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