Possessive Nouns

the car of John

• Johns' car

• Johns car

• John's car

the room of the girls

• girl's room

• girls' room

• girls's room

the boat of the sailors

• the sailors' boat

• the sailor´s boat

• the sailors's boat

the bicycle of joshua

• joshuas' bicycle

• joshua's bicycle

• joshuas's bicycle

Change to a possessive noun: 
emperor

• emperor's

• emperors'

Change to a possessive noun:
warriors

• warriors's

• warriors'

Change to a possessive noun: 
weapons

• weapons'

• weapons's

the book of the teacher

• teacher's book

• teachers book

• teachers' book

• teacher book

the house of the family

• familys' house

• family's house

• families house

• families' house

the toys of the children

• children's toys

• childrens' toys

• childrens toys

• children toy's