The past participle can be leaped or leapt.
The past participle of "form" is "formed."
The past participle form of wear is worn.
The past participle form of "give" is "given".
The past participle is done.
Were is a past tense form of be. The past participle of be is been.
Tried is already in past participle form. It is the past participle of try.
The past form of "slay" is "slew" and the past participle is "slain."
Consumed is already in past participle form. It is the past participle of consume.
The past participle is fled.
The past participle form of "preach" is "preached." For example, "He has preached at that church for many years."
The past participle is displayed.
The past participle form of "laugh" is "laughed."