连词+分词作状语,其实就是状语从句的省略,分词逻辑主语需要和句子的主语保持一致。
eg. You must be careful while crossing
the road.
Once published,the book will be
popular.
If heated, water can be turned into
vapor.
所以The book can't be seen when
dying这个句子是不对的 ,分词的逻辑主语和句子主语不一致,就不能用省略句。
连词加分词做状语,逻辑主语必须和主句的一致