问题太大,简单回答: 一,介词on 1.表具体的哪一天: on Monday,on May 1, on the day he was born. 2.在(近似)平面的位置: on the table/wall/ceiling, on the hill,on the way/road/street,. 3.相当于about表示“有关于...的”: a question on English. 二,副词on 1.电器,机器等开着的,运转/行着的: The TV is on.Turn on the computer. 2.表动作状态的持续my love will be on. 介词副词均可和其前面的动词组成词组:look on,take on,go on.等.