定语从句中who和whose的用法

例句呈现
1. Is he the man that / who sells the dog?
2. Do you know the boy whom / who / that I talked withjust now?
3. She was not on the train that / which arrived justnow.
4. What do you think of the photos that / which I tookin the park?
5. The book whose cover is green was lost yesterday.
6. The first place that we visited in Beijing was the Great Wall.
7. It was the largest map that I ever saw.
8. I have read all the books that you lent me.
9. Is there anything else that I can do for you?
10. They talked about the people and things that theyremembered in the old days.
11. Who is the man that shook hands with you just now?
小结归纳
关系代词that, which, who, whom,whose都可以引导定语从句，使用它们时我们应该考虑两点：
1. 先行词是“人”还是“物”；
2. 关系代词在定语从句中所充当的成分。
首先，当先行词是“人”时：
1) 关系代词在定语从句中作主语时，用that / who，如：句1；
2) 关系代词在定语从句中作宾语时，用whom / that / who，如：句 2。
其次，先行词如果是“物”时：可用关系代词that / which来充当主语或者宾语，如：句3、4。
综上所述， that既可以指“人”又可以指“物”，而which只能指“物”，who / whom只能指“人”；who / that / which 都可以作主语或宾语，而whom只能作宾语；此外， whose 在定语从句中放在某一个名词或代词前作定语，如：句5。特别需要指出的是：当关系代词作宾语时常常省略，而作主语时则不能省略，如：句2、4、6、7、8、9、10中的关系代词可以省略；而句1、3、11中的关系代词不可以省略。
另外，还有一些情况一般只用that引导定语从句：
(1) 当先行词被序数词或形容词的最高级修饰时，如：句6、7；
(2) 当先行词被all, some, any, no, little, much等修饰时，如：句8；
(3) 当先行词是everything, anything, nothing等不定代词时，如：句9；
(4) 当先行词既有人又有物时，如：句10；
(5) 当主句以疑问词who或which开头时，如：句11。

who只能指代人，在从句中作主语或宾语（但不能用在介词后面，介词后面只能用whom），如 I knew the man who beat him. whom也只能指代人，在从句中只能作宾语，如I knew the man whom he beat. whose在从句中只能作定语，修饰某个名词，这个名词可以是人，也可以是物。 I knew the man whose bike was stolen. 在口语中，whom 常被who代替。

who 的先行词是人，who在定语从句中可以做主语，可以做宾语。
whose 是表示人或物的所属关系。