“be of+抽象名词”,该结构相当于“be+抽象名词的同根形容词”结构,用于此结构的名词常见的有value, importance, use, help, significance, interest, honour, courage等,在这些名词前可以用great, some, any, much, little, on等词修饰.
e.g. The meeting is of great importance.
=The meeting is very important.
这个会议很重要.