Past of participate
The word "participated" is correct and usable in written English. It is usually used to describe someone joining in an activity, usually a group activity, either as an active or a passive participant. Example sentence: She participated in the marathon to show her support for the cause.
He participated in protests and congressional hearings and appeared on national television frequently.
It is easy to see who has not participated, and encourages all students to do so.
Then one woman turned up with her sister, who had not participated in the project, and the atmosphere turned tense.
Kenya's chief of defence, General Julius Karangi, said fighters from an array of nations participated in the attack claimed by al-Shabaab, a Somali group allied with al-Qaida.
He is head of chambers at Three Raymond Buildings, a set which participated in the last half-day stoppage in January.
In the time since the terrorist attacks, close to 7,600 of the country's 18,000 police departments have participated in the program.
Iran's president, Hassan Rouhani, who promised to advance equality for women upon assuming office last month, greeted her in a tweet: "Shirin Gerami, 1st female triathlete to have participated in world championship wearing Iran's colours #GenderEquality".
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MA of Applied Linguistic, Maquarie University, Australia