This document provides examples and rules for using possessive case in English. It explains that to indicate possession, an apostrophe (') is added to the possessor noun or pronoun. For plural possessors ending in "s", only the apostrophe is added. For singular possessors ending in "s", both an apostrophe and "s" are added. It also addresses compound possessors, double or triple possession cases, omitting the possessed object, and using possession for times, places, and personified nouns. The document concludes with an exercise transforming sentences to use possessive case.