The past participle is planned.
Planned is the past participle of plan.
The past participle of "plan" is "planned."
The past participle is had.
Done is the past participle.
The past participle of the word "Find" is the word "Found."
The past participle of the word "pick" is "picked".
The past participle of the word "finish" is "finished."
Planned is the past participle. (It is also the simple past tense form)
The word "invited" is the past participle of invite.
The past participle of "swear" is "sworn."
The past participle of the word 'fall' is 'fallen'.
The simple past and past participle are both welcomed.