Looking for a list of prepositions ? Look no further. Six useful rules for prepositions and how to use them. These rules will help you understand and use prepositions correctly. What is a Preposition? A preposition is a word placed before a noun or pronoun to show its connection with another word in the sentence . Prepositions often tell us about location, time, direction, and manner. For example: "The keys are on the table." Here, on shows where the keys are. Learn how to use prepositions to show relationships in space, time and logic. Find out the most common prepositions, their meanings, functions and patterns with adjectives, nouns and verbs.