在英语里面,什么是单复数形式?
在下面这首英语小诗里,找出里面名词的单复数形式.
Baa,Baa,Black sheep
Baa,baa,black sheep,have you any wool?
Yes,sir,yes,sir,three bags full;
One for my master,one for my dame,
And one for the little boy who lives down the lane.