教学目标：
1. Be able to listen and say the new sentence pattern.
2. Learn to say new words
3. Do part C.
重点难点：
1. bigger smaller
2. John is thinner than Tony and Alan.
3. Alan is taller than John but he is shorter than Tony.
教学准备：
1. Tape recorder
2. Some pictures
教学过程：
Step1. Organization of class
1. Greetings:
2. Warm-up activities:
T: Hello, boys and girls, nice to see you.
Now let’s listen and do. Run/ walk/ play/ eat/ drink/ sing/ dance… How do you feel when you sing and dance?
Ss will say the word ”happy”。
T: Don’t run/ Don’t walk/ don’t play… How do you feel when you are not allowed to do these things?
Ss will say sad or angry. T teaches the words: angry pleased
Step2. Presentation
1. T shows 2 apples: Look！ This apple is bigger and that apple is smaller. Which one do you like?
2. Ss learn to say : bigger smaller
3. T: right;. Look！ The garden is bigger and the hole is smaller. But who is taller? Let’s see.
4. T shows pictures of John, Tony , and Alan. Ss learn to say : Tony is taller than John and Alan. Alan is taller than John . John is thinner than Tony and Alan.
5. Ss make sentences with words: bigger smaller taller
6. T: big and small are antonyms. Can you give me more antonyms? moon?
7. Ss give out more antonyms and make sentences with them.
8. Ss read the sentences in Part D and do it by themselves.? What are the boy and girl talking about?
T sums up the new sentence pattern of comparative sentence.
step3: Practice:
1. Let’s play a game T: There are some antonyms in the box .Try to say a comparative sentence with them.
Ss take turns to pick out the word then say a sentence about them. Ss read and write these words.
2. Listen to the tape and read after the tape. Ss do part D by themselves.
板书设计：
bigger smaller taller
Tony is taller than John and Alan.