It is climbed.
The past participle of am is been. Not does not have a past participle
No, it is not. It is the past tense and past participle of the verb to climb, and might rarely be used as an adjective (e.g. climbed mountains as opposed to unclimbed).
The past participle of "do" is "done." The past participle of "have" is "had."
The past participle of have is had....:) I have had...
The past and past participle for "buy" is "bought."
Being is the present participle. The past participle is been.
The past participle is thought.
Eating is the present participle; eaten is the past participle.
"Did" is the past and "done" is the past participle.
The past participle is had.
What is the past participle of do
It might be, rarely, as in climbed mountains versus unclimbed mountains).But it is usually a verb. It is the past tense and past participle of the verb "to climb."