2. (听录音跟读，记下关键词。)

　 T: Well done. Now listen to the tape and follow. Write down the key words.

(板书)

(2分钟后挑选学生复述。)

1. (利用实物，引出生词及词组，引入2。)

T: (拿出气球) What’s this object?

(板书)

S₁: It’s a balloon. (帮助学生回答)

(板书)

T: Yes, it’s a balloon. Are there UFOs? Nobody is sure. In fact, people often mistake balloons for UFOs.

(板书)

T:　　　　 But why are there so much information about UFOs? There is a passage about it. Let’s go and have a look together.

T:　 Now please read the passage in 2 and check the best title of the passage.

(理解man-made，核对答案。)

T:　 OK, now are you sure there are UFOs? S₂, please.

S₂: No, I’m not sure there are UFOs.

T:　 Why do you think so?

S₂: Because until now, nobody seems to have really seen a UFO.

…

3. (用给出的句子编对话，完成1c。)

　 T: 　　　 From 1a we know the scientists aren’t sure whether there are UFOs. But I’m sure there are robots. Are you sure, S₁?

　 S₁: I’m quite sure.

　 T:　 I’m sure robots will make humans lose their jobs.

　 S₂: I’m not sure whether robots will make humans lose their jobs.

　 T:　 Look at the example in 1c. Can you make similar dialogs by using the sentences in the box?

　 (2分钟后，挑几组学生表演。)　

Step 4　 Practice 第四步 　练习(时间:12分钟)

2. (根据1b表格。四人一组练习1a对话。)

　 T: Please practice the dialog using the information in 1b. Then I’ll let some of you act it out.

　 (练习2分钟后，让几组学生在全班学生面前表演。)

1. (再次播放录音1a，让学生跟读，注意语音语调。)

　 T: Listen to the tape and follow. Pay attention to the pronunciation and intonation.

1.(设置听力任务，播放1a录音。)

　T: Most of us are not sure whether there are UFOs. But Jane saw a UFO yesterday. Is there 　　　 really a UFO? They’re talking about it. Now listen to 1a and answer the following question:

　　 　　　 What was Jane doing while a UFO flew over her head?

　 (听后找学生回答。)

　 S₁: She was walking toward the bus stop.(帮助学生说toward。)

　 (板书并解释。)

3. (教师从报纸、杂志、网上找一些UFO的图片，导入新课。)

　 T: (出示图片)You have known much about robots and UFOs. I have some pictures here. Look at these pictures. What are these?

　 Ss:They are UFOs.

　 (板书)

　 T:　 What do the UFOs look like?

　 Ss:They look like plates.

　 (板书)

　 T: I’m not sure whether there are UFOs. Are you sure there are UFOs, S₃?

　 (板书并帮助学生理解表达不确定的句式。)

　 S₃:Yes, I’m quite sure.

　 T: What about you, S₄?

　 S₄:I’m not sure whether there are UFOs.

　 T: I’m not sure, either. Because there are no living things on other planets.

　 (板书)

　 T: The earth is a planet. Mars(火星) is a planet, too.

Step 2　 Presentation 第二步 　呈现(时间:8分钟)

2. (检查作业：汇报搜集到的有关机器人和不明飞行物的信息。师生对话，引出生词，导入新课。)

T: I’m sure you were searching for the information about robots and UFOs last night. Please give a report about it.

　Step 1　 Review 第一步　 复习(时间:12分钟)

1. (猜谜游戏：复习过去进行时和肯定与不肯定句式的用法。)

　 (把学生分成三人一组，一人在纸上写一个动作，让另外两位同学猜他在做什么，猜时要用上I’m sure./I’m quite sure./I’m not sure.练习之后，以小组为单位在台前表演。)

(教师找两位学生帮忙，做出示范。S₁写出动作。)

　 T: What was S₁ doing at this time yesterday?

　 S₂:She was watching TV.

　 T: Are you sure?

　 S₂:Yes, I’m quite sure.

　 S₁:Yes, I was watching TV at that time.

　 (小组练习完之后，找几组学生表演。)