Bean curd is the food which I am fond of .
it被關係代名詞取代

Do you know the time on which John went to America?

* 「原裝」：Do you know the time on which John went to America?
「變裝」：Do you know the time which John went to America on?
「簡裝」：Do you know the time John went to America on?

This is the book in which you can find the answer.

* 「原裝」：This is the book in which you can find the answer.
「變裝」：This is the book which you can find the answer in.
「簡裝」：This is the book you can find the answer in.
有錯請告知，我很久沒念了