1、作名词时有以下几个含义:明日、来日,前面用in,at,on皆可;
2、tomorrow既可以做副词,还可以作名词;
3、作名词,固定搭配,如:Tomorrow's workers will have to be more adaptable.未来的工人必须具有更强的适应性;
4、做副词, 如:She's leaving tomorrow. 她明天将要离开。