英语四六级不会直接考察语法，但是听力中需要听句子，阅读中需要句子，作文中需要写句子，而语法是句子的骨架，有句子的地方就有语法，所以语法基础是四六级做题之根本。下面是四级语法辨析：more than与over的关系的资料，希望对你有所帮助！

　　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。)