The children's toys.
The toys of the children.
The backpacks of the students.
The students' backpacks.
Steve's t-shirt.
The shirt of Steve.
The students' books.
The books of the students.
The keys of my father.
My father's keys.
The desks of the classroom.
The classroom's desks.
John's TV.
The TV of John.
The jacket of my brother.
My brother's jacket.
The computer's screen.
The screen of the computer.
My dog's food.
The food of my dog.
The shoes of my sister.
My sister's shoes.
The car of my parents.
My parents' car.
My sister's room.
The room of my sister.