possessive adjectives : Everything English
www.everythingenglishblog.comThe possessive forms of plural nouns are formed in one of two ways. When the plural of the noun in question ends in “s” (e.g. dogs, girls, books), possessives are formed by adding an apostrophe after the “s”. No additional “s” is necessary. For example: The dogs’ owners were away on vacation. We don’t know the girls’ names.