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Present some pictures and lead in the topic of this unit.
Step 2 Listen and answer
Listen to the conversation between Eddie and Hobo and answer the following questions:
1. Where was Hobo’s food an hour ago?
2. Who has just eaten Hobo’s food?
3. What does Hobo think of Eddie?
Step 3 Read and act
Read and act the conversation.
Step 4 Explanation
Explain the language points in the conversation:
1. Have you seen my food
解析：此句用的是现在完成时的一般疑问句。现在完成时由“have/has + 动词过去分词形式”构成。现在完成时态主要在以下两种情形下使用:（1）表示过去开始并持续到现在的动作或状态；（2）表示过去已完成对现在有一定影响的动作。
否定形式为：主语 + haven’t /hasn’t + 过去分词
疑问形式：Have/ Has + 主语 + 过去分词 …？
肯、否定回答：Yes, 代词 + have/has.
No, 代词 + haven’t/ hasn’t.
e.g.
I’ve just eaten it. 我刚吃了它。
You’ve changed. 你变了。
She has lived here for ten years. 她在这住10年了。
— Have you finished your homework 你完成家庭作业了吗？
— No, I haven’t.? 不，没有完成。
★ haven’t = have not hasn’t = has not
I’ve = I have You’ve = You have
2. 本课中出现的过去分词有：
see — saw — seen
eat — ate — eaten
change — changed — changed
3. You used to share food with me!
解析：used to do sth.? 过去（经常）做某事（现在已经不做了）。