Irregular Plural Nouns worksheet from Tree Valley Academy.

The task is to write the plural form of each irregular noun listed. Here are the solutions with explanations:

1. potato

- Plural: potatoes
- Explanation: Most nouns ending in "o" add "-es" for the plural form.

2. goose

- Plural: geese
- Explanation: The plural form of "goose" changes from "oo" to "ee."

3. person

- Plural: people
- Explanation: "Person" has an irregular plural form, which is "people."

4. fox

- Plural: foxes
- Explanation: Nouns ending in "x" typically add "-es" for the plural form.

5. knife

- Plural: knives
- Explanation: The plural form of "knife" changes the "f" to "v" and adds "-es."

6. zoo

- Plural: zoos
- Explanation: Nouns ending in "o" that do not have a vowel before the "o" usually just add "-s."

7. country

- Plural: countries
- Explanation: Nouns ending in "y" preceded by a consonant change the "y" to "i" and add "-es."

8. peach

- Plural: peaches
- Explanation: Nouns ending in "ch" add "-es" for the plural form.

9. piano

- Plural: pianos
- Explanation: Nouns ending in "o" that do not have a vowel before the "o" usually just add "-s."

10. army

- Plural: armies
- Explanation: Nouns ending in "y" preceded by a consonant change the "y" to "i" and add "-es."

11. elf

- Plural: elves
- Explanation: The plural form of "elf" changes the "f" to "v" and adds "-es."

12. mouse

- Plural: mice
- Explanation: The plural form of "mouse" is irregular and becomes "mice."

13. child

- Plural: children
- Explanation: The plural form of "child" is irregular and becomes "children."

14. tooth

- Plural: teeth
- Explanation: The plural form of "tooth" is irregular and becomes "teeth."

15. match

- Plural: matches
- Explanation: Nouns ending in "ch" add "-es" for the plural form.

16. party

- Plural: parties
- Explanation: Nouns ending in "y" preceded by a consonant change the "y" to "i" and add "-es."

17. class

- Plural: classes
- Explanation: Nouns ending in "s" add "-es" for the plural form.

18. key

- Plural: keys
- Explanation: Nouns ending in "y" preceded by a vowel simply add "-s."

19. foot

- Plural: feet
- Explanation: The plural form of "foot" is irregular and becomes "feet."

20. deer

- Plural: deer
- Explanation: The plural form of "deer" remains the same as the singular form.

21. box

- Plural: boxes
- Explanation: Nouns ending in "x" typically add "-es" for the plural form.

22. holiday

- Plural: holidays
- Explanation: Nouns ending in "y" preceded by a vowel simply add "-s."

23. copy

- Plural: copies
- Explanation: Nouns ending in "y" preceded by a vowel simply add "-s."

24. fish

- Plural: fish (or fishes)
- Explanation: The plural form of "fish" can remain the same or use "-es" depending on context. For collective fish, it's often "fish"; for individual fish, it can be "fishes."

25. guess

- Plural: guesses
- Explanation: Nouns ending in "ss" add "-es" for the plural form.

26. wish

- Plural: wishes
- Explanation: Nouns ending in "sh" add "-es" for the plural form.

27. cherry

- Plural: cherries
- Explanation: Nouns ending in "y" preceded by a consonant change the "y" to "i" and add "-es."

28. woman

- Plural: women
- Explanation: The plural form of "woman" is irregular and becomes "women."

Final Answer:

```
potato → potatoes
goose → geese
person → people
fox → foxes
knife → knives
zoo → zoos
country → countries
peach → peaches
piano → pianos
army → armies
elf → elves
mouse → mice
child → children
tooth → teeth
match → matches
party → parties
class → classes
key → keys
foot → feet
deer → deer
box → boxes
holiday → holidays
copy → copies
fish → fish (or fishes)
guess → guesses
wish → wishes
cherry → cherries
woman → women
```

Boxed Answer:
\boxed{
\begin{array}{ll}
\text{potato} & \text{potatoes} \\
\text{goose} & \text{geese} \\
\text{person} & \text{people} \\
\text{fox} & \text{foxes} \\
\text{knife} & \text{knives} \\
\text{zoo} & \text{zoos} \\
\text{country} & \text{countries} \\
\text{peach} & \text{peaches} \\
\text{piano} & \text{pianos} \\
\text{army} & \text{armies} \\
\text{elf} & \text{elves} \\
\text{mouse} & \text{mice} \\
\text{child} & \text{children} \\
\text{tooth} & \text{teeth} \\
\text{match} & \text{matches} \\
\text{party} & \text{parties} \\
\text{class} & \text{classes} \\
\text{key} & \text{keys} \\
\text{foot} & \text{feet} \\
\text{deer} & \text{deer} \\
\text{box} & \text{boxes} \\
\text{holiday} & \text{holidays} \\
\text{copy} & \text{copies} \\
\text{fish} & \text{fish (or fishes)} \\
\text{guess} & \text{guesses} \\
\text{wish} & \text{wishes} \\
\text{cherry} & \text{cherries} \\
\text{woman} & \text{women} \\
\end{array}
}