[GIU] UNIT112 In/at/on (Position) 3

​​​UNIT122
​​In/at/on (Position) 3

​​​A. ​At home/ in the hospital, etc.
We say that somebody is ​at home/ at work:
I'll be ​at work until 5:30, but I'll be ​at home all evening.

You can also say ​be/ stay home (without at):
You can stop by anytime. I'll ​be home all evening.

We say that somebody is ​in the hospital/ in prison/ in jail:
Sofia works ​in the hospital.

You can be ​at or ​in school/ college. Use ​at school/ college to say where someone is:
Kong is not living at home. She's away ​at college.

But use ​in school/ college to say what someone is doing:
Kim works at a library her brother is in medical school. (= he's studying medicine)

​​​B. ​At a party/ at a concert, etc.
We say that somebody is ​at an event (​at a party/ at a conference,etc.):
Were there many people ​at the party/ ​at the meeting​/ at the wedding?
I saw Twice ​at a drama award/ at a concert on Saturday.

​​​C. ​In and ​at for buildings
You can often use ​in or ​at with buildings. For example, you can eat ​in a restaurant or ​at a restaurant; you can buy something ​in a supermarket or ​at a supermarket. We usually say at when we say where an event takes place (for example, a concert, a movie, a party, a meeting):
We went to a concert ​at Olympic stadium.
The meeting took place ​at the company's headquarters in Seoul.

We say ​at the station/ at the airport:
I lost my purse ​at the airport.

We say ​at somebody's house:
I was ​at Sofia's house last night. or I was ​at Sofia's last night.
Also ​at the doctor's, at the hairdresser's, etc.

We use ​in when we are thinking about the building itself. Compare:
We had dinner ​at the hotel. but
All the rooms ​in the hotel have air conditioning. (not at the hotel)
I was ​at Sofia's (​house) last night. but
It's always cool ​in Sofia's house. The heating doesn't work very well. (not at Sofia's house)

​​​D. ​In and ​at for towns, etc.
We normally use ​in with cities, towns, and villages:
Sam's parents live ​in Sydney. (not at Sydney)
The Louvre is a famous art museum ​in Paris. (not at Paris)

But you can use ​at or ​in when you think of the place as a point or station on a trip:
Does this train stop ​at (or in) ​Daegu? (= at the Daegu station)
We stopped ​at (or ​in) ​a small ​town on the way to O world.

​​​E. ​On a bus/ in a car, etc.
We usually say ​on a bus/ on a train/ on a plane/ on a ship but ​in a car/ in a taxi:
​The bus was very full. There were too many people ​on it.
Mary arrive ​in a taxi.

We say ​on a bike (= bicycle)/ ​on a motorcycle​/ on a horse:
Ahn passed me ​on his bike.