These rooms are Mary's and Lili's.这种形式正确,还是These rooms are Mary and Lili's.正确?
问题描述：
These rooms are Mary's and Lili's.这种形式正确,还是These rooms are Mary and Lili's.正确?
答
第一种对.A and B's是单数,两者共有的.A's and B's是复数,两者各有的