Join是+ing,还是直接+g?

Join是+ing,还是直接+g? join to 还是直接 join shine是直接加ing还是去e加ing clean加ing是直接加ing还是双写n加ing? grow的后面是直接加ing还是双写加ing collect的后面是直接加ing还是双写在加ing collect是直接加ing,还是去e加ing,还是特殊变位? chat的ing形式是直接加,还是双写在加ing join怎么加ing? 是JOIN SB 还是JOIN IN SB ,JOIN,JOIN IN,TAKE PART IN 有什么区别? wait到底是双写加ing还是直接加? 参加俱乐部是join the club 还是join club? 请问：是join in party（派对） 还是 join party 是join the game还是join in the game 是join in army还是 join in a army? take part in 是等于 join还是join in? about后面的动词是该带to还是直接加ing 一般来讲是join the army 还是 join army 还是join an army 到底是 join 还是 join in a group.I intend to join (in) your research group.