If you listened to the questions carefully,you can answer them easily.为什么改成

问题描述:

If you listened to the questions carefully,you can answer them easily.为什么改成
you can answer----would answer

这是虚拟语气,表示跟过去的事实相反,
用情态动词加完成时态来表示.
如果你好好听了问题,就会回答起来更容易.(实际是回答起来的时候不容易.)
百度教育团队【海纳百川团】为您解答