答：1)join及物动词加入（团体，组织，参军）、同……一起干或玩、连接
例句：①I joined the Party in 1975.
（我1975年入党。）
②His brother joined the army two years ago.
（两年前他哥哥参军。）
③They are planning to join the two towns by a railway.
（他们在计划用一条铁路把两个镇连接起来。）
2)join in 参加（某些活动）
例句：①May I join in your discussion?
（我可以参加你们的讨论吗？）
②Many people join in the game every year.
（每年许多人参加这个游戏活动。）
③He joined in the work without a second thought.
（他未加思索地参加了那项工作。）
3)take part in 参加（群众性活动，会议等）参加者持积极态度，起一份作用。
例句：①A lot of students took part in the thorough cleaning yesterday.
（昨天许多学生参加大扫除。）
②A lot of college students took part in the movement last year.
（去年很多大学生参加了那个运动。）下载本文
