（2）Do you think one should stay faithful to the person (whom) one is married to?

你认为一个人结婚后应该忠实于他的伴侣吗？

（3）The suona horn is the instrument that really excites me.

唢呐是真正使我激动的乐器。

注意：a. 在口语中,who可以代替whom，作宾语，如例2还可用who/that来引导。b. 关系代词在定语从句中作宾语时，一 般可以省略，再如例2中的whom。

2. whose

一个表示所属关系的关系词。可以修饰人，也可修饰物。修饰人时，有时可与of whom换用；修饰物时,有时可与of which换用，whose在定语从句中作定语。

Is there anyone here whose name is Wang Lin? 这儿有个名叫王林的人吗？

I saw some trees whose leaves were black with diseases.(=I saw some trees the leaves of which were black with diseases.) 我看见一些树的叶子因病害而发黑。

3. that, which

二者都可修饰物，在定语从句中可作主语或宾语。

The film (which/that) we saw last night is wonderful. 昨天晚上我们看的那部电影太棒了。

that指物时，一般可和which换用，但在下列情况下,只用that

A. 先行词为all, anything, everything, nothing, something等

I will do all (that) I can to help you.我将尽我所能来帮你。

B. 先行词被序数词、形容词最高级或the only, the very等修饰时

It's the best film that has ever been made on the subject of madness.

这是以精神病为题材而拍摄的影片中最好的一部。

These are the very books (that) I am looking for.这些书正是我要找的。

C. 先行词既有人又有物时

They talked about the people and the things (that) they remembered in the school.

他们谈到他们所记得的学校中的人和事。

D. 当主句是who或which, what开始的疑问句时，定语从句用that引导。

Who is the boy that was here just now? 刚才在这儿的那个男孩是谁？

E. 当that所代替的先行词在定语从句中作表语时

This is not an easy question that you think it to be. 这个问题不是像你认为的那么容易。

F. 定语从句中动词为there be时，关系代词用that或省略