Ans: Here are 40 examples of possessive nouns suitable for fourth-grade students: Boy's Girl's Dog's Cat's Teacher's Student's Parent's Child's Sister's Brother's Friend's Family's Book's Desk's School's Bag's Toy's Ball's Room's House's Car's Bicycle's Shirt's Shoe's Hat's Jacket's Tree's Garden's Park's River's Ocean's Country's City's Street's Restaurant's Store's Bakery's Doctor's Nurse's Hospital's