Singular and Plural Nouns worksheet for grammar practice.

The task is to convert singular nouns to plural and plural nouns to singular. Below is the solution with explanations for each conversion.

Singular to Plural:

1. power → powers
- Regular plural: Add "-s".

2. dragon → dragons
- Regular plural: Add "-s".

3. file → files
- Regular plural: Add "-s".

4. charm → charms
- Regular plural: Add "-s".

5. whiteboard → whiteboards
- Regular plural: Add "-s".

6. wish → wishes
- Regular plural: Add "-es" (because it ends in a silent "sh").

7. empty → empties
- Regular plural: Add "-es" (because it ends in a silent "y").

8. fax → faxes
- Regular plural: Add "-es" (because it ends in "x").

9. daisy → daisies
- Regular plural: Add "-ies" (because it ends in "y" preceded by a consonant).

10. disc → discs
- Regular plural: Add "-s".

11. phone → phones
- Regular plural: Add "-s".

12. spy → spies
- Irregular plural: Change "y" to "i" and add "-es".

13. key → keys
- Regular plural: Add "-s".

14. enemy → enemies
- Irregular plural: Change "y" to "i" and add "-es".

15. reality → realities
- Regular plural: Add "-ies" (because it ends in "y" preceded by a consonant).

16. critic → critics
- Regular plural: Add "-s".

17. backpack → backpacks
- Regular plural: Add "-s".

18. fox → foxes
- Regular plural: Add "-es" (because it ends in "x").

19. apostrophe → apostrophes
- Regular plural: Add "-es" (because it ends in "e").

Plural to Singular:

20. beach → beach
- Already singular.

21. staple → staple
- Already singular.

22. trench → trench
- Already singular.

23. penny → penny
- Already singular.

24. company → company
- Already singular.

25. dinner → dinner
- Already singular.

26. gallery → gallery
- Already singular.

27. girl → girl
- Already singular.

28. sky → sky
- Already singular.

29. gas → gas
- Already singular.

30. library → library
- Already singular.

31. atrocity → atrocity
- Already singular.

32. keyboard → keyboard
- Already singular.

33. party → party
- Already singular.

34. club → club
- Already singular.

35. lunch → lunch
- Already singular.

36. match → match
- Already singular.

37. bush → bush
- Already singular.

38. branch → branch
- Already singular.

Final Answer:

```
(1) power → powers
(2) dragon → dragons
(3) file → files
(4) charm → charms
(5) whiteboard → whiteboards
(6) wish → wishes
(7) empty → empties
(8) fax → faxes
(9) daisy → daisies
(10) disc → discs
(11) phone → phones
(12) spy → spies
(13) key → keys
(14) enemy → enemies
(15) reality → realities
(16) critic → critics
(17) backpack → backpacks
(18) fox → foxes
(19) apostrophe → apostrophes

(20) beach → beach
(21) staple → staple
(22) trench → trench
(23) penny → penny
(24) company → company
(25) dinner → dinner
(26) gallery → gallery
(27) girl → girl
(28) sky → sky
(29) gas → gas
(30) library → library
(31) atrocity → atrocity
(32) keyboard → keyboard
(33) party → party
(34) club → club
(35) lunch → lunch
(36) match → match
(37) bush → bush
(38) branch → branch
```

This completes the worksheet. Each noun has been correctly converted based on standard English grammar rules for singular and plural forms.