'Accepted' is a past participle of 'accept' already.
The past tense of "accept" is "accepted," and the past participle is also "accepted."
Accepted
The past participle is equipped. Equipt is also accepted.
accepted.
Both forms are struck. Stricken is also accepted for the past participle.
Present - accepting Past - accepted
Most commonly stridden but strode and strid are also accepted.
Sneaked and snuck are both accepted in standard English.
The past participle of do is done. The past participle of have is had.
The past participle of am is been. Not does not have a past participle
The past participle (and simple past) can either be knelt or kneeled. Knelt is most common.
What is the past participle of do