UNIT1The Developing World TOPIC3The world has changed for the better. SECTION A教案

Unit 1 The Changing World
Topic 3 The world has changed for the better.
Section A
The main activities are 1a and 3. 本课重点活动是1a和3。
Ⅰ. Teaching aims and demands 教学目标
1. Learn some new words and a phrase:
as a matter of fact, discover, direct, possible, fair, invention, excite
2. Learn some useful sentences:
(1)Oh, you will get used to it very soon if you come.
(2)You must come for a visit.
3. Learn the present perfect tense with “for” or “since”:
(1)You have been in New York for a long time.
(2)The city has improved a lot since I came here a few years ago.
4. Master word formation: derivation.
5. Talk about changes in New York:
(1)I heard the traffic there was terrible and almost everyone drove too fast.
(2)As a matter of fact, it’s a wonderful place to live.
Ⅱ. Teaching aids 教具
多媒体/几张新旧北京图片/录音机/图片/单词卡片/小黑板或幻灯片
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:10分钟)
引导学生用现在完成时谈论北京的变化，引出for和since的用法及部分短语，并导入新课。
1. (师生对话，复习含有ever, never, just等词的现在完成时。)
T: S1, have you ever been to Beijing
S1: No, I haven’t. I have never been there.
T: What about your elder brother Has he ever been there
S1: Yes, he has just come back.
T: How long has he stayed there
S1: For about two weeks. (帮助学生回答。)
(板书并适当讲解，要求学生初步掌握for在现在完成时中的用法。)
He has stayed there for about two weeks.
T: I went to Beijing in 1995. At that time, the streets there were very dirty. The houses were small and dark. As a matter of fact (In fact), great changes have already taken place since 1984. What changes have taken place Here are some pictures about old Beijing and modern pare and discuss them.
(教师边叙述边板书画线部分，并作适当讲解，要求掌握as a matter of fact和since的用法。)
as a matter of fact = in factGreat changes have already taken place since 1984.
2. (教师用多媒体或图片展示几组北京过去和现在的画面，让学生观看、讨论北京的变化，引出纽约的变化。)
T: Beijing has changed a lot. Who can describe it (教师手指过去北京城的图片。)
S1: The houses were small and the streets were narrow in the past.
T: You’re right. Who can describe this picture (教师手指现在北京城的图片。)
S2: There are lots of tall buildings in Beijing now.
S3: More ring roads.
S4: People can enjoy more sorts of leisure activities.
…
T: Well done! The changes have taken place not only in China but also in the world. Now let’s listen to the tape to know about the changes in New York.
Step 2 Presentation 第二步 呈现(时间:10分钟)
听录音，呈现1a内容，然后让学生自己观察文中含有for, since的句子，归纳for, since的用法，教师作适当讲解并要求学生掌握。
1. (学生听两遍录音后，回答教师的问题。)
T: Now, who can answer the question: How was New York’s traffic
S1: The traffic was terrible and almost everyone drove too fast.
T: You’re right. What about its streets in the past
S2: The streets were dirty.
T: Does it change now
S2: Yes. It is quite clean now.
T: Is New York a dangerous place now
S3: No, it isn’t. It was dangerous in the past.
T: Is New York a wonderful place to live now
S4: Yes, it is.
T: Good. As a matter of fact, there are beautiful parks, good schools, famous museums and excellent restaurants now. And you can go to plays, concerts and operas every day if you like. If you want to know more about New York, you must come for a visit there. Do you want to go there
Ss: Yes. Of course.
T: I hope you have chances. Now let’s read after the tape.
2. (教师播放录音，学生跟读一遍，同时找出含有for, since的句子，与前面板书的完成时的句子板书在一起。)
He has stayed there for about two weeks.You have been in New York for a long time.Great changes have already taken place since 1984.The city has improved a lot since I came here a few years ago.
3. (引导学生观察上述句子，分析for与since的区别。帮助学生总结for与since的用法并要求初步掌握。)
for+时间段 时间点since+ 从句
Step 3 Consolidation 第三步 巩固(时间:6分钟)
阅读1a，完成1b，将学生分组，要求他们根据1b内容把1a改写为一篇短文并复述，然后完成1c，巩固for, since的用法。
1. (再读1a，完成1b，并根据1b提供的信息，将学生分组，写一篇短文比较新旧纽约变化。)
T: Read 1a again. Write a short passage to compare New York nowadays with that of the past in groups.
(给学生几分钟，然后读范文。)
T: Who can read your article to us
S1: I can. New York has changed a lot. New York was dangerous in the past, but it’s quite safe now. In fact, the streets were dirty in the past, but it’s very clean now. It’s a wonderful place to live in, and the restaurants are quite excellent. You must come for a visit, and you can see New York for yourself.
2. (让学生再读1a，完成1c，并让学生试着说出since与for的用法区别。)
T: Read 1a again and finish 1c. Then I’ll ask some students to tell the differences between “since” and “for”.
Step 4 Practice 第四步 练习(时间:14分钟)
利用图片引入听力2，然后引导学生归纳总结派生构词法，并利用构词法学习本课生词。
1. (教师出示一幅洪水暴发的图片。)
T: Look! What happened in the picture You can tell me in Chinese.
Ss: 洪水暴发。
T: Yes, a flood broke out in Carly’s hometown. What should we do if we know about it
Ss: We should try our best to help her.
T: Good. Let’s listen to the story about her.
(听录音后，师生共同核对答案。)
(板书并要求学生理解。)
Flood
2. (用卡片呈现一些词汇加上前缀或后缀后的变化，引出派生构词法并学习。)
T: Boys and girls, we’ve known about changes in the world. Now let’s learn the changes between the words.
(教师事先准备两组卡片，一组上面写有单词，另一组上面写有与单词相对应的前缀或后缀，把两组卡片分别按顺序排好，组合卡片，学习派生构词法。)
Example:
T: What does this word mean (出示卡片like。)
Ss: 喜欢。
T: Right. Look at the change, please!(出示卡片dis，并与like 拼在一起。)
Ss: Dislike. It means“不喜欢”.
T: Good.
(教师用同样的方式呈现一些派生词，板书并让学生观察，师生共同总结词根加上前缀或后缀及词性的变化。)
如：
(1)否定前缀：un-, im-, dis-, in-等。happy-unhappy, polite-impolite, agree-disagree, direct-indirect(2)re-前缀表示“重复”。write-rewrite(3)动词+-er表示“人”。read-reader, write-writer(4)动词+-ion/-ment/-ness变成名词。act-action, treat-treatment, ill-illness(5)名+-y变成形容词。cloud-cloudy, sun-sunny(6)名词/动词+-ful变成形容词。care-careful, hope-hopeful(7)形容词+-ly变成副词。sad-sadly, strong-strongly
3. (根据派生构词法学习生词，板书并领读，要求学生掌握加下划线的单词。)
cover→discover direct→indirect possible→impossibleexcite→exciting fair→unfair invent→invention
(引导学生用派生法去掌握更多的词汇。)
4. (做游戏，巩固派生构词法，完成3。)
T: Some homeless people are short of food, clothes, houses, and so on. Some words are short of “hats” or “shoes”. Let’s help the words in 3 wear “hats” or “shoes”. Then the words will have some other meanings.
(这里hat意为“前缀”，shoe意为“后缀”，用穿“靴”戴“帽”的游戏完成3。)
T: You can finish it in groups. Some words have more than one hat or one pair of shoes.
For example: use—useful—useless—reuse
write—writer—rewrite—writing
Ss: The words are very interesting.
T: Yes. In this way, you can memorize many words in a short time.
(教师布置一项课后作业，激发学生兴趣。)
Step 5 Project 第五步 综合探究活动(时间:5分钟)
教师把准备好的词展示在小黑板或幻灯片上，让学生讨论，利用派生构词法，组合出新词。
1. T: If you are interested in it, let’s have a discussion and try to make the words, such as: like and dislike, comfortable and uncomfortable.
obey able hope clever beautywrite agree humor fog dangerfriendly recent ill health comfortableluck tell like possible visit polite success suggest use snowwest win your noise peacerapid happy develop labor buildhome excite change bright twentycare collect crowd enjoy
T: Finish these derivations. You can do them in groups.
2. Homework:
Please collect and sum up the words like 3 after class.
板书设计：
The world has changed for the better.Section Aas a matter of fact You have been in New York for a long time. The city has improved a lot since I came here a few years ago.Derivations:in+direct→indirect invent+tion→inventionim+possible→impossible un+fair→unfairdis+cover→discover excite+ing→exciting
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