问题描述：
behaviour到底可数吗为什么可以用 bad behaviours呢
到底什么时候可以用复数的啊
如I was scolding him for his bad behaviours at school.
到底什么时候可以用复数的啊
如I was scolding him for his bad behaviours at school.
问题解答：
我来补答展开全文阅读