请多多指教The question being discussed is of great importance.The question being discussed is of great importance.is是系动词,of great importance.of怎么可以连接great importance做表语呢?我是第一次看到这样的句型,请知道

请多多指教The question being discussed is of great importance.
The question being discussed is of great importance.is是系动词,of great importance.of怎么可以连接great importance做表语呢?我是第一次看到这样的句型,请知道给小弟解释下,请多多指教.

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 nouse=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.
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.
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：
Mr.Wang 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.

是系动词，of great importance.of怎么可以连接great importance做表语呢？我是第一次看到这样的句型，
其实这是很常见的结构：抽象名词当表语时，要在这个抽象名词前加of，即：be of +抽象名词，等于这个抽象名词的形容词：be + 形容词。如：
Character is of great importance. 人品最为重要。=Character ...

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是系动词，of great importance.of怎么可以连接great importance做表语呢？我是第一次看到这样的句型，
其实这是很常见的结构：抽象名词当表语时，要在这个抽象名词前加of，即：be of +抽象名词，等于这个抽象名词的形容词：be + 形容词。如：
Character is of great importance. 人品最为重要。=Character is very important.
The book is of great use.=The book is very useful.
His idea is of great value.=His idea is very valuable.
还有类似的词：help=helpful

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