what's on 里面的on是什么词

what's on 里面的on是什么词 how was everything going on 这个on 是什么词性?So,what's going on?里面的是介词还是副词? what’s going on的答语是什么 what's up和what's on的区别?what's up和what's on的区别是什么? What's on the shelf的中文意思是什么 what's happening on ^可能是什么时态 what's going on... What's going on? What’s going on? What's going on What’s going on. what's on sale? What's goin' on what`s on what's goin on? what's on it what's on tonight?on的词性和意思 What's on the desk?的翻译