be good at / be good with /be good to / be good for

be good 后接不同的介词,表达的意思也不同.

1）be good at 意为“擅长……”,后接名词、代词或ving形式.例如：

I’m good at playing chess.

我擅长下象棋.

2）be good with意为“灵巧的；与……相处得好”=get on well with.例如：

She is good with her hands.

她手很巧.

He is very good with the children.

他与这些孩子处得很好.

3）be good to意为“对……友好”.例如：

My friend was good to me when I was ill.

我生病时我的朋友对我关怀备至.

4）be good for意为 “对……有好处”.例如：

Eating more vegetables is good for your health.