be good (bad) for、 be good at的相关用法
1. be good for对......有益
Doing morning exercises is good for your health.
做早操对你们的建康有益。
2. be good at擅长于......
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：
I'm good at math. = I do well in math. 我擅长于数学。
3. be good to对......好
Parents are always good to their children.
父母亲总是对他们的孩子好。
