介词at on in 怎么使用?举例几个句子,

at 用在时间上,范围小的地点上at
[æt,ət]
prep.
(表示位置) 在,于; 到达,达到; 经,由; 在…旁,靠近; 在…里; 在…上; 在…方位
He was not at his office.
他不在办公室.
(表示时间)在,在…时刻[时辰,期间,阶段,时节]; 在…岁时
The meeting will open at 15 ∶ 00.
会议在下午三点钟开始.
(表示状态)处于…状态,在…情况下
The soldiers are standing at attention.
士兵们立正站着.
(表示方式)以…的方式; 通过一次…的动作
I was there at a bound.
我纵身一跃就到了那里.
(表示原因)因为,由于; 由于有,由于应…
We were frightened at the terrible sight.
看到这可怕的景象,我们被吓呆了.
(表示距离)从,在距离…处
I saw it at a distance.
我从远处看见了它.
(表示目标)朝,向,对着
He threw the key at me.
他把钥匙丢给我.
(表示环境)出席,参加
I remember him at a banquet on that night.
我记得那天晚上他参加了一个宴会.
(表示方向)在…方面
She is good at describing things or expressing ideas.
她善于描述事物或表达思想.
on又在的意思
on
[ɔn]
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.
in是在里面的意思,有很多意思的
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,
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.
这些介词2有很多意思的,具体的要增加阅读面,多背文章,增加预感,自然就知道了.加油!