Prepositions are words that specify place, direction, and time. There are three types of prepositions.
Time Prepositions - Time prepositions define time. Time prepositions - In - At - On For - During - While
Place Propositions - Place prepositions clarify the place someone or somebody. Place Prepositions - In - On -At
Direction Prepositions - Direction prepositions are used to clarify the direction of someone or something. Examples: under, over, right, left etc.