Irregular plurals are nouns that do not form the plural by simply adding -s or -es. These nouns often change their spelling in different ways, which can make them confusing for English learners.
Test your English with this irregular plurals quiz and improve your grammar by choosing the correct plural form to complete each sentence.
Choose the correct answer to complete each sentence (1–10).
1) There are many ___ swimming together.
When we talk about a group of the same animal, fish does not change in the plural.
2) The dentist checked all my ___ carefully.
The word tooth changes form in the plural, so we say teeth instead of adding -s.
3) There are many ___ playing in the park.
The plural of child is irregular and changes completely to children.
4) Many ___ attended the meeting yesterday.
People is the common plural form used to talk about a group of humans in everyday English.
5) The tree lost all its ___ in autumn.
Some words ending in -f change to -ves in the plural, like leaf to leaves.
6) The farmer found many ___ in the barn.
Mouse has an irregular plural form, so the plural changes to mice instead of adding -s.
7) We saw many ___ near the forest at sunset.
Deer has the same form in both singular and plural.
8) My ___ were tired after standing all day.
Foot changes its form in the plural, so we say feet instead of adding -s.
9) Two ___ were waiting outside the building.
Man becomes men in the plural by changing the vowel sound.
10) The chef washed all the dirty ___.
Words ending in -fe usually change to -ves in the plural, like knife to knives.
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