The document discusses different English prepositions and their uses including:
- IN - used to indicate times, locations, and things contained within other things.
- ON - used to indicate specific dates, streets/avenues, days of the week, holidays accompanied by "day", and things located on top of other surfaces.
- AT - used to indicate times, complete addresses, expressions like night/work, holidays/commemorative dates, and specific locations.
The document provides examples of uses for each preposition and additional prepositions like among, between, from, to, etc. It includes pictures to demonstrate uses.