This is a regular verb. It follows the conjugation pattern of the verb falar.
Present:
A Ana participa da reunião.
A Ana participa na reunião.
Ana participates in the meeting.
Preterite:
O Miguel participou do evento.
O Miguel participou no evento.
Miguel participated in the event.
Conditional:
A Clara participaria se fosse convidada.
Clara would participate if invited.