o f介词短语在句中作表
语
Document number：NOCG-YUNOO-BUYTT-UU986-1986UT
of介词短语在句中作表语，of的含义有六种，现分述如下：
一、“be of+抽象名词”，这时的of短语相当于这个名词的同根形容词，作为表语表示主语的性质或特征。

of的意思是“具有、具备”等，常用于该结构的名词常见的有
of use=useful；of no use=useless；of importance=important等。

如：The matter is of great importance.=The matter is very important.
在形容词前常用very来修饰，在“of+抽象名词”结构中，名词前常用great, much等来修饰。

再如：It is of great importance for college students to master a foreign language.
=It is very important...对大学生来说，掌握一门外语是很重要的。

The information we received is of a highly confidential nature and relates to national security. 我们收到的信息是高度机密，且关乎国家安全。

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二、“be of+集合名词或其它类型的名词”，相当于belong to或have。

of表示归属关系或“有”的意思。

如：The army and the people are of one family.
=The army and the people belong to one family.军民是一家。

三、“be of+物质名词”表示主语是“用某种材料构成或制作的”，相当于be made of或be built of。

如：Our building was of bricks.=Our building was built of bricks.我们的楼房是砖建的。

四、be of+(表示种类、颜色、年龄、形状、价格等）名词，多用来表示主语的特征。

这类结构的主语可以是人，也可以是物，其中的of可以省略。

常用于该结构的名词有：kind,age,colour,size,height,shape,type,way,price等。

如：
Several of the stamps were of the unusual kind.其中几张邮票是不同种类的。

The two boys are of the same age.这两个男孩年龄相同。

She is of a different way of thinking.她的思维方式与众不同。

These two kinds of article are of the same price.这两种物品价格相同。

The twin sisters are of a size and the skirt fits each of them exactly.?
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五、“be of+名词”也可以表示“来源、组成”。

如：
He was of a poor peasant family.他出身贫农家庭。

The committee is of seven people.该委员会由7人组成。

六、“be of+形容词的最高级”相当于one of...。

如：
is of the best teachers in our school.
=Mr Wang is one of the best teachers in our school.
王老师是我们学校里最好的老师之一。

The English teacher of ours is of the quickest temper.
=The English teacher of ours is one of the quickest temper.我们的英语老师脾气最急躁。