今晚上映什么节目(what's on tonight)中的on的词性?

what be on for tonight?(今晚有什么节目）为什么用for tonight而不用at tonight what's on tonight? what's on movie tonight WHAT'S ON TAP FOR TONIGHT Do you know what's on tonight by any chance? 请问 What's on ? 翻译为上演什么电影.那么这里的on 翻译为?是什么词性 做句子的什么成分呢? 今晚有什么菜?What's _ _ _ for dinner tonight? Let's look at the TV ____ and see what's on tonight.a.guide on board什么词性? on leave什么词性 是do you know what's on TV tonight 还是do you know what on TV t get on on的词性