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 year the Conservative Party is in.
今年保守党执政。
正当时令, 正当流行
Honey peaches are in now and we can eat them every day.
现在水蜜桃正上市, 我们每天都可以吃到。in
[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 year the Conservative Party is in.
今年保守党执政。
正当时令, 正当流行
Honey peaches are in now and we can eat them every day.
现在水蜜桃正上市, 我们每天都可以吃到。


on
prep.
(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。
(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。
(表示方向)向, 往, 朝; 沿着, 顺着
They marched on the enemy's fortress.
他们向敌人的要塞进军。
(表示状态)系于, 悬于; 附于
A picture hangs on the wall.
墙上挂着一幅画。
(表示方式)乘, 坐, 骑
She will leave on an early train.
她将乘早班火车离开。
(表示对象)对, 对于, 碰在, 对…造成困难
There is much to be said on both sides.
公说公有理, 婆说婆有理。
(表示原因)由于, 因为
The old worker retired on account of age.
老工人因年老而退休。
(表示比较)与…相比
Today's weather is an improvement on yesterday's.
今天的天气比昨天的好。
(表示方位)在…方位
The town stands on the left bank of the river.
该镇坐落在河的左岸。
adv.
(放, 穿, 连接)上
He has new shoes on.
他穿上新鞋。
向前, (继续)下去
She worked on quietly all night.
她整个晚上默默地继续工作。