a part of sth that is left after the other parts have been used, removed, destroyed这语法结构?
问题描述：
a part of sth that is left after the other parts have been used, removed, destroyed这语法结构?
答
a part of sth 主语
that is left after the other parts that引导的定语从句 修饰主语
have been used,removed,destroyed 谓语 被动语态