英语高人快来帮忙解释这句话的语法现象!

问题描述:

英语高人快来帮忙解释这句话的语法现象!
However cold it is,the little boy would deliver the milk to us at 6:00.
句中的"would"到底指的是什么时态呢?这样用表习惯动作对吗?

would表委婉
和时态无关