participate 指在感情、观念或行为方面与他人共同参加某一活动.常与介词in连用
join in
join in sth./ doing sth.意为“参加”,后面接的宾语一般是表示竞赛、娱乐、游戏等活动的名词或V-ing.
例如：
Can I join in the game?我可以参加这个游戏吗?
They all join in singing the song.他们一起唱这首歌.
附练习：用take part in,join和join in的适当形式填空.
1.My brother the army in 2002.
2.I didn't want to their argument.
3.May I the competition?
4.We are playing football.Do you want to
5.You are welcome to us.
参考答案：1.joined 2.take part in 3.join in 4.join in 5.join