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能够掌握并应用情态动词could，如：
One year ago, she couldn’t do it at all.
When she was five, she could dance just a little.
Skill aims
能够在老师的帮助下或根据图片用所学的表达法叙述现在能做和不能做的事情，谈论过去的经历；
3. Emotional aims
通过小组间良性的竞争与合作，培养友好互助的精神。
Ⅲ. The key points and difficult points
Key points
能够用英语谈论过去不能做couldn’t和现在能做can do事情的表达方式；
能用can…but…couldn’t…句型描述经历。
Ⅳ. Learning strategies
运用表格能够帮助学生记忆阅读短文的主要信息。
Ⅴ. Teaching aids
黑板和多媒体
Ⅵ. Teaching procedures
Stage1 Greeting
Ask and answer some questions about ability.
2.Show the learning objectives.
Stage 2 Pre-reading
1. Learn to use could/couldn‘ t to express ability.
2. Show the pictures and ask the students to predict.
Stage3 While-reading
Read the passage and check the prediction.
Read the passage and match the students with the pictures.
Guess the meaning of the new word ago from the context.
Read the passage and fill in the blanks, then check the answers with the classmates.
Fill in the blanks.
Stage4 Post-reading
Show the key words and the phrases of this passage and retell.