常见介词用法：1）at,in,on在范围at (1)表示在小地方; (2)表示“在附近，旁边”in (1)表示 在大地方; (2)表示“在范围之内”。on 表示毗邻，接壤to 表示在范围外，不强调是否接壤He arrived at the station at ten.He is sitting at the desk.He arrived in Shanghai yesterday.Jiangsu lies in the east of China.Russia live on the north of China.Fujian is to the south of Jiangsu Province.2)above, over, on 在上above 指在上方,不强调是否垂直，与 below相对；over指垂直的上方,与under相对,但over与物体有一定的空间，不直接接触。on表示某物体上面并与之接触。The bird is flying above my head.There is a br
