3. Use an Apostrophe Without -s for Possessives of Most Plural Nouns To form the possessive of a plural noun that already ends in -s, add an apostrophe:
•the girls' swing set (the swing set belonging to the girls) •the students' projects (the projects belonging to the students) •the Johnsons' house (the house belonging to the Johnsons)
If the plural noun does not end in -s, add an apostrophe plus -s: •the women's conference (the conference belonging to the women) •the children's toys (the toys belonging to the children) •the men's training camp (the training camp belonging to the men)
