They are classmate.Their classroom 错在哪里
问题描述：
They are classmate.Their classroom 错在哪里
答
classmate是复数形式应该加s
答
They are classmates. Their classroom
答
classmate加s
答
classmate是复数形式应该加s
如果她们是同班同学那么classroom就不用加s 如果她们分别拥有几间不同的教室，那么classroom也应该加s
望采纳 谢谢