Eight years (has|have) pass since he left

题目

Eight years (has|have) pass since he left
选什么 讲下理由啊

答案

has
Eight years 指的时间,时间的谓语都是单数
表示数目、度量、时间、金钱、距离等的复数名词,看作整体时谓语都是单数.
One hundred kilometers is a long distance.100公里是一段很长的距离.
Five plus two is seven.五加二等于七.
Fifty years has passed away since they met.
自从他们见面,50年过去了