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belonging to somebody; relating to somebody 属于（某人）；关于（某人） a friend of mine 我的一个朋友 the love of a mother for her child 母亲对孩子的爱 the role of the teacher 教师的角色 Can't you throw out that old bike of Tommy's? 难道你就不能把汤米那辆旧自行车给扔掉？ the paintings of Monet 莫奈的画作
belonging to something; being part of something; relating to something 属于（某物）；（某事）部分的；关于（某物） the lid of the box 盒子盖 the director of the company 公司的董事 a member of the team 一名队员 the result of the debate 辩论的结果
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coming from a particular background or living in a place 出身于（某背景）；住在（某地） a woman of Italian descent 意大利裔女子 the people of Wales 威尔士人民
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relating to or showing somebody/something 关于，反映（某人或某事） a story of passion 爱情故事 a photo of my dog 我那只狗的照片 a map of India 印度地图
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used to say what somebody/something is, consists of or contains （用于表示性质、组成或涵盖）即，由…组成 the city of Dublin 都柏林市 the issue of housing 住房问题 a crowd of people 一群人 a glass of milk 一杯牛奶
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used with measurements and expressions of time, age, etc. （用于表示计量、时间或年龄等） -
used to show somebody/something belongs to a group, often after some, a few, etc. （常用在 some、a few 等词语之后，表示人或物的所属）属于…的 some of his friends 他的几位朋友 a few of the problems 其中的几个问题 the most famous of all the stars 最知名的一位明星
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used to show the position of something/somebody in space or time （表示人或事的时空位置）在，当 just north of Detroit 就在底特律以北 at the time of the revolution 在革命的年代 - (North American English)
at a quarter of eleven tonight (= 10.45 p.m.) 在今晚十一点差一刻
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used after nouns formed from verbs. The noun after ‘of’ can be either the object or the subject of the action. （用于由动词转化的名词之后，of 之后的名词可以是受动者，也可以是施动者） the arrival of the police (= they arrive) 警察的到来 criticism of the police (= they are criticized) 对警察的批评 fear of the dark 对黑暗的惧怕 the howling of the wind 狂风的呼啸
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used after some verbs before mentioning somebody/something involved in the action （用于某些动词后，后接动作所涉及的人或事） -
used after some adjectives before mentioning somebody/something that a feeling relates to （用于某些形容词后，后接与感情相关的人或事）因为，由于 to be proud of something 为某事自豪
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used to give your opinion of somebody’s behaviour （用于对某人的行为发表看法） used when one noun describes a second one （用于一个名词修饰另一个名词时）
Word OriginOld English, of Germanic origin; related to Dutch af and German ab, from an Indo-European root shared by Latin ab and Greek apo.