There are three main rules for apostrophes: Use an apostrophe for contractions Use an apostrophe for possession (except with some possessive pronouns like its, hers, his – more details on these below) Don’t use an apostrophe for plurals (unless they are also possessive)

In grammar/writing, an apostrophe represents two main ideas: possession and contraction. Contraction: to show the omission of one or more letters in a contraction (examples: "it is = it's" or "do not = don't") Possession: to show ownership or singular possession of a noun (examples: "a boy's toy" or "the mom's purse")