但侧重点不同:
1)take part in指参加群众性活动、会议、劳动、游行等,往往指参加者持有积极的态度,起一份作用.
②All the students took an active part in the thorough cleaning.所有的学生都积极参加了大扫除.
③We should take an active part in school activities.我们应该积极参加学校的活动.
2)join in通常指参加某种活动,尤其指和其他人一起参加某项活动.例句：
②I hope you”ll all join in the discussion.我希望你们大家都参加讨论.
3)通常指参与并分享其中的快乐
②Everyone in the class is expected to participate in the discussion.希望全班同学参加讨论.
③I am sure the wide awake people of this country will participate in the debate.我相信这个国家的有识之士肯定会参加这场辩论.
2.attend 是出席的意思,表示在某种比较正式的场合出现.例如,上课,会议等.
attend a meeting/ party/wedding /attend school/university
①He did not attend the meeting yesterday.昨天他没有参加会议.
② Our teacher suggested that he attend a technical school.我们的老师建议他去上技校.
3.join 加入(某党派、组织、社会团体以及参军、入团等)
He joined the League in 2006 .他在2006年入团.
I will never forget the day when I joined the Party.我永远也忘不了入党的那一天.
例句：