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Focus of the lesson and predicted area of difficulty 教学重点和难点
教学重点：能熟练运用句型：What does the sign mean? It means you can’t …(Don’t 动ing)。
教学难点：能准备读出字母ir在单词中的发音。
Teaching procedures 教学过程
Step 1 Warm-up
1. Greeting
2. Revision
T: Bobby knows signs are very important in our life.So he wants to do two things.
【设计意图：借助复习Cartoon time的趣味性，营造轻松自然的英语学习氛围，通过Bobby 总结性的话为下面的学习做铺垫。】
3. T:Bobby wants to do two things. One is to remind someone who did something wrong. The other is to make a video. Can you help him?
Task1: Show the photos and Say something.
Task2: Four students in a group and write and make some signs
【设计意图：通过读写的练习，使学生复习并巩固前两个课时所学的重点单词和句型。】
Step 2 Presentation
Culture time
T: So we should more attentations to our behavior in public places,such as Shopping center, Park, metro and so on.
There is a riddle for you. It looks like a train but it runs underground. What is it? Can you guess?
T: You are right. In the UK, people call the metro “underground”. In the USA, people call the metro “subway”. (PPT呈现其他单词在英美英语中的不同拼法)
【设计意图：有交通工具自然过渡到英美国家对地铁不同的说法，拓展学生视野。】
Sound time
T: Bobby is very happy after doing these things.This girl is very happy too.
1. Look, listen and fill in the blanks. (呈现公园里女孩和鸟的图片)
T: There’s a girl under the big tree. In the tree, there’s a bird. What did they say?
(学生听录音后，教师引导学生将小诗补充完整)
2. Role play (pair work)
(学生两人一组，分角色朗读小诗)
3. Read the words after the teacher. (教师带读例词)
【设计意图：通过分角色朗读及跟读，让学生初步对字母组合ir的发音形成初步的印象。】
4. Brainstorming
(1) 以头脑风暴形式鼓励学生说出更多含有ir的单词，教师带读。