Each room comes with its own bathroom．为什么要用comes？

每个房间都有单独的卫生间。
come with：伴随...发生；与...一起供给

Each room comes with its own bathroom
Each of the rooms comes with its own bathroom.
the rooms each come with its own bathroom.
就是这样用的

单数第三人称

Each+n 是单数

each得用单三