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Step 1. Revision
Review the words: tall , short , heavy , thin , long , big , small , old , young , strong.
Step 2. Lead-in
利用PPT引出：tall - taller , strong - stronger , young - younger...
Step 3 . Presentation
Ask students : How tall are you?
Help them to answer : I’m 1.7 meters.
How tall is he?
He is 1.8 meters.
Lead them to say:
I’m shorter than him.
He is taller than me.
Step 4. Practice
Ask two students’ ages. Help them say:
A is young. B is younger.
B is younger than A.
A is older than B.
用同样的方式比较两个人的体重，身高等。
Step 5. Learn Section A Let’s talk.
利用班班通畅言教学系统。
Step 6. Conclusion
形容词比较级的构成（规则变化）
一般在词尾加er.
以e结尾加r.
双写末尾字母加er.
以辅音字母加y结尾，改y为i加er.
Step 7. Homework
Write the right forms.
1.The black dog is ___(thin) than the white dog.
2.This bag is ___(big) than yours.