List of Prepositions

A Simple Rule for Prepositions

Prepositions of Place
at the bus stop, in the box, on the wall

Prepositions of Time
at Christmas, in May, on Friday

A preposition is a word governing, and usually coming in front of, a noun or pronoun and expressing a relation to another word or element, as in:

• She left before breakfast.
  
  
• What did you come for?
  (For what did you come?)