would可以表示过去的习惯 (= used to)
When he was young, he would sit/used to sit for hours, doing nothing.
When we were children, we would play/used to play basketball every Saturday. 我们小的时候，每个礼拜六都去打篮球。
Will you ~ ?是最常用的请求形式。would表示更有礼貌
Will you pass the pepper, please? / Pass the pepper, will you?
Would you turn down the TV a little, please?
Would you please turn down the TV a little?
Would you care for some more cookies? 你还要不要再吃些饼干？
Would you mind waiting five more minutes?