(The) number of the college students who(have )mobile phones(has)been greatly increasing since 2001
问题描述：
(The) number of the college students who(have )mobile phones(has)been greatly increasing since 2001
who(have )mobile phones是谁的定语呀?为什么不用has呢?
为什么不是The number of the college students 为主语呢？为什么who(have )mobile phones不是它的定语而是STUDENTS的定语呢？
答
who(have )mobile phones是students的定语呀,因为是复数,所以不能用has.