Apostrophes

Use an apostrophe

  • To form the possessive case of nouns. For singular nouns, add an apostrophe and an s, even if the noun ends in s, x, or z. To form the possessive of plural nouns that end in s, add only an apostrophe.
    Examples
    insider's guide
    the box's contents
    the CSS's flexibility
    Berlioz's opera
    an OEM's product
    users' passwords
    the Joneses' computer

  • To indicate a missing letter in a contraction.
    Examples
    can't
    don't
    it's

Don’t use an apostrophe

  • For the possessive form of it.
    Example
    Replace a formula with its calculated value.

  • With a possessive pronoun.
    Example
    The choice is yours.

  • To form the plural of a singular noun.
    Example
    Play your favorite games on all your devices.

Note Don't use the possessive form of Microsoft trademarks and product, service, or feature names.