more than与over的关系

over做介词表“超过”时，可用more than代替。

例：he has stayed here over a year.

= he has stayed here more than a year.

（他已待在此地一年多。）

he has stayed here more than over a year.(x)

he has stayed here much over a year.（×，much应删除）

over five students are here.

= more than five students are here.

（这里的学生有五人以上。）