掌握。)
T: (展示1a第4幅图。)Please look at this picture. Around the earth, there’s a special kind of oxygen called “ozone”.
(板书并要求学生理解。)
T: But now air pollution is destroying it and that has made a very big hole in the ozone layer.
(板书并要求学生理解。)
T: Too much harmful radiation from the sun passes through the hole and reaches the earth.
(板书并要求学生理解。)
2. (让学生快速阅读1a，用所给的词组填空。完成1a。)
T: We humans have lived on earth for only 35 000 years, but during this period we have changed our planet a lot in many ways. Now read the passage and then choose a suitable title for each paragraph.
(板书并要求学生掌握。)
(学生完成后与教师核对答案。)
3. (教师出示小黑板上的问题，让学生再读一遍课文后回答。)
(1) Have we changed our planet in many ways?
(2) Have people done good to the earth?
(3) Why are more and more sorts of animals and plants disappearing?
(4) Are many rivers and lakes dead now?
(5) Is ozone important to the earth? Why?
(6) Has carbon dioxide in the air increased a lot?
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(让个别学生回答，完成小黑板上的问题。)
Step 3 Consolidation 第三步 巩固(时间:8分钟)
让学生再次读1a，完成1b，巩固本课的语言点，培养学生的阅读能力。
1. (让学生再次读课文，完成1b。)
T: Read the passage again. Finish 1b alone.
(板书并让学生猜测Mars和refer to的汉语意思。掌握refer to；了解Mars。)
(学生完成后，师生核对答案。)
2. (放录音，学生跟读课文。)
T: Now follow the tape to read the passage.
3. (教师让学生讨论并找出新的或不懂的语言点，培养学生的自主学习能力。教师解释学生仍有疑惑的知识点并板书。)
4. (让学生两人一组讨论，完成下面的表格。)
T: How many kinds of pollution are mentioned in the passage? How do they affect our environment? According to1a, finish the form on the blackboard.
(板书)
Step 4 Practice 第四步 练习(时间:10分钟)
使学生了解各种污染对地球环境的影响，培养他们的环保意识。
1. (让学生分组讨论，看哪组最快说出O3，CO2和温室效应的含义及其对环境的影响，并以此写一篇短文，完成2。)
T: Please read the passage again, discuss the meanings of the following expressions in2 ingroups of 4, and then write down how they affect the environment.
(学生讨论后，与教师核对答案。)
2. (根据给出的提示词写一篇小短文，可先口述。)
T: Write a short passage with the key words given.
(板书关键词。)
(1)change…in many ways
(2)important, destroy, too much, harmful radiation, cause cancer
(3)increase a lot, blanket, rise, change
(4)serious, do something
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Step 5 Project 第五步 综合探究活动(时间:5分钟)
让学生讨论各种危害地球的污染方式，并就有关污染写一篇短文，培养学生综合运用语言的能力，增强学生的环保意识。
1. (到目前为止，污染危害地球的方式已基本介绍完毕，可以让学生做专题讨论，以培养他们的综合语言运用能力。在此过程中，鼓励学生大胆发挥，做最大程度的拓展性讨论。最后通过汇报，教师检验活动成果。)
T: OK, until now, we have learned so many kinds of pollution. Now please work in groups and discuss them. After a moment, I’ll ask some students to report it.
2. Homework:
Write an article about the pollution.
板书设计：
All these problems are very serious. Section C millions of … When it rains or when the wind blows, the earth is taken away.
take away As a result, many rivers and lakes are now dead.
refer to The heat from the sun can’t escape so the temperature is rising.
It causes the level of the oceans to rise and the climate of the earth to change.
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Section D
The main activities are1a和4. 本课重点活动是1a和4。
Ⅰ. Teaching aims and demands 教学目标
1. Learn a new phrase:
take up
2. Learn some useful sentences:
(1) This harms the environment …
(2) At the same time, dealing with …
(3) Of all the garbage, about 35 percent can be recycled while the rest can’t.
(4) How shall we deal with it?
3. Review the indefinite pronoun and adverb:
(1) None of us likes pollution.
(2) Don’t spit anywhere in public.
(3) Everyone should care for wild animals and plant more trees.
(4) We should do everything we can to protect the environment.
4. Talk about the harm of rubbish.
5. Go on developing the students’ sense of environmental protection.
Ⅱ. Teaching aids 教具
图片/录音机/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:5分钟)
师生对话，复习Section C的内容，为学习新词汇作准备。
1. (复习讨论Section C的综合探究活动，教师作总结。)
2. (教师通过复习上一课的内容为学习新词汇做准备。)
T: After learning Section C, we have known that many kinds of pollution affect our environment. How do factories affect our environment?
S1: They / Factories have polluted the land and the water.
S2: Factories make some rivers and lakes dead now.
S3: …
T: Very good. How do cars and buses affect our environment?
S4: They have polluted the air.
S5: They have caused noise pollution.
S6: …
T: How does cutting down too many trees affect our environment?
S7: Some forests have changed into deserts.
S8: More and more different sorts of animals and plants are disappearing.
S9: When it rains or when the wind blows, the earth is taken away.
Step 2 Presentation 第二步 呈现(时间:16分钟)
呈现1a，完成1b。培养学生的听说技能。
1. (教师展示有关垃圾的图片，导入1a，呈现新词汇。)
T: OK. Now let’s talk about another serious problem.
(教师展示1a中的图片。)
T: What’s in the picture?
Ss: Waste./Rubbish.
T: How do people deal with the waste?
Ss: Put it into the land.
T: So the waste takes up a lot of land and it does great harm to our environment.
(板书并要求学生掌握。)
T: In fact, some of the rubbish can be recycled.
(板书并要求学生理解。)
T: Every day, we produce lots of rubbish. Please listen to the tape and fill in the blanks in1a. Let’s learn about what trouble the waste brings us.
(学生听录音，完成1a。师生共同核对答案。)
2. (让学生再读1a，回答小黑板上的问题。)
T: Please read1aagain and find out the answers to the questions on the small blackboard.
(出示小黑板。)
(1) How much waste is put into the land inBritain?
(2) Is it easy to find new land to put rubbish in?
(3) Can all of the rubbish be recycled?
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(核对答案。)
3. (让学生依据1a完成1b。)
T: Well done! Now let’s read1aagain and underline the sentences with the same meanings as the ones in 1b, then finish 1b.
(核对答案。)
Step 3 Consolidation 第三步 巩固(时间:8分钟)
教师和学生一起归纳短文中的语言点，然后让学生据此写一个如何处理垃圾的小短文。培养学生综合运用语言的能力。
1. (让学生跟读1a录音，并注意语音语调。)
T: Please read the passage after the tape, and pay attention to the pronunciation and intonation.
2. (教师和学生一起归纳短文中的语言点并板书。)
T: Let’s look at the important points in1atogether.
3. (让学生讨论平时是如何处理垃圾的，并写一个与此内容有关的小短文，完成后展示成果。)
T: Please discuss this problem: How shall we deal with the garbage?
(板书并要求学生理解。)
How shall we deal with the garbage?
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Example:
We produce garbage every day. Some people often throw it in the river or put it into the land … …
Step 4 Practice 第四步 练习(时间:10分钟)
以练习的形式复习不定代词和不定副词的用法，以及本话题的功能用语。完成2a，2b和3。
1. (复习不定代词/副词。)
T: We know, pollution is a serious problem. What should we do to protect the environment?
Here are some sentences about protecting the environment. Please complete them with the
words in the box.
no one, nobody, none, everyone, everything, something, anything, everywhere
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1. _____ should plant more trees.
2. We shouldn’t throw litter ______.
3. We can’t do ______ to harm our environment.
4. ______ of us likes water pollution.
5. They want to make ______ clean.
6. ______ can smoke here.
7. We should do ______ to protect our environment.
8. _____ likes air pollution.
(教师与学生核对答案，让学生齐读以上句子，复习巩固不定代词/副词的用法。)
2. (教师放录音，学生跟读2a中的句子。)
T: Listen to the tape and repeat it. Please pay attention to the indefinite pronoun and adverb.
3. (教师放录音，让学生跟读2b中的句子，找出这些句中的语言点并造句。)
T: Let’s listen to the tape and repeat it.
(学生读2b中的句子。)
T: Now, please make sentences with the language points in 2b.
Examples:
S1: Trees can stop the water from running away.
S2: We have come to realize that water is important to us.
…
4. (听3录音，完成3。)
Step 5 Project 第五步 综合探究活动(时间:6分钟)
把学生分为四组，让各组分别充当水，树，土地，空气，用英语叙述各自的优点及所面临的问题和自己的愿望。每组讨论后，做成海报。让学生意识到环境保护的重要性。
1. (把学生分成四组，即水小组，树小组，土小组和空气小组。)
T: Let’s do an activity in groups. Each group should have six students.
Group 1, you are Water Group.
Group 2, you are Tree Group.
Group 3, you are Soil Group.
Group 4, you are Air Group.
2. (让学生讨论自己小组的优点，面临的问题和愿望，然后在全班做个报告。完成4。)
T: Each group should discuss your own usefulness and the problems that you face and your wishes, then please give a report like the example in 4.
(学生讨论完毕后，师生一起分享活动成果——报告。)
3. Homework:
(根据活动的成果制作海报。)
T: Please make your posters with your results, and share it with your classmates.
板书设计：
All these problems are very serious. Section D take up This harms the environment …
At the same time, dealing with…
不定代词/副词 Of all the garbage, about 35 percent can be recycled while the rest can’t.
How shall we deal with it?
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