1. The problem is to correctly write possessive forms of given nouns and pronouns. 2. The rule for singular possessive nouns is to add an apostrophe + s: for example, "man's" from "man". 3. For plural possessive nouns ending in s, add only an apostrophe: for example, "families'" for multiple families. 4. For plural possessive nouns not ending in s, add apostrophe + s: for example, "children's". 5. For possessive pronouns like "hers," "yours," "mine," no apostrophe is used. 6. Applying these rules: - "the families yards" becomes "families' yards" because "families" is plural and possessive. - "my teachers desk" becomes "teachers' desk" because "teachers" is plural possessive. - "the mans hat" becomes "man's hat" because "man" is singular possessive. - "my brothers toothbrushes" becomes "brothers' toothbrushes" because "brothers" is plural possessive. - "the girls bicycle" becomes "girl's bicycle" because "girl" is singular possessive. 7. Remember, possessive pronouns like "hers," "yours," "mine" never use apostrophes. Final answers: 8. families' 9. teachers' 10. man's 11. brothers' 12. girl's