大部分时候which引导定语从句并在定语从句中充当主语或宾语、表语等；但是有特殊情况下，“of ＋which”起形容词的作用即在从句中作定语，其词序通常是“n. ＋of which”。
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。
which先行词是 three camp beds；of which作two的定语。
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。
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。
Each corner had a guard tower, each of which was exactly ten meters in height.
每个角落都有一座警戒塔，每座警戒塔正好10米高。
Jessica scanned the lines, none of which had any punctuation.
杰茜卡把这几行飞快地扫了一眼，没有任何一行加了标点。
We struck up a conversation, in the course of which it emerged that he was a sailing man.
我们聊了起来，在谈话过程中得知他是一名水手。
The mountains are studded with dams, any one of which could wreak destruction in the valley below.
山区到处都是大坝，其中任何一个都可能给下面的山谷带来灭顶之灾。
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。
Ostracodes are small animals, most of which have a two valved shell.
介形虫是小型动物，其中大部分都具有两瓣的外壳。
The Social Security Retirement Program is made up of two funds, the larger of which could go penniless by next year.
社会保障退休项目由两个信托基金组成，其中较大的一个可能在明年身无分文。
There are two left, one of which is almost finished and the other of which is not quite.
剩下两件事，一件事几乎干完了，另一件还得干。
A survey was carried out on the death rate of new-born babies in that region, the results of which were surprising.
对该地区新生儿死亡率进行了一项调查，结果令人惊讶。
A survey was carried out on the death rate of those who were infected by SARS, the results of which were surprising.
对SARS感染者的死亡率进行了一项调查，结果令人惊讶。
A survey was carried out on the death rate of those who were infected by the pollution, the results of which were surprising.
对受污染者的死亡率进行了一项调查，结果令人惊讶。
Water enters into a great variety of chemical reactions, a few of which have been mentioned in previous pages.
水进入各种各样的化学反应，其中有一些已在前几页中提及。
It is reported that two schools, both of which are being built in my hometown, will open next year．
据报道，我的家乡正在建两所学校，明年将开学。
The man pulled out a gold watch, the hands of which were made of small diamonds.
那人拿出一块金表，表的指针是用小钻石做成的。
The house the roof of which was damaged has now been repaired.
The house of which the roof was damaged has now been repaired.
房顶损坏的那所房子现在已经修好了。