I know it was stupid of me 请讲讲of me 的用法为什么在后面 有语法规则吗?

问题描述:

I know it was stupid of me 请讲讲of me 的用法为什么在后面 有语法规则吗?

这是一个句型:It was.of sb.to do sth.如:
It was stupid of me to lend him so much money.
It was clever of him to buy a house 10 years ago.
It was very kind of you to help me with my English.