1. 关系代词 whose，引导定语从句时，既可指人，又可指物，在从句中只能作定语；of whom 只能指人；of which 只能指物，有时 whose 可以与 of whom 和 of which 互换使用。如：

The girl whose hair is golden is from England. 头发金色的那个女孩是英国人。

The house whose doors are green is an office building. 门是绿色的那座房子是办公楼。

It was an actor whose name escapes me for the moment

那个男演员的名字我一时想不起来了。

We have two full-time secretaries, one of whom is on secondment from the RoyalNavy.

我们有两个全职秘书，其中一人是临时从皇家海军调来的。

Soldiers took away four people one of whom was later released.

士兵们抓走4个人，其中1个随后被放了回来。

His style of leadership has attracted increasing criticism among his supporters,

many of whom have since left Central Office.

他的领导风格已经在他的拥趸中引起了越来越多的批评，很多人后来离开了总局。

He was also a writer of beautiful stories, some of which are

collaborations with his fiancee.

他还写了一些美妙的故事，其中有些是和他的未婚妻合著的。

The house had its charms, not the least of which was the furniture that came with it.

这座房子有其吸引人的地方，比如和房子配套的家具就很出彩。

The profession offers a bundle of benefits, not least of which is extensive training.

这份职业提供了大量福利，全面训练就是其中很重要的一项。

Many theories on punishment exist, all of which are variations on a theme.

关于惩罚的理论有很多，虽形式略有不同，但其主旨都是一样的。

There are three conference rooms each of which is equipped with a screen,flipchart and audio visual equipment.

有3个会议室，每个会议室都配有屏幕、活动挂图板和视听设备。

I saw three camp beds, two of which were occupied.

我看见了3张折叠床，其中两张已有人占了。

He has a shelf full of things, each of which has associations for him

他的一个搁架上摆满了东西，每一样都能勾起他许多回忆。

In each packet there are batches of letters, most of which are undated.

每个包裹里都有一摞摞的信件，其中大部分都没有日期。

The football supporters began throwing missiles, one of which hit the referee.

足球迷们开始扔东西，其中还砸到了裁判一次。

以上12例摘自《柯林斯高阶英汉双解学习词典》

2. “介词 whose 名词” 引导定语从句。如：

I love my motherland, for whose good future I will work hard. 我爱我的祖国，为了她美好的未来我要努力工作。

3. 在下列情况下，一般只用 of whom 和 of which。

(1) 定语从句的主语是 few, little, some, most, many, much等时，一般只用of whom和of which。

In the room are lots of people, many of whom I don't know. 房间里有很多人，其中许多人我不认识。

He has a lot of story-books, a few of which I have never read. 他有很多故事书，有几本故事书我还从未看过。

(2) 定语从句的主语是数词、形容词的最高级时，一般只用of whom和of which。如：(from www.yingyuyufa.com)

The old man has three children, two of whom are college students and one of whom is a manager. 那个老人有三个小孩，其中两个是大学生，另一个是经理。

(3) 定语从句的主语是all, none, both, neither, each等不定代词时，一般只用of whom和of which。如：

There are fifty students in our class, all of whom are working hard. 我们班有五十个学生，所有这五十个学生学习都刻苦。

He planted two trees last year, both of which are growing well. 去年他栽了两棵树，这两棵树都长得好。

(4) 在定语从句中作表语的定语时，一般只用of whom和of which。如：

He has three brothers, of whom Li Lei is the youngest one. 它有三兄弟，李蕾是他们中最小的一个。

There are many countries in Asia, of which China is the largest one. 亚洲有很多国家，中国是最大的一个。