I'm going (on) tomorrow morning.这个on该不该加?

问题描述:

I'm going (on) tomorrow morning.这个on该不该加?
I'm going this weekend.I'm going on Sunday morning.这两句都是正确的,那么tomorrow morning应不应该加on呢?

I'm going tomorrow morning.不加on
morning /afternoon /evening 等词前面有this ,tomorrow 等词时,不能再加介词.
而 on Sunday morning 要加on ,Sunday 表明 “具体某一天”的早晨,应该加介词on.