Respuesta :
Answer: adding 's to the singular.
Examples:
To say you use
The car of Bob Bob's car.
The book of Mary Mary's book
Examples:
To say you use
The car of Bob Bob's car.
The book of Mary Mary's book
In Modern English nouns the genitive case is commonly shown by
adding an ´s to the singular, for example:
The neighbor´s cat is sitting on the floor;
adding an s´ to the plural, for example:
Our friends´ cars are parked in front of the restaurant.