The pen bought by her is made in China. 为什么bought by her 做 the pen 的定

题目

The pen bought by her is made in China. 为什么bought by her 做 the pen 的定
The pen bought by her is made in China. 为什么bought by her 做 the pen 的定语而不是主语补足语呢

答案

你先要知道主语补足语的概念
主语补足语就是在被动语态中,将宾语充当补充主语的作用.
例如 The boy was caught stealing.
steal的动作发生者是Boy 这才叫主语补足语 而这道题 buy的动作发生者是her 不是pen 怎么能是主语补足语呢