文档介绍：一、“(be)+of+名词”结构表达的意义
1. "(be)+of+名词"结构中的名词是抽象名词时,相当于其中名词所对应的形容词的意思,说明被修饰词具有某种特征或属性。常用的名词有use/importance/help/value/interest/quality/service/benefit/necessity等。例如:
I don't want to hear what you are saying. It is of no interest to me.
我不想听你说,我对此不感兴趣。(of no interest=not interesting)
Doing morning exercises will be of benefit to your health.
做早操对你的健康有利。
Coal is of great importance to the development of industry.
煤对工业发展是相当重要的。(of great importance=very important)
2. "(be)+of +名词"结构中的名词表种类、数量、度量等时,表示不同的人或物的共同特征,此时名词前通常带有冠词。常用的名词有size/kind/type/price/height/depth/width/length/weight/age/shape/colour等。例如:    
We are of the same age. 我们同岁。
The twin sisters are of a size and the skirt fits each of them exactly.
双胞胎姐妹的身材一样,这件裙子两个人穿都非常合适。
Machines are of different types and 。
3. "(be)+of+名词"结构可以表示主语的根源关系,此时的名词多是表示亲属、血统、种族、国籍及出处的名词,常用的名词有family/blood/race/origin等。如:
We are of the same blood. 我们是同一家族。
They are of noble race. 他们出身名门。
二、“(be)+of+名词”结构的句法功能
1. 作表语。例如:
Don't throw anything that may be of use.
不要把任何有用的东西扔掉。(=Don't throw anything that may be useful.)
Flowers are of many colours. 花的颜色很多。
New Zealand wine is of high quality and is sold all over the world.
新西兰葡萄酒质量很高,行销全世界。
2. 作定语。例如:
Your sister is a girl of wisdom