参加英语有单词可以是join.过去式形式为joined.例如My brother joined the army five years ago，我哥哥五年之前参了军。
还有一个短语，take part in，意思也是参加，过去式形式为Took part in，We took part in protecting the environment yesterday，昨天我们参加了保护地球的行动，还有一个单词参加Attend，过去式形式在词尾直接加ED，He attended the concert yesterday，昨天他参加了音乐会
