1. singular 單數

2. dog a

3. pencil a

4. book a

6. plural 複數

7. Rule 1

8. dog

9. dogs

10. pencil

11. pencils

12. book

13. books

14. sock

15. socks

16. Rule 1 ： s dogs pencils books socks

17. ants

18. flowers

19. Rule 2

20. candy

21. candies

22. baby

23. babies

24. cherry

25. cherries

26. Rule 2 ： y ies candy  candies baby  babies cherry  cherries

27. butterflies

28. lady ladies

29. Rule 3

30. glass

31. glasses

32. dish

33. dishes

34. church

35. churches

36. box

37. boxes

38. glasses dishes churches boxes Rule 3 ： s/sh/ch/x es

39. class  classes bush  bushes lunch  lunches tax  taxes

40. Rule 4

41. thief

42. thieves

43. wife

44. wives

45. thief  thieves wife  wives Rule 4 ： f/fe ves

46. leaf

47. leaves

48. Rule 1 ： s Rule 2 ： y ies Rule 3 ： s/sh/ch/x es Rule 4 ： f/fe ves