把下列句子改成被动语态We can't exchange articles which customers have bought during the sale

问题描述:

把下列句子改成被动语态We can't exchange articles which customers have bought during the sale

The articles which customers have bought during the sale can not be exchanged.
客人购买的特价商品不能退换
主动语态里含有修饰成分的宾语在改成被动语态时,要带着一起
带有情态动词的被动,用情态动词加be 加过去分词