how was everything going on 这个on 是什么词性?

how was everything going on 这个on 是什么词性? how was everything going on? -How's everything going on?-___. Everything is going on! How is everything?How is everything ____?可以填going/going on/g how is everything going on是这样说吗 how is everything going on recently?为什么要用recently? How is going on 英语how is everything going on with you in Europe?Q How is everything going on for the hiking tomorrow?求正规翻译, 英语翻译Dear Tom,How is everything going on with you?I'm writing on one 是什么词性