Appearance
Unit 125 — in,at,on (position) 3
A. in hospital / at work etc.
1. in bed / in hospital / in prison
We say that somebody is:
- in bed
- in hospital
- in prison
Examples:
- James isn’t up yet. He’s still in bed.
- Anna’s mother is in hospital.
2. at home / at work / at school / at university / at college
We say that somebody is:
- at home
- at work
- at school
- at university
- at college
Examples:
- I’ll be at work until 5.30.
- My sister is at university. My brother is still at school.
3. be at home / be home
We say:
be at home or be home
Both are possible when we use be:
- I’ll be home all evening.
or:
- I’ll be at home all evening.
But when we do something at home, we use at:
- Shall we go to a restaurant or eat at home?
1. in 与 at 的核心区别
这里仍然可以使用前面 Unit 123–124 的思维：
in = inside / 状态内部
at = point / 活动地点
例如：
He is in bed.
重点是处于“在床上休息/睡觉”的状态。
He is at work.
重点是他当前处于“工作地点 / 工作状态”。
B. at a party / at a concert etc.
2. at + event
We say that somebody is at an event:
- at a party
- at a conference
- at a meeting
- at a wedding
- at a concert
Examples:
- Were there many people at the party / at the meeting / at the wedding?
- I saw Steve at a conference / at a concert on Saturday.
2. 为什么活动使用 at？
对于：
party meeting wedding concert conference
英语通常把这些看成一个：
event / event point
也就是一个“事件 / 活动”。
所以使用：
at
例如：
I met her at a party.
我在一次聚会上遇到了她。
We talked about the project at the meeting.
我们在会议上讨论了这个项目。
C. in and at for buildings
4. 建筑物可以使用 in 或 at
You can often use in or at with buildings.
For example:
- eat in a restaurant
- eat at a restaurant
- buy food in a supermarket
- buy food at a supermarket
两种表达都可以，但观察角度不同。
3. at = 地点 / 活动发生地点
We usually say at when we say where an event takes place:
- We went to a concert at the National Concert Hall.
- The meeting took place at the company’s head office in Frankfurt.
- There was a robbery at the supermarket.
这里关注的是：
事情发生在哪里？
因此把建筑物看成一个：
location / point
使用：
at
4. at somebody’s house
We say at somebody’s house:
- I was at Helen’s house last night.
or:
- I was at Helen’s last night.
也就是说：
at Helen’s
本身就可以表示：
at Helen’s house / home
类似表达
We say:
- at the doctor’s
- at the hairdresser’s
etc.
例如：
I’m at the doctor’s.
我在医生那里 / 诊所。
She’s at the hairdresser’s.
她在理发店。
这里实际上省略了：
doctor’s place / surgery
hairdresser’s shop
5. in = 强调建筑物内部
We use in when we are thinking about the building itself.
Compare at and in:
at Helen’s
- I was at Helen’s (house) last night.
这里强调：
我昨晚在 Helen 家这个地点。
in Helen’s house
- It’s always cold in Helen’s house. The heating doesn’t work well.
这里强调：
Helen 家的房子内部总是很冷。
所以不能说：
It’s always cold at Helen’s house.
在这里重点是房屋内部的环境，因此：
in Helen’s house
更合适。
6. at the hotel vs in the hotel
Compare:
- We had dinner at the hotel.
- All the rooms in the hotel have air conditioning.
at the hotel
把 hotel 看成：
一个地点
例如：
We had dinner at the hotel.
我们在酒店吃了晚餐。
in the hotel
把 hotel 看成：
一个建筑内部空间
例如：
All the rooms in the hotel have air conditioning.
酒店里的所有房间都有空调。
所以：
at = location
in = inside
7. at the station / at the airport
We say:
- at the station
- at the airport
Example:
- There’s no need to meet me at the station. I can get a taxi.
这里通常把：
station / airport
看成一个：
地点 / 交通节点
所以使用：
at
例如：
I’m at the airport now.
我现在在机场。
I’ll meet you at the station.
我会在车站和你见面。
D. in and at for towns etc.
10. 城市、城镇、村庄通常使用 in
We normally use in with:
- cities
- towns
- villages
Examples:
The Louvre is a famous art museum in Paris. (not at Paris)
Sam’s parents live in a village in the south of France. (not at a village)
所以通常说：
in Shanghai
in London
in Paris
in a town
in a village
8. 为什么城市使用 in？
因为城市通常被看成一个：
area / geographical area
也就是一个地理范围。
因此：
in = within an area
例如：
I live in Shanghai.
我住在上海。
这里是：
在上海这个地理范围之内。
9. at + 城市：把城市看成旅途中的一个点
We use at when we think of the place as a point or station on a journey:
- Does this train stop at Oxford? (= at Oxford station)
这里不是说：
火车在 Oxford 城市范围里。
而是：
Oxford 是这趟旅程中的一个停靠点。
所以：
at = journey point
例如：
Does the train stop at Oxford?
这趟火车在牛津停吗？
实际上可以理解为：
Does the train stop at Oxford station?
10. in Paris vs at Oxford
比较：
The Louvre is in Paris.
卢浮宫在巴黎。
这里：
Paris = 一个地理区域
所以：
in
Does this train stop at Oxford?
这趟火车停牛津吗？
这里：
Oxford = 旅途中的一个站点
所以：
at
因此不要机械记：
城市名前永远使用 in
而应该理解：
in → 把城市看成区域
at → 把城市看成一个位置点 / 站点
E. on a bus / in a car etc.
14. 大型公共交通工具通常使用 on
We usually say:
- on a bus
- on a train
- on a plane
- on a ship
Example:
- The bus was very full. There were too many people on it.
15. car / taxi 使用 in
But we say:
- in a car
- in a taxi
Example:
- Laura arrived in a taxi.
11. 交通工具的基本规律
可以先这样记：
可以在里面走动 / 大型公共交通工具
通常：
on
例如：
on a bus
on a train
on a plane
on a ship
小型封闭交通工具
通常：
in
例如：
in a car
in a taxi
12. on a bike / motorbike / horse
We say:
- on a bike
- on a motorbike
- on a horse
Example:
- Jane passed me on her bike.
13. 为什么 bike / horse 使用 on？
因为你不是处于它们的“内部”。
而是：
骑在上面
所以使用：
on
例如：
He came on a bike.
他骑自行车来的。
She was on a horse.
她骑在马上。
14. 交通工具介词总结
| 交通工具 | 介词 | 表达 |
|---|---|---|
| bus | on | on a bus |
| train | on | on a train |
| plane | on | on a plane |
| ship | on | on a ship |
| car | in | in a car |
| taxi | in | in a taxi |
| bike | on | on a bike |
| motorbike | on | on a motorbike |
| horse | on | on a horse |
可以先记成：
on public transport
in a car / taxi
on things you ride
15. Unit 123–125 的统一空间模型
学习到这里，in / at / on 不应该再单纯按照中文“在”来记忆。
它们背后的基本模型仍然是：
| 介词 | 核心模型 | 思维 |
|---|---|---|
| in | container / area | 在内部、范围中 |
| at | point / location | 一个地点、位置点 |
| on | surface / line | 表面、线路、承载关系 |
16. in 的扩展
物理空间
in the room
in the hotel
in the car
地理区域
in Shanghai
in Paris
in a village
状态 / 制度环境
in bed
in hospital
in prison
所以 in 的核心感觉是：
inside / within
17. at 的扩展
具体位置
at the door
at the station
at the airport
活动
at a party
at a concert
at a meeting
功能性地点
at work
at school
at university
某人那里
at Helen’s
at the doctor’s
at the hairdresser’s
所以 at 的核心感觉是：
point / location / activity
18. on 的扩展
表面
on the table
on the wall
公共交通工具
on the bus
on the train
on the plane
骑乘关系
on a bike
on a motorbike
on a horse
所以 on 的核心感觉可以扩展为：
surface / supported by / aboard
19. 高频对比
at work vs in the office
I’m at work.
我在上班 / 我在工作地点。
强调：
工作这个状态或地点
I’m in the office.
我在办公室里。
强调：
办公室内部空间
at school vs in the school
My son is at school.
我儿子在上学 / 在学校。
强调：
学校的正常功能——学习
There are twenty classrooms in the school.
学校里面有 20 间教室。
强调：
建筑内部
at the hotel vs in the hotel
We had dinner at the hotel.
我们在酒店吃饭。
强调：
地点
There are 200 rooms in the hotel.
酒店里面有 200 个房间。
强调：
内部
20. 最终思维模型
遇到 in / at / on 时，可以按这个顺序判断：
① 强调“内部 / 范围”？
使用：
in
例如：
in the hotelin Parisin a car
② 强调“地点 / 活动 / 功能”？
使用：
at
例如：
at workat schoolat the airportat a party
③ 强调“表面 / 搭乘 / 骑乘”？
使用：
on
例如：
on the tableon a buson a trainon a bike
21. 一句话记住 Unit 125
in = inside / area
at = point / activity
on = surface / aboard
尤其记住这些高频表达：
in bed / in hospital / in prison
at home / at work / at school / at university
at a party / at a concert / at a meeting
in Paris / in a village
at the station / at the airport
on a bus / on a train / on a plane
in a car / in a taxi
on a bike / on a motorbike / on a horse