compared 引导的过分短语是插入语还是状语

Six months out,more people who had quit abruptly had stuck with it—more than one-fifth of them ,compared to about one-seventh in the other group

请问这句话中的compared to是作什么成分的？

过去分词短语 compared to about one-seventh in the other group，是 more than one-fifth of them 的非限制性定语。等于：

more than one-fifth of them, which was compared to about one-seventh in the other group

还有一种分析，过去分词短语是more than one-fifth of them 的补充性状语，进一步说明两者的数字比例关系。

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

擅长：语法理论,语言学,文化背景 | 采纳率 86% | 回答于 1秒前

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其它 1 个回答

陈才 - 英语教师 1秒前

擅长：中考英语,词法问题

compared to sth结构

(1)前面有逗号作非限制性定语

(2)前面没有到后，作限制性定语

备注：如果是放在句首，一般都是作状语成分

关于这个短语作何种成分，以前回答过很多次了。