有点多，有点耐心慢慢看，还望采纳答案，多谢！关于On的用法(1) 作介词：1. 表示位置：在……上Mary’s coat is on the desk .They’re going to work on a farm .There are many apples on the trees .I have them on this piece of paper .There was a big smile on her face .Jim and Li Lei meet on the road outside Li Lei’s house .Which channel is it on ?2. 表示时间：在……（天）...
