good
be good for/ be good to/ be good at
be good for 表示"对……有好处",而be bad for表示"对……有害"；be good to表示"对……友好",而be bad to表示"对……不好"；be good at表示"擅长,在……方面做得好",而be bad at表示"在……方面做得不好".
Doing eye exercises is good for your eyes.做眼保健操对你的眼睛有好处.
Eating too much is bad for you health.吃的太多对你的身体有害.
Miss Li is good to all of us.李老师对我们所有的人都很友好.
The boss is bad to his workers.这个老板对他的工人不好.
Li Lei is good at drawing,but I'm bad at it.李雷擅长画画,但是我不擅长.