i impressed on him the importance of his work...impressed 是及

因为宾语the importance of his work太长了,我们就把on him 提前了.原始句子是：
I impressed the importance of his work that / which he - - - -on him.
--------你看,on him在句子的最後,这样显得不平衡.所以on him提前了,而语法的功能没有改变.-------- impress sth on sb == impress on sb sth that - - - - -(因为sth that - - -- 太长,所以放到後面).

及物动词的词性可见词典例句：I can`t think what you mean.再如Do you think it possible to finish the work before the end of this month? 虽然在

The importance of his work impresses me.
I am imoressed on the importance of his work.

impress 的对象是“我”