When to Use 'AT', 'ON', and 'IN' LABELS: GRAMMAR, PREPOSITION AT - PRECISE TIME - at 1 o'clock p.m. - POINT - at the corner, at the subway station, at the bus stop - DESTINATION - at the top of the mountain - LOCATION - at the back of the department store - TIME OF THE DAY - at noon, at night - DESIGNATED SPECIFIC - The train is due at 12:15 p.m. - SPECIFIC ADDRESSES - She lives at 55 Boretz Road in Durham. ON - DAYS - on Monday - DATES - on the 1st of July - SURFACE - on the wall, on the table - PUBLIC TRANSPORTATION - on the train - DIRECTIONS - on the left, on the right - FLOORS - on the 1st floor - STREET - on Mapo Street - AVENUE - on 5th avenue - DESIGNATED DAYS AND DATES - My brother is coming on Monday. We're having a party on the Fourth of July. - DESIGNATED NAMES OF STREETS, AVENUES, ETC - Her house is on Boretz Road. IN - MONTHS - in June - YEARS -in 2008 - CENTURIES - in the 22nd century - LONG PERIODS - in 6 months - ENCLOSED SPACE - in the box, in my pocket - PRIVATE TRANSPORTATION - in a car, in a taxi, in a lift (elevator) - COUNTRIES - in America, in Korea - TIME OF THE DAY - in the morning, in the afternoon, in the evening - - He started the job in 1971 She likes to jog in the morning. It's too cold in winter to run outside. IN in bed in the bedroom in the car in the library in school AT at work at home at the library at the office at school ON on the bed on the ceiling on the floor on the horse on the plane on the train in London at the bus stop on the door in my pocket at the door on the carpet in a building at the top on a page in the garden at the exit on the menu in my wallet at the bottom on a bicycle in May at 3:00 pm on television in summer at noon on the right in 1990 at dinnertime on the left in the 1990's at bedtime on Sunday in the Ice Age at sunrise on March 6th in the past at sunset on a holiday Day in the future at the moment on my birthday in the morning at weekend