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 join in join sb. in sth.的区别 take part in 是等于 join还是join in? join＆join in＆take part＆take part in的区别 join sb.in sth. join sb in. take part in,join,join in,be in区别? join sb in 和join sb for的区别 请问join…(in); join in; take part in; attend有什么区别? join sb in doing还是join sb doing join join in 区别? take part in,join,jion in之间有什么区别