Rule to Remember
The apostrophe is used to indicate possessive case, contractions, and omitted letters. The apostrophe is not strictly a punctuation mark, but more a part of a word to indicate possessive case, contractions, or omitted letters.
What are the 3 rules for apostrophes?
The apostrophe has three uses: 1) to form possessive nouns; 2) to show the omission of letters; and 3) to indicate plurals of letters, numbers, and symbols. Do not use apostrophes to form possessive pronouns (i.e. his/her computer) or noun plurals that are not possessives.
Is it Chris's or Chris '?
The spelling Chris's, with an additional S after the apostrophe, is a more common way to write the possessive form of Chris. Most style guides, such as the Chicago Manual of Style, recommend that you use an apostrophe and an S to create the possessive form of a singular noun.