When a noun is singular, add an apostrophe and an -s ('s) to the end of the word to make it a singular possessive noun.

book cover → book’s cover

lizard tail → lizard’s tail


When a noun is plural and ends with an –s, add an apostrophe after the –s (s') to make it a plural possessive noun.

clowns red noses → clowns’ red noses

girls dresses → girls’ dresses


When a noun is plural but does not end with an –s, add an apostrophe and an –s ('s) to make it a plural possessive noun.

men → men’s pants

children → children’s friends