还原到句子中就变成了,The book, based on a true story, tells .....
实际上它和主语的关系就是The book is based on a true story.
被动的提到开头就用过去分词,主动的用现在分词,比如:
Showing the fact that junk food is bad for our health, the doctor also recommends that we eat a lot of vegetables.
追问其实就是主动用ing 被动用过去分词作状语对吗?
追答是的