定语从句中的There be
语法书上讲:在There be句型引导的定从中关系代词要用that
eg:There's a seat overthere is still free.
然后又讲：在以There be开头的句子中常用who而不用that,是不是先行词是人就用who?
eg:There's a man who wants to see u.
两者是否冲突?例句有什么不同?
抱歉。第一句是：There's a seat overthere that is still free.