it is adj of sb to do 句型中 of後的賓語能與前面的形容詞構成主表關係. 這類形容詞有:

good(好的),kind(友善的), nice(友好的),polite(有禮貌的),clever(聰明的),foolish(愚蠢的),

lazy(懶惰的), right(正直的)careful(細心的),careless(粗心的),right(正確的),wrong(錯誤的)

例如:

It"s too difficult for me to learn English well.

It is kind of you to help me.

It is nice of you to help me.

It is clever of you to work out the problem.

It is very kind of you to help them.

It"s very kind of you to look after my cat.

It is kind of you to say so.

It is very rude of her to say such words.

It’s foolish of him to go alone.

It"s very nice of you to help me.

It’s clever of you to work out the maths problem.

It’s foolish of you to do that.

It’s wrong of the other children to make fun of you.

It is kind of you to tell me the truth.