we must study english hard or we can't be good at it,反义疑问句说明道理

Question

we must study english hard or we can't be good at it,
反义疑问句
说明道理

Answer 1

we must study english hard or we can't be good at it,can we?
道理,先翻译,我们必须努力学英语,不然我们不会在英语方面做得好,这句话主体是后面,所以反义疑问句应该是对我们能不能在英语方面做得好提问,所以应该用“能吗”,就是CAN WE