Three years后面系动词用单数还是复数?
问题描述：
Three years后面系动词用单数还是复数?
答
一般看成单数形式,表示一段时间,比如:
Three years is a long time.
有时候为了强调数量也把它看成复数形式,比如:
Three years were taken by him to do that.
答
单数,不管是一年还是一百年,都用单数.
如：
Three years is a long time.
三年是 一段很长的时间.