of /ɔv,əv/ prep. 1. (属于)…的：a friend of mine 我的一个朋友 2.由…制成(或组成)的：a dress of silk 绸衣；a group of three 三人小组 The house is (made) of stone.这房子是石头建的。3.含有…的，装有…的：a house of three rooms 有三室的房子；a glass of milk一杯牛奶 4.(表示具有某种性质、状况)：news of importance 重大消息；a friend of ten years 有十年交情的朋友 5.(表示方位)：south of Beijing北京以南; at the end of the road 在马路的尽头 6.(表示同位)：the city of New York 纽约市；the month of May 五月， 7.(关于)…的：I have heard of him.我听说过他。 8.(表示数量或种类)：three tons of coal 三吨煤；a kind of oil一种油 9.由于，因为：He died of cancer. 他死于癌症。 10.(表示…的部分或全部)：three of us 我们中的三人(指部分) (比较：the three of us我们三人)(指全部)［考句］The course normally attracts 20 students per year, of whom up to half will be from overseas.这门课一般每年有20多个学生，其中将近一半来自海外。［考句］Living in the western part of the country has its problems, of which obtaining fresh water is not the least.在该国西部生活有诸多问题，获取淡水就不是一个小问题。 11.(表示免除，剥夺)：deprive a person of his right 剥夺某人的权利；cure a person of a disease给人治好疾病 12.(表示动作的对象或主体)：the discovery of America 美洲的发现 It was foolish of you to do so.你那样做真蠢。13.由于，因为：be glad of his success 由于他的成功而高兴。