师出示另一副图片，说明是蝴蝶小的时候，并问学生小时候的蝴蝶是什么样的。（对学生有所提示，说出It wasn't beautiful then。）

3.学习新单词。

wasn't=was not weren't=were not clean-----dirty

Step 3 New test(课文新授)

1. 出示图片，根据图片说句子。

2. 听第一遍录音，找出新单词。

3. 听第二遍录音，小组合作，翻译出课文的汉语意思。

4. 听第三遍录音，跟读课文并小组合作学习，读熟课文。

Step4 Practice

1. Read and circle. (Activity 3)

2. Fill in the blanks.

3. Talk about yourself.

Step 3 Summary

What did you learn?

Step 5 Homework

1. Read the text.

2. Describe the old pictures to your parents and your friends after school.

Blackboard writing:

Unit2 They were young.

New words: wasn't=was not weren't=were not

clean-----dirty

New sentences: They weren't old then.

They were young.

She wasn't tall then.

She was short.

It wasn't clean then.

It was dirty.