用there be 结构(有)
如:There is a book on the desk。桌上有一本书。
a book是主语
on the desk是状语
There是引导词(单独没什么意义
is随主语变化
There are some books on the desk。桌上有好几本书。
there be 句型
there be +sth. +somewhere.
句子主语是sth.(大部分情况下是名词,有时候也可以是代词如:there is something(不定代词) wrong with my bike.)其实这是一个形式倒装的的句子。
ming ci