How do you change singular possessive noun to plural?

Answer 1

To change a singular possessive noun to a plural possessive noun, first you must change the noun from a singular noun to a plural noun. The reason for this is that plural nouns can take different forms which will determine how the plural possessive is formed. Examples:

A plural noun that ends with the letter s, just add an apostrophe after the ending s (s').

• singular noun, boy; plural noun, boys; plural possessive boys'

An irregular plural noun that does not end with s, add anapostrophes ('s) to the end of the word.

• singular noun, child; plural noun, children; plural possessive children's

Answer 2

To change a singular possessive noun to plural, add an apostrophe after the "s" of the plural form of the noun. For example, "cat's toy" becomes "cats' toys" in plural form.