sold 原型就是sell,sell out就是全都卖光了的意思,sold 过去式和过去分词都是sold 这本身就是被动语态啊~是一个现在完成时的被动语态,不知道你想问什么
一般过去时：His bikes were sold out.
过去完成时：His bikes had been sold out.
主动语态：He has sold out his bikes.
你要问什么啊?