新概念三21课里有一句话:They were known as prizefighters
对于这句话的结构理解,有点模糊不清,请老师指教
理解1:主语they,谓语 were known , as prizefighters 介词短语作主语补语。
理解2: (在本网站查的其他类似例子)主语they, 谓语系动词were, 表语 known as prizefighters, 其中 as prizefighters 介词短语作状语,修饰known
这两种理解哪种是正确的?错误的那个,错误理由是什么呢?谢谢老师!