牛津實用英語語法 57 who，whom，which和what作介詞賓語
A who，whom
在正規英語中我們用介詞+whom結構：
With whom did you go?
你和誰一起去的?
To whom were you speaking?
你剛才在跟誰說話?
但在日常口語中我們常把介詞置于句末。這時一般將whom變成who：
Who did you go with?
Who were you speaking to?
B which，what
在正規英語中我們用介詞+which/what結構：
To which address did you send it?
你把東西寄到哪個地址去了?
On what do you base your theory?
你的理論依據是什么?
在非正規英語中我們將介詞置于句末：
Which address did you send it to?
What do you base your theory on?
