be good to sb. 举个例子

是待某人好的意思，，，If you are good to me ,than I will be good to you too
你对我好的话，我就对你好，，，

be good for sb.和be good to sb

前者是“对某某有好处”，后者good to sb.是“对某某很好”。

例句：We should be good to wild animals.
我们应该善待野生动物。

Be good to me, for it went for you.
好好地对待我，我剪掉头发为的是你呀。

This is a good to man
这是一个好男人！