I found this article about Participle Phrases, It's the first time I hear about them. I always thought they are all reduced relative clauses.
How do they differ from reduced relative clauses?
Consider this example:
Removing his glasses, the professor shook his head with disappointment.
It seems like the original sentence could be like
While the professor was removing his glasses, he shook his head with disappointment.
That is obviously more complicated than a simple reduced relative clause. Right? How many types are there? I mean which phrases can be reduced to a particle-phrase?