In (1), "rushed" is an active verb; in (2), "was piled" has a passive or adjectival sense.
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imantaghavi I found him sitting at a desk, piled high with files.Omit the comma. It suggests that he was piled high with files.
imantaghavi as he rushed out of the office.HE rushed out. Active participle: rushing. (applies to 'him')
imantaghavia desk which was piled high with filesThe DESK did not pile the files. Some person did. So (passive) The desk was piled .... Passive participle: piled. (applies to the desk)
imantaghaviThank you CJ. So, what you mean is that all the verbs in simple past change to gerund in the participle clause, is that right?Regards,ImanI hesitate to say all because English has exceptions, as you know. But an active simple past should generally be like the -ing form if you transform a main clause to an -ing clause. I'm not exactly sure why you