Let’s go through each sentence one by one. The task is to change the singular noun in parentheses into its correct
irregular plural form.
Remember: Irregular plurals don’t just add “-s” or “-es”. They change completely — like “child” → “children”, “mouse” → “mice”, etc.
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1. I have ten ______ (scarf) in my closet
→ “Scarf” becomes “scarves” (not scarfs — though sometimes accepted, “scarves” is more common and expected here).
✔ scarves
2. Kim has two ______ (child) aged two and five
→ “Child” → “children”
✔ children
3. I brush my ______ (tooth) in the morning
→ “Tooth” → “teeth”
✔ teeth
4. Cats like to chase ______ (mouse)
→ “Mouse” → “mice”
✔ mice
5. Two ______ (half) make a whole
→ “Half” → “halves”
✔ halves
6. There are several ______ (ox) on the road
→ “Ox” → “oxen”
✔ oxen
7. Three ______ (man) wearing masks entered the bank
→ “Man” → “men”
✔ men
8. Deer and ______ (moose) are still found in the state
→ “Moose” stays “moose” (same singular and plural!)
✔ moose
9. The way to catch ______ (mouse) is to set a trap
→ Again, “mouse” → “mice”
✔ mice
10. We saw a flock of ______ (goose) in the lake
→ “Goose” → “geese”
✔ geese
11. There are always more ______ (fish) in the sea
→ “Fish” can stay “fish” (plural same as singular), OR “fishes” if talking about different species — but for general use, “fish” is fine. In this context, it’s likely expecting “fish”.
✔ fish
12. My brother is six ______ (foot) three inches tall
→ “Foot” → “feet”
✔ feet
13. People say that a cat has nine ______ (life)
→ “Life” → “lives”
✔ lives
14. The horses’ ______ (hoof) needs to be cleaned
→ “Hoof” → “hooves” (sometimes “hoofs”, but “hooves” is standard irregular plural)
✔ hooves
15. The customer wants four ______ (loaf) of bread
→ “Loaf” → “loaves”
✔ loaves
16. The ______ (thief) were caught by the police
→ “Thief” → “thieves”
✔ thieves
17. Eagles fly alone, but ______ (sheep) flock together
→ “Sheep” stays “sheep” (same singular and plural)
✔ sheep
18. I can see ______ (person) walking across the street
→ “Person” → “people” (though “persons” exists, “people” is the usual irregular plural)
✔ people
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Final Answer:
1. scarves
2. children
3. teeth
4. mice
5. halves
6. oxen
7. men
8. moose
9. mice
10. geese
11. fish
12. feet
13. lives
14. hooves
15. loaves
16. thieves
17. sheep
18. people
Parent Tip: Review the logic above to help your child master the concept of irregular plural nouns worksheet 4th grade.
