A Preposition is a word which shows relationship among other words in the sentence. The relationships include direction, place time, cause, manner and amount. A preposition comes before a noun or pronoun. A preposition phrase contains a preposition and object. Prepositional phrases areike idioms and are bestearned throughistening to and reading as much as possible,ittle Red Book of Prepositions is a ready reference book with a checkist of propositions.