No, the word old is an adjective, not a participle.
The past participle of the word "have" is "had."
The past participle of the word "do" is "done."
The past participle of the word "Find" is the word "Found."
The past participle of the word "finish" is "finished."
The present participle of the word "go" is "going."
The present participle for the word 'hit' is 'hitting'.
The past participle of the word "pick" is "picked".
No. The word "vast" is a straightforward adjective, not a participle.
The past participle of the word 'be' is 'been'. 'They had been running fast for several minutes.'
The past participle of the word "touch" is "touched."
The past participle of the word 'fall' is 'fallen'.
The past participle of the word "swore" is "sworn."