简要回答
on作介词时意为在…上，由…支撑着，做副词时意为表示持续性，向前，穿在身上，戴着。
on是一个使用频率非常高的单词，很多时候都是搭配其他的单词做短语使用的，很多人知道各种各样搭配短语的意思，但是不知道on单独的意思，那么下面小编就来跟大家说说on是什么意思。
详细内容
01
on英 [ɒn] 美 [ɑːn] prep. (覆盖、附着)在…上(意指接触物体表面或构成物体表面的一部分);由…支撑着;在(运输工具)上adv. 表示持续性;向前(移动);穿在身上;穿着;戴着
02
习语be on about sth(informal) 谈论（某事）；有…的意思to talk about sth; to mean sthbe/go/keep on about sth(informal, disapproving) 抱怨；唠叨；发牢骚to talk in a boring or complaining way about sthbe/go/keep on at sb (to do sth)(informal, disapproving) （对某人）絮叨；说（或问）得令人生厌to keep asking or telling sb sth so that they become annoyed or tiredbe on for sth(informal) 想要做某事to want to do sthit isn’t on(informal) 不行；没门儿used to say that sth is not acceptableon and on连续不停地；持续地without stopping; continuously
03
双语例句He is sitting beside her on the sofa 他挨着她坐在沙发上。I admired the peeling paint on the ceiling 我“观赏”着天花板上正在剥落的油漆。He got his winter jacket from the closet and dropped it on the sofa 他从衣橱里取出冬天穿的夹克，把它扔到沙发上。He continued to lie on his back and look at clouds 他仍旧仰卧着，望着天上的云彩。He leaned down and kissed her lightly on the mouth 他俯下身去，在她嘴唇上轻轻一吻。The maid looked at him, a nervous smile on her face 女服务员看着他，脸上带着一丝局促不安的微笑。
