请问:It is important for you to study 或 It is important of you to study 那种对?

问题描述:

请问:It is important for you to study 或 It is important of you to study 那种对?
句型好像是
It is adj.of/for sb.to do.
以后怎么分辨用of还是for?
还是都对?

It is important for you to study 对
用OF 的情况是:形容词是表示人的品行,很明显‘ 重要的’ 不是人的品行请问:It is nice of you to help me这里用of可以吗?对