马的复数英文怎么说

马的复数英语是 "horses"。

关于"horses"这个单词的来源，它是由古英语"hors"演变而来的。在古英语中，"hors"是马的复数形式，而在中古英语时期，"hors"变成了"horses"。

下面是一些关于"horses"的例句：

She pkes to ride horses. (她喜欢骑马。)
He has several horses on his farm. (他在农场里有几匹马。)
The horses in the race were running at full speed. (比赛中的马们正在全速奔跑。)