in,on的用法

in
prep.
(表示位置)在…里面; 在, 于; 在…部位上
I could feel the tension in the room.
我可以感觉到房间里的紧张气氛。
(表示时间)在…时期, 在…之后, 在过程中
In her twenties and thirties she had had no difficulty getting jobs.
她在二三十岁时找工作一点也不困难。
(表示方向)往…内, 朝…方向
I saw him go in the shop.
我看到他走进了商店。
(表示状态)处于…之中, 在…情况下
Martin was in his pyjamas.
马丁穿着睡衣。
(表示方式)用, 以, 按, 乘, 以…形式
They were speaking in Italian.
他们在讲意大利语。
(表示原因)由于, 为了
He went in fear of his life.
他为自己的性命担忧, 所以走了。
(表示领域, 范围)在…以内
It is not in my power to do that.
做那事非我力所能及。
(表示结果)当做, 作为
What did you give him in return?
你给他什么作为报答呢?
(表示目的)为了
They set off in search of the lost child.
他们出发去寻找走失的孩子。
adv.
进入, 入内
The door being opened, they came in at once.
门一打开, 他们就马上进来了。
在家, 在里面
My wife won't be in until five o'clock.
我妻子要到五点钟才在家。
到达, 来临
Is the ship in yet?
船到港了吗?
当政, 当选
This