a number of 修饰可数名词还是不可数名词

问题描述:

a number of 修饰可数名词还是不可数名词

修饰可数名词,像a lot of 即可修饰可数也可不可数

接可数
后面跟的都是复数名词

a number of 意为:许多,后面接复数名词,谓语动词用复数.
eg.A number of students were absent from the meeting.
许多学生没有到会.