用例子来说明吧
1、I find it hard for you to finish your homework .for 后面接sb
I think it nice of you to help me .of 后面也是接sb
使用of / for 的区别
of 后面接表示人的品质特征的形容词,如 nice,kind ,clever,stupid 等.
2 接clause
I think that it 【is】 hard for you to finish your homework .这是从句 有谓语动词 is ,it 做形式主语
that 引导宾语从句可以省略.从句是指,放在verb 的后面
无疑后请采纳.
书山有路勤为径,学海无涯苦作舟.
-----------与君共勉-----------