what is an apostrophe used for
Apostrophe Rules for Possessives. A lot of people get confused about when they need to use an apostrophe and when they donât. Here are a few apostrophe rules to help you decide. Use an apostrophe + S (âs) to show that one person/thing owns or is a member of something. 1  Amyâs ballet class, Lisaâs car, Robertâs car, Rossâs room, Rossâs sports teams.