be good at / be good with /be good to / be good for的区别及用法
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.=I’m good at ch ess 我擅长下象棋。
2）be good with意为与……相处得好”（关系好）
例如：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：vegetables is good for your health.蔬菜对你的健康有好处。
1. Are you ____ ____old people?
2.I am ____ _____ singing and dancing.
3.Eating too mudh junk food is not ___ ___our health.
4.we should be ___ ___others.
