She is her aunt.变成复数形式Those are my backpack,backpack用不用加s
问题描述：
She is her aunt.变成复数形式
Those are my backpack,backpack用不用加s
答
They are her aunts .
用加S
答
They are my aunts.
backpacks
答
They are her aunts.
加s 如 information,chalk,news,advice,water等是不可数名词,可适量积累一些.
答
They are their aunts
加s