Irregular Plural Nouns worksheet for practicing correct usage of irregular plural forms in sentences.

Here’s the completed worksheet with the correct answers circled (as requested), along with a clear explanation for each:

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Irregular Plural Nouns — Correct Answers & Explanations

1. The (foots, feet) on the girl were dirty.
✔ Correct: feet
*Explanation:* “Foot” is an irregular noun. Its plural is feet, not “foots”.

2. Every school has many (children, childs).
✔ Correct: children
*Explanation:* “Child” becomes children in plural — an irregular form. “Childs” is incorrect.

3. She was missing her two front (tooths, teeth).
✔ Correct: teeth
*Explanation:* “Tooth” → teeth (irregular plural). “Tooths” is not standard English.

4. The two (mouses, mice) are eating cheese.
✔ Correct: mice
*Explanation:* “Mouse” → mice (irregular). “Mouses” is sometimes used for computer devices, but for animals, it’s always “mice”.

5. The school of (fish, fishes) is in the lake.
✔ Correct: fish
*Explanation:* “Fish” can be both singular and plural when referring to the same species. “Fishes” is used only when talking about multiple *types* of fish. Here, it’s one school → so fish is correct.

6. Three (woman, women) are talking.
✔ Correct: women
*Explanation:* “Woman” → women (irregular plural). “Womans” or “woman” (singular) don’t fit here.

7. Many (persons, people) walk to work.
✔ Correct: people
*Explanation:* “People” is the common plural of “person”. While “persons” is grammatically correct in legal/formal contexts, “people” is standard and natural here.

8. The (leaves, leafs) fall off the tree in fall.
✔ Correct: leaves
*Explanation:* “Leaf” → leaves (irregular plural). “Leafs” is incorrect unless you’re talking about the Toronto Maple Leafs sports team.

9. There are three (moos, men) standing outside.
✔ Correct: men
*Explanation:* “Man” → men (irregular). “Moos” is not a word — perhaps a typo? The correct plural of “man” is “men”.

10. We bought two (loafs, loaves) of bread.
✔ Correct: loaves
*Explanation:* “Loaf” → loaves (irregular plural). “Loafs” is incorrect.

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✔ Final Answer Key (Circled Options):
1. feet
2. children
3. teeth
4. mice
5. fish
6. women
7. people
8. leaves
9. men
10. loaves

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📌 Teaching Tip: Irregular plurals don’t follow the normal “add -s” rule. They must be memorized. Common patterns include vowel changes (foot→feet, man→men), consonant changes (child→children), or completely different forms (mouse→mice).

Let me know if you’d like a printable version or flashcards for these!