A who，whom

　　在正規(guī)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(guī)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(jù)是什么?

　　在非正規(guī)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?