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Understand about how long people have something of the subject, can use since, for talking about their personal belongings.
情感目标:
Correct handling and use their waste materials
教学重点:
相关的词汇与现在完成时态表示持续性动词和状态的用法。
教学难点：
让学生理解延续性动词可用于表达持续性动作和状态，能够与since 和for 搭配运用。
教学过程：
Step 1: Preparation
通读课本73-74页，完成下列题目：
1. have a yard sale________________ 2. More than (同义词) ________________
3. 捐给，赠送________________ 4. People in need________________
5. memory（复数）________________ 6. 不再________________
Step 2:Presentation.
Show a picture having a yard sale and as“Do you know?”,then explain a yard sale to students.
Work on 1a:Look at the things at the yard sale. Do you have any of these things at home? How long have you had them?
Step 3:Practice
Listening text. Listen and check (√) the facts you hear. (1b)
Read the listening metical, and role-play.
language points:
for and since
for和since常用在现在完成时的句子中，通常回答How long 引导的疑问句。for后面引出表示一段时间的词或短语，since引出表示时间点的短语和过去时从句。
Practice:
我们学习英语已经6年了。
We have learned English for six years.
We have learned English since six years ago.
选用for和since填空:
1.We haven’t seen each other ______ a long time.
2.His father has been in the factory ______ 10 years ago.
3.The film has been on ______ 20 minutes.