Many students often confuse when to use IN, ON and AT.
Here are some tips on when to use which.
- Months (in January, in August)
- Seasons (in the winter, in the summer)
- Years (in 1987, in 2009, in 2010)
- Periods of the day (in the morning, in the afternoon)
- Closed spaces (in a car, in a park)
- Rooms and buildings (in the Empire State Building, in the supermarket)
- Cities and countries (in New York City, in Japan)
- Dates and days (on Monday, on a rainy day, on 15th August)
- Transportation (on a bus, on a bike) *exception = car in which we use IN
- A surface (on the table, on the wall)
- Times (at 5 o´clock, at midday)
- Contexts (at school, at work)