That's a her black cat.如何改错
问题描述：
That's a her black cat.如何改错
答
该句子的问题是成分杂糅。去掉a或her任一即可。
That's a black cat.（去掉her）
That's her black cat.（去掉a）
答
a去掉
That's her black cat.
that , is, cat 已经说明了是一只猫。。。
如果是多只会这么说
Those are her black cats.
答
a 去掉
答
去掉A或her
答
a去掉
That's her black cat.
答
把a或her删掉
答
that's a black cat of her /that's a black cat /That's her black cat