约2090字。

　　Topic 3  The world has changed for the better.
　　Section A
　　Ⅰ. Teaching aims and demands
　　1. Learn some new words and phrases:
　　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: derivations.
　　5. Talt 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
　　Ⅲ. Five-finger Teaching Plan
　　Step 1  Review
　　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? I heard he had 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 used to be 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 Beijing. Compare 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 fact
　　Great 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: They 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
　　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?