|IN a country, state, city||IN year, month|
|ON a street||ON day, date|
|AT a place||AT (clock) time|
In many languages, there is only one preposition for the above situations. In English there are three. Just remember that IN usually indicates the “largest” time or place, and AT usually indicates the “smallest” time or place. ON is between the two.
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Q: Where’s your office?
A: In Taipei, Taiwan.
Q: Really? What part of Taipei?
A: It’s on Chung Shan North Road.
Q: I know that area. Where exactly is it?
A: It’s at 105 Chung Shan North Road, next to the bookstore.
Q: When is the wedding?
A: It’s in June.
Q: What day?
A: It’s on Saturday, the 25th.
Q: What time?
A: It starts at 6:00.
|at the swimming pool (on site)||in the swimming pool (in the pool itself i.e. in the water)|
|at the post office/bank (general)||in the post office/bank (inside the building)|
|at the zoo (visitors, general area)||in the zoo (animals in their cages)|
|at school||in the classroom|
For school, prison, and church, the is used to indicate the building. No article indicates the general situation. Note the following:
|in school (studying, listening to teacher, etc.)||in school (studying, listening to teacher, etc.)|
|in jail/prison (staying there as a criminal)||in the jail/prison (temporary)|
|in the school (building)||in the school (building)|
|in church (attending services)||in the church (fixing the windows)|
|at church||at the church|
|in prison (He committed a crime.)||at the prison (visiting his friend)|