be made out of 是固定用法吗?

题目

be made out of 是固定用法吗?
she made the dress out of some curtains 中为何没有be动词?

答案

be made out of 是固定用法,“由.制成,由.构成”,主语为物品,产品,材料.
如果主语是人,那就要拆分开使用,意思不“.用.制成.”
she made the dress out of some curtains
她用一些窗帘做成了衣服.