在英语中介词后面的代词一般用宾格形式。

构成介宾短语。例如I knew you bought a book from the library. I AM interested in it. Just now the boy told us an interesting story, all of us are fond of it. On the way home li ping found a blind girl. Now he is taking good care of her at home.

介宾短语,当然是宾格了

介词加关系代词的三种形式：

①.of whom谁的，②.of which.属于那一类,③.of that.那是什么。