sheep,tennis,piano,basketball,worker,doctor,这些单词全部变为复数形式是怎样的?

问题描述:

sheep,tennis,piano,basketball,worker,doctor,这些单词全部变为复数形式是怎样的?

sheep [ 复数sheep ]
tennis [ 复数tennis]
piano[ 复数pianos ]
basketball [ 复数basketballs]
worke[ 复数workers]
doctor[ 复数doctors]