1、of 表示整体与部分的关系：即用于“部分+of+整体(which, whom) ”结构。如： He went with a group of people, few of whom were correctly equipped for such a c limb. 他和一队人一起去了，其中没有几个人配有进行这样一次登山的适当装备。
The buses, most of which were already full, were surrounded by an angry crowd. 公共汽车大多数都已经挤满了人，它们被愤怒的人群包围着。
2、在下列情况下，一般只用of whom和of which。
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，很多人我不认识。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。
3、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：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。
扩展资料：
which用作关系代词,可引导限制性定语从句或非限制性定语从句,引导非限制性定语从句时which可以用整个主句作为其前行词,相当于and that,有时还可引导不定式短语从句。
which, that
that和which都可引导定语从句,但以下情况引导定语从句的关系代词只能用that不能用which:
1、当先行词是all, everything, nothing, anything, little等不定代词,或被first, last, only, few, much, some, any, no等词修饰时,应该用关系代词that,不用which。
2、当先行词为形容词最高级所修饰时,关系代词用that不用which。
3、当并列的两个先行词分别表示人和物时,要用关系代词that而不用which。
4.、在强调句型“It is〔was〕...that〔who〕...”中,只能用that,不能用which。
5、同位语从句除了用whether, what, why等引导外,通常还用that引导,但不用which。
of 表示同位关系：即用于在A+of+B结构，其中的A 和B 为同位关系。如：
Her sons, both of whom work abroad, ring her up every week. 她的两个儿子，都在国外工作，他们每周都给她打电话来。
We’ve tested three hundred types of boot, none of which is completely waterproof. 我们已经测试过300种靴子，没有一种是完全防水的。
of 表示整体与部分的关系：即用于“部分+of+整体(which, whom) ”结构。如： He went with a group of people, few of whom were correctly equipped for such a c limb. 他和一队人一起去了，其中没有几个人配有进行这样一次登山的适当装备。
The buses, most of which were already full, were surrounded by an angry crowd. 公共汽车大多数都已经挤满了人，它们被愤怒的人群包围着。
在下列情况下，一般只用of whom和of which。
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，很多人我不认识。
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。(from www.yygrammar.com)
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：
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。
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。
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
比如：The old man has three children, two of them are college students. 这个长句子里包括了两个动词：has & are， 所以这个句子是个病句
可以改成：
The old man has three children. Two of them are college students.
或
The old man has three children, two of whom are college student.
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。
2.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。
例：In the room are lots of people, many of whom I don’t know. 房间里有很多人，很多人我不认识。
(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：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。
(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。