Irregular Plural Nouns worksheet for practice, featuring words like potato, goose, and child with blank lines for answers.

Let's solve the Irregular Plural Nouns worksheet step by step.

We are asked to write the plural form of each given noun. These are irregular plurals, meaning they do not follow the standard rule of adding "-s" or "-es".

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✔ Here are the correct plural forms:

| Singular | Plural | Explanation |
|--------|---------------|-----------|
| potato | potatoes | Add "-es" (words ending in "o" that are not from Latin/foreign origin often take "-es") |
| match | matches | Regular plural: add "-es" |
| goose | geese | Irregular: "goose" → "geese" |
| party | parties | Regular: add "-ies" (after "y" preceded by consonant) |
| person | people | Irregular: "person" → "people" |
| class | classes | Regular: add "-es" |
| fox | foxes | Regular: add "-es" |
| key | keys | Regular: add "-s" |
| knife | knives | Change "f" to "v", add "-es" |
| foot | feet | Irregular: "foot" → "feet" |
| zoo | zoos | Regular: add "-s" |
| deer | deer | Same in singular and plural |
| country | countries | Regular: add "-ies" (after "y" preceded by consonant) |
| box | boxes | Regular: add "-es" |
| peach | peaches | Regular: add "-es" |
| holiday | holidays | Regular: add "-s" |
| piano | pianos | Regular: add "-s" |
| copy | copies | Regular: add "-ies" |
| army | armies | Regular: add "-ies" |
| fish | fish or fishes | "Fish" is sometimes used as both singular and plural, but "fishes" is used when referring to different species |
| elf | elves | Irregular: "elf" → "elves" |
| guess | guesses | Regular: add "-es" |
| mouse | mice | Irregular: "mouse" → "mice" |
| wish | wishes | Regular: add "-es" |
| child | children | Irregular: "child" → "children" |
| cherry | cherries | Regular: add "-ies" |
| tooth | teeth | Irregular: "tooth" → "teeth" |
| woman | women | Irregular: "woman" → "women" |

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✔ Final Answer List:

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

> ⚠️ Note: For "fish", both "fish" and "fishes" are acceptable depending on context:
> - Use "fish" for general reference (e.g., "I caught three fish").
> - Use "fishes" when referring to multiple species (e.g., "The aquarium has many different fishes").

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✔ This completes the worksheet! Let me know if you'd like a printable version or explanation of the rules behind these irregular plurals.