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Step One
1. Lead in Talk about your best friends
Who is your best friend?
What makes your friends so special?
2. Introduce my American friend Christine and ask students to observe comparative adjectives.
She is taller than I.
But I am cuter than she.
Her eyes are bigger than mine.
But I am slimmer than she.
Her English is better than mine.
But her Chinese is worse than mine .
She is heavier than I.
But she is more humourous than I.
Work out the rules:
We use comparative adjectives +______to compare (对比) ______ people or things.
Step Two comparative adjectives
We form comparative adjectives like this（形容词比较级的变化规则）
1.tall--taller
2.cute--cuter
3.heavy--heavier
4.slim--slimmer
5.humourous--
more humourous
6.good--better
bad--worse
Work out the rules
1.大部分+er
2.不发音字母e结尾+r
3.辅音+Y 结尾
将Y变i+er