我记得语法上是分词作状语，逻辑主语要于主语维持一致，但我碰到过一些句子，它的逻辑主语明显不是主语，譬如：
begining in 2006, about 8000 people a day would turn 60.
to be honest, there really isnt a difference in meaning between very and really when used in those cases.
1. Beginning in 2006, about 8000 people a day would turn 60.
2. To be honest, there really isnt a difference in meaning between very and really when used in those cases.
句1，Beginning 的逻辑主语就是句子主语people。本句很好，是网友理解有误。假如改为Begun 才是错的。
句2，是状语从句的省略说法，或者说，分词前特意加从属连词，以表明分词的意义。在when used in those cases 中，是省略了已知的主语和be 动词，已知的主语便是上文的very 和 really。补充完整为：
when they are used in those cases