关系词的语法功能

1. 连接作用，引出定语从句；

2. 关系词指代句中的先行词，甚至可指代主句中的一部分或整个主句；

3. 并在定语从句中充当一个成分。

例句：

1. The tall girl who / whom Tom is talking with is our monitor.

和汤姆说话的那个高个子姑娘是我们的班长。

2. She will become the famous writer which / that her parents expect her to be.

她会成为父母所期望的那种著名作家的。

3. He is a man whom everybody respects.

他是一个人人都尊敬的人。

4. This is the boy whose father (= the father of whom) is my teacher.

就是这个男孩，他的父亲是我的老师。

5. The young man who / that is singing is my old classmate.

正在唱歌的那个年轻人是我的老同学。

6. He is not the same as he was.

他和从前不一样了。

7. 1949 was the year when (= in which) the People’s Republic of China was founded. 

1949年是中华人民共和国成立的那一年。

8. I recently went back to the village where I was born.

最近我回到了我出生的村庄。

9. That is the reason why I am in favor of revising the program.

这就是我赞成修改规划的理由。