would用于庄重场合,表示有礼貌的请求或表示,语气婉转,近似于“请您”
will就变成一种不加掩饰的请求,语气直率,近似于”请你“
won't you 语气则更加强烈
以 Listen to me 为例
Listen to me,would you?在这里最委婉,麻烦您听我说,可以吗?
Listen to me,will you?相对委婉,请你听我说好不好?
Listen to me,won't you?比较坚持,你会听我说的吧?
如果是 Let's do...,shall we Let us do ...,will you Do ...,will you / won't you Don't do ...,will you 其实,除了Let's do ..,shall we 其它都可以用 will you !