Use the possessive case e.g. jack,car jack’s car jane,bill, ball jane,bill’s ball jane,bill, books jane’s,bill’s books cups,cat the cat’s cups tails, dogs the dogs’ tails mice,noses the mice’s noses 1. bob, toy 2. sam,car 3. cat, nose 4. sally,books 5. mike, father 6. tom, sam,book 7. mary,dot ,doll 8. peter,john ,car 9. jill, susan, toy 10. mother, father, house 11. will, helen, rats 12. tim, ivan, umbrellas 13. polly, ann, sam, toys 14. david, fanny, greg, jane, balls 15. zack,lin,nancy, exercise-books 16. birds, house 17. tigers, cage 18. hens, chickens 19. clowns, tricks 20. frogs, eyes 21. goose, house 22. geese,nests 23. hamsters, carrot 24. lion, food 25. crocodiles,teeth 26. men,hats 27. children, toys 28. women, photos

1. Bob`s toy
2. Sam`car
3. cat`s nose
4. Sally`s books
5. Mike`s father
6. Tom and Sam`s book (предмет принадлежит нескольким лицам)
7. Mary and Dot`s doll
8. Peter and John`s car
9. Jill and Susan`s toy
10. mother and father`s house
11. Will`s and Helen`s rats ( предмет принадлежит  каждому из лиц  в отдельности)
12. Tim`s and Ivan`s umbrellas 
13. Polly`s,Ann`s, Sam`s toys 14. David`s,Fanny`s,Greg`s,Jane`s balls15. Zack`s,Lin`s Nancy`s`, exercise-books 
16. birds` house
17. tigers`cage
18. hens` chickens
19. clowns` tricks  
20. frogs` eyes
21. goose`s house
22. geese` nests 
23. hamsters`s carrot
24. lion`s food
25. crocodiles` teeth
26. men`s hats
27. children`s toys
28. women`s photos