(1)介詞放在句末時(shí),who,that,which可省
但介詞在關(guān)系代詞前時(shí),只能用“介詞+which/whom”結(jié)構(gòu).例如：
This is the house to which we lived last year.
=This is the house which we lived last year to
Please tell me to whom you borrowed the English novel
=Please tell me whom you borrowed the English novel to
(2).含有介詞的固定動(dòng)詞詞組中,介詞不可前置,只能放在原來的位置上.
　　This is the person whom you are looking for.這就是你要找的那個(gè)人.