be sold or sell

be sold or sell be sold 、sell 的用法 to sell 和 to be sold sth be sold out,sth sell well 这里应该填to sell 还是 to be sold. be sold ,sell不是主动表被动的吗? sell-out 还是 sold-out sell后加good,变被动用be sold后加well, 一般现在时的被动：如：It always ____(sell) well,是填be sold吧? sell sale sold有什么区别啊 sale sell sold的区别(again 版) 表示售完 用sell out ,sold out?