Irregular Plural Nouns worksheet for practicing converting singular nouns to their irregular plural forms.

Worksheet titled "Irregular Plural Nouns" with instructions to convert singular nouns to their irregular plural forms, featuring a list of 20 nouns and blank spaces for answers, with an example "Criterion → Criteria" and a score section at the bottom.

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Here are the correct irregular plural forms for each noun on your worksheet.

1. Man → Men
2. Foot → Feet
3. Tooth → Teeth
4. Mouse → Mice
5. Person → People
6. Deer → Deer *(The word stays the same)*
7. Child → Children
8. Woman → Women
9. Quiz → Quizzes *(Add -es because it ends in z)*
10. Tuna → Tuna *(The word stays the same, or you can use Tunas)*
11. Bacterium → Bacteria
12. Crisis → Crises
13. Series → Series *(The word stays the same)*
14. Index → Indices (or Indexes)
15. Fungus → Fungi
16. Cactus → Cacti (or Cactuses)
17. Axis → Axes
18. Datum → Data
19. Analysis → Analyses
20. Formula → Formulae (or Formulas)

Parent Tip: Review the logic above to help your child master the concept of printable irregular plural nouns worksheet.

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