It is+形容词+for sb to do sth与It is+形容词+of sb to do sth有什么区别？分别是什么意思？

It is+形容词 + for sb to do sth 做某事对某人有好处

It is+形容词+of sb to do sth 一般指某人做某事很好/不好

例如：It is kind of you to help me. 你能帮助我太好了。
It is bad for you to drink too much. 喝太多酒对你身体不好。

呃，这个怎么说呢，打个比方吧，当你说It is 困难 for sb to 吃三十个包子时，你是说吃三十个包子这件事很难做。而说It is 牛逼 of sb to 吃三十个包子时，你是指那个人因能吃三十个包子而其人显得很牛逼。
所以前者批事，后者指人，不知道你懂了没有？懂了的话，留个名。

前者 for 是对于 的意思，it's good for you to stop smoking.戒烟是为你好。

后者 of 是属性，it's very nice of you to help me.=you're very nice to help me. 谢谢你帮我

能转换成sb is/are +形容词的 就是 It is+形容词+of sb to do sth

其中当sb.和形容词的关系是 对于sb.来说是“形容词”时，我们用for
其中当sb.和形容词的关系是 sb.是的“形容词”，我们用of

It is so important for you to do it (it's important for you)
It is kind of you to help me (you are kind)