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教学重点：能正确地理解并朗读对话内容，在教师的引导和帮助下复述课文内容。
教学难点：能初步用句型What does it mean?
It means …. （No littering/parking/smoking/… ）You can /can’t….
Teaching aids
图片、词汇卡、多媒体
Teaching procedures
Step 1. Warming up
Free talk.
2. Play a game
T: Boys and girls, let’s play a game, OK?
If you see a picture or a word, do the action and read it. If you see this, shout ‘no,no,no'!
Step 2. Presentation
1. What does it mean ? It means …. Guess and match them.
2. T: Boys and girls, we can see many signs around us. Please think, where can you see signs?
S: I can see signs in a library/ cinema/ bus…
3. T: Do you go to the shopping centre?
Ss: Yes.
T: Look, where are they going?
（课件上显示Mike、Helen和Tim去购物中心的图片）
S: They are going to the shopping centre.（教授shopping centre）
T: What can you see in the shopping centre?
S: ……
T: They can see some public signs.(教授public signs)
4. Watch and answer.
T: What signs do they see?
S: Where do they see the signs?
5. Watch and match.
T: What signs do they see?（课件上逐张显示No eating or drinking, No littering, No parking, No smoking，Danger, Wet floor的图片，让学生选择）
6. Listen and order.
结合书本P50Look and write，与学生一同讨论文中的四个公共标志。