a couple of+n(c).作主语时谓语动词通常用单数
它有两个含义
1.两个
e.g.There is a couple of boys waiting for you.
2.一些,几个
e.g.I don't know why I feel so tired, I only had a couple of drinks.
couple
n.对;夫妇;数个
v.连结;交配
They are a nice couple.
他们是很美满的一对。
The couple seemed to be on cloud nine.
那对夫妇看上去极其幸福。
望采纳谢谢!