初二英语上册语法复习详解（34）-be good...用法　　34) be good(bad) for、be good at的相关用法 　　1.
be good for 对.
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有益 　　Doing morning exercises is good for your health.
　　做早操对你们的建康有益。
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be good at 擅长于.
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　　Li Ping is good at basketball.
　　　李平擅长于篮球。
　　= Li Ping is good at playing basketball.
　　　李平擅长于打篮球。
　　be good at = do well in 如： 　　Im good at math.
= I do well in math.
　　　我擅长于数学。
　　3.
be good to 对.
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好 　　Parents are always good to their children.
　　父母亲总是对他们的孩子好。