and the difference between and"popular"words is of great importance这句里为啥is后面接of呢?是啥语法

and the difference between and"popular"words is of great importance这句里为啥is后面接of呢?是啥语法

题目
and the difference between and"popular"words is of great importance这句里为啥is后面接of呢?是啥语法
完整句是:such words are called "learned",and the different between them and "popular"words is of great importance to a right understanding of language.
答案
这个是个be动词+of的句式..
be +of+名词=be +形容词
相当于is very important
great就是非常、很的意思..
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