every day,our teachers come to school very early.but they go backs home very late
问题描述：
every day,our teachers come to school very early.but they go backs home very late
every day,our teachers come to school very early.but they go《 backs 》home very late.
这里back为啥要加s?
答
确切的来说,“go”后加“to do sth.”or "doing sth."or "n."所以加“s”是不可能的,l楼主可以再检查一遍是否看错,或者也有可能是题目出错了.