It is kangkang and Jane's mother和They are kangkang's and Jane's mother.的区别及's的用法

问题描述:

It is kangkang and Jane's mother和They are kangkang's and Jane's mother.的区别及's的用法

题目的后句错了应该是mothers.
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前句是共同的母亲,后句是两个母亲.
两个孩子都加's则是两个母亲,而两个人共同的母亲则只在最后面的孩子上加's.
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