on in at这介词关于时间和地点上的用法?最好举例子!

1、时间介词 in,on,at
at < 天 (eg.noon,dawn,night,one’ clock)
on = 天 (Monday,30th June,New Year’s Day,Mother’s Day）
in > 天 (2008,summer,April,还有早午晚)
注意：
1) 早午晚前后如有修饰语则用 “on”
On Monday morning
On a sunny afternoon
On the morning of May 23rd
On a dark night
2) on,in,at不用于下列时间之前：this,that,last,next,every,each,today,yesterday,tomorrow,tonight
3) in+一段时间可以表“…之后”
Eg:Hurry!The school bus will leave in five minutes
I will see my grandparents in a few days.
2、方位介词：
1）at和in
in 大地点 ≥town
at 小地点 < town
eg.:in town at bus station
in Beijing at school
in USA
2）on表示在物体表面上 eg:on the table ,on the wall
注意：1) on the tree 长在树上 There is an apple on the tree.
in the tree 呆在树上 There is a bird in the tree.
2）on the wall 挂在墙上 There is a picture on the wall.
in the wall 嵌在强中 There is a window in the wall.

on
介词 prep.
1.(表示位置)在…上, 在…旁, 在…身边
That book on the desk is an atlas.
桌上的那本书是地图册。
2.(表示时间)在…之时
It occurred on the morning of the fifteenth.
事情发生在15号的上午。
On arriving h...