Printable worksheet for practicing singular and plural nouns, featuring a list of common nouns with blank spaces for students to write the plural forms.

Let's solve the task of converting singular nouns to their plural forms.

We'll go through each noun and apply the standard English pluralization rules. Some follow simple rules (add -s or -es), while others are irregular or have special cases.

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🔹 General Rules for Plural Nouns:

1. Most nouns: Add -s
Example: pen → pens
2. Nouns ending in -s, -sh, -ch, -x, -z: Add -es
Example: brush → brushes
3. Nouns ending in -y preceded by a consonant: Change -y to -ies
Example: baby → babies
4. Nouns ending in -f or -fe: Often change to -ves
Example: leaf → leaves (not applicable here)
5. Irregular plurals: These don’t follow standard rules
Examples: child → children, mouse → mice, man → men

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Now let’s fill in the Plural column for each item:

| Singular | Plural | Singular | Plural |
|--------------|--------------|--------------|----------------|
| 1. pen | pens | 11. butterfly | butterflies |
| 2. pencil | pencils | 12. photo | photos |
| 3. book | books | 13. video | videos |
| 4. chair | chairs | 14. hand | hands |
| 5. table | tables | 15. eye | eyes |
| 6. window | windows | 16. brush | brushes |
| 7. bed | beds | 17. peach | peaches |
| 8. shoe | shoes | 18. baby | babies |
| 9. bus | buses | 19. candy | candies |
| 10. box | boxes | 20. octopus | octopuses / octopi |

> ✔ Note: "Octopus" has two accepted plural forms:
> - octopuses (most common and standard)
> - octopi (from Latin root, but often considered incorrect by some)
> - octopodes (rare, technical)

For this exercise, we’ll use octopuses as it is the most widely accepted.

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✔ Final Answer Table:

| Singular | Plural | Singular | Plural |
|--------------|--------------|--------------|----------------|
| 1. pen | pens | 11. butterfly | butterflies |
| 2. pencil | pencils | 12. photo | photos |
| 3. book | books | 13. video | videos |
| 4. chair | chairs | 14. hand | hands |
| 5. table | tables | 15. eye | eyes |
| 6. window | windows | 16. brush | brushes |
| 7. bed | beds | 17. peach | peaches |
| 8. shoe | shoes | 18. baby | babies |
| 9. bus | buses | 19. candy | candies |
| 10. box | boxes | 20. octopus | octopuses |

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📝 Explanation Summary:

- Most regular nouns just add -s or -es.
- Words ending in -y after a consonant become -ies (e.g., baby → babies).
- Words like butterfly, photo, video, etc., follow regular patterns.
- Octopus is tricky — though octopi is sometimes used, octopuses is safest and clearest for general use.

✔ This completes the task!