英语中的分数做主语时，它是单数还是复数根据什么判断

Question

例如：Three quarters of the population _____ (be)Chinese.
There fourths of the money _____(have) been spent on books.
这两个空分别该用什么？根据是什么？

Answer 1

英语中的分数做主语时，它是单数还是复数根据它所修饰的中心名词是否为可数名词而定
Three quarters of the population _____ (be)Chinese.
are
population 单独使用时,为不可数名词,谓语动词用单数;但是一旦前面有百分数或分数短语修饰时,就视为可数,谓语动词用复数
There fourths of the money _____(have) been spent on books
has
money 为不可数名词,所以谓语动词用单数

Answer 2

根据分数所修饰的名词
如果该名词是可数名词则用复数
不可数名词则用单数
Three quarters of the population are Chinese.
There fourths of the money has been spent on books.
population是可数名词
money是不可数名词

Answer 3

1. are
2. has
一般由被修饰的名词决定，但是population被分数或百分数修饰时，谓语动词用复数。