be good for“对……有益”,其后接表示人或事物的名词。
例:
The young should be good to the old.年轻人应该孝顺老人。
Doing morning exercises is good for our health.做早操对我们的健康有益。
意思是:对...有好处
比如,Apple is good for our health,就是说苹果对我们健康有好处...
对……有益处
e.g. Doing exercise is good for our health.锻炼对我们的健康有益处。
比较:be good to sb. =be kind/friendly to sb. 对某人友好
be good at (doing) sth.擅长于(做)某事
值得,有效; 利于
对……有好处,反义词是be bad for