Look! Those are the black T-shirts of the sisters
Look! Those are the sisters' black T-shirts.
The sneakers of the boys are beautiful.
The boys' sneakers are beautiful.
Those are the toys of the brothers.
Those are the brothers' toys.
The boots of Tiffany are yellow.
Tiffany's boots are yellow.
The watch of Patrick is black.
Patrick's watch is black.
The shoes of the kids aren't expensive.
The kids' shoes aren't expensive.
The glasses of Elton John are pink.
Elton John's glasses are pink.
This is the cat of Mike.
This is Mike's cat.
These are the books of Mary.
These are Mary's books.
These are the flip flops of the boy.
These are the boy's flip flops.
These are the sneakers of the girl.
These are the girl's sneakers.
Those are the pants of the girls.
Those are the girls' pants.
This is the toy of Peter.
This is Peter's toy.
That isn't the doll of Jenny.
That isn't Jenny's doll.
Gertrude isn't the name of my grandma.
Gertrude isn't my grandma's name.
The skirt of your friend is blue.
Your friend's skirt is blue.
The name of my mom is Sarah.
My mom's name is Sarah.
These are the caps of my parents.
These are my parents' caps.
These aren't the shorts of the teens.
These aren't the teens' shorts.
The eyes of Betty are brown.
Betty's eyes are brown.
This is the dog of her friend.
This is her friend's dog.
These are the glasses of Henry.
These are Henry's glasses.
The cell phone of Martin is old.
Martin's cell phone is old.
This is the dog of the kids.
This is the kids' dog.