mother,father,brother,sister,friend,grandfather,grandmother改成复数形式能在8点半前回答的,

问题描述:

mother,father,brother,sister,friend,grandfather,grandmother改成复数形式
能在8点半前回答的,

都是直接加s

按顺序依次是:mothers ,fathers ,brothers ,sisters,friends ,grandfathers ,grandmothers