Yes, it is the past participle of the verb train.
I have trained hard for the event.
The word "trained" can be both a participle and a gerund depending on its use in a sentence. As a participle, it functions as an adjective (e.g., "the trained dog"). As a gerund, it functions as a noun (e.g., "training is important").
The past participle is had.
Done is the past participle.
The past participle of the word "Find" is the word "Found."
The present participle of the word "go" is "going."
Trained.
The word "trained" can be both a participle and a gerund depending on its use in a sentence. As a participle, it functions as an adjective (e.g., "the trained dog"). As a gerund, it functions as a noun (e.g., "training is important").
The past participle is trained.
The past participle is had.
Done is the past participle.
No, the word old is an adjective, not a participle.
The past participle of the word "Find" is the word "Found."
The present participle of the word "go" is "going."
The past participle of the word "pick" is "picked".
The present participle for the word 'hit' is 'hitting'.
The past participle of the word "finish" is "finished."
No. The word "vast" is a straightforward adjective, not a participle.