是JOIN SB 还是JOIN IN SB ,JOIN,JOIN IN,TAKE PART IN 有什么区别?

是JOIN SB 还是JOIN IN SB ,JOIN,JOIN IN,TAKE PART IN 有什么区别? join sb in doing还是join sb doing join sb in.join sb in. join sb.in sth. join join in join sb. in sth.的区别 是join in army还是 join in a army? take part in 是等于 join还是join in? 请问：是join in party（派对） 还是 join party 是join the game还是join in the game 到底是 join 还是 join in a group.I intend to join (in) your research group. join sb in 和join sb for的区别 join sb join hands 对吗,还是join in hands join organizations还是join in organizations 参加CCTV‘s Around World Show用join,join in 还是take part in? 是attend the party 还是take part in 还是join in还是join并且给出理由 join join in 区别? 是join in the event还是 join the event? 活动event,不知好用join in吗?