something that had never done

问题描述

At times, I turn on the television and just leave it to chatter in the background, something that'd never done previously.

译文：有时，我打开电视仅仅是要一种氛围，这是我以前未做过的。

我的疑问：something that'd never done previously. 作这个句子的什么成分？请老师指教，谢谢！

老师答疑

米老师：

此处 something 是 background 的同位语， 紧跟其后的 that'd never done previously 是定语从句，修饰先行词 something，that'd 根据惯用法是输入时手误吧，应该改为that I'd ，值得注意的是定语从句与同位语从句的区别，例如：
① The news that you told me yesterday was really exciting．你昨天告诉我的那个消息真的很令人激动。（定语从句）
② We heard the news that our team had won．我们听到了我们队获胜的消息。（同位语从句）

黎老师：

something that'd never done previously 是

background的同位语，其中

that'd never done previously 是定语从句。

that'd似乎应该改为that I'd .

董老师：

谢谢两位老师！