Irregular Nouns Notes, Quizzes & Revision
📘 Revision Notes • 📝 Quizzes • 📄 Past Papers available in app
topic_name_replace — subject_replace
Subtopic: Irregular Nouns (for learners aged: age_replace)
Irregular nouns are nouns that do not follow the usual rule of forming plurals by simply adding -s or -es.
These notes explain the common patterns, give examples (including some Kenyan-relevant ones), show how to use them in sentences, and provide short practice tasks appropriate for age_replace.
1. What are irregular nouns?
Irregular nouns change form in unexpected ways when we talk about more than one. Instead of adding -s or -es, their spelling (and sometimes pronunciation) changes.
2. Common patterns and examples
- Vowel change: man → men, woman → women, foot → feet.
Example: A farmer (singular) → Many farmers: "The man in the shamba" → "The men in the shamba".
- Change + -en: ox → oxen.
Kenyan context: ox (used historically for ploughing) → oxen.
- No change (same singular & plural): sheep → sheep, fish → fish (often), series → series.
Example: "We saw one sheep." / "We saw ten sheep."
- Foreign/Latin forms: bacterium → bacteria, criterion → criteria, index → indices (also indexes).
In school science: "A bacterium" → "Many bacteria".
- -f / -fe → -ves: knife → knives, leaf → leaves (but note exceptions: roof → roofs).
- Two acceptable plurals: fish or fishes (both correct in different meanings), index/indexes/indices.
"Fish" is common when talking about the animal generally; "fishes" can mean different species.
3. Possessive forms with irregular plurals
Form the possessive by adding ' or 's to the plural form:
- children → the children's toys
- men → the men's meeting
- sheep → the sheep's wool (note: wool belongs to sheep)
4. Countable vs uncountable — avoid confusion
Some words are uncountable (no plural): rice, maize, milk. Do not attempt to make irregular plurals for them. Example: "I bought rice" (not "rices").
5. Quick reference table (examples)
6. How to teach and remember
- Group similar patterns (vowel change, -en, no change) and learn a few at a time.
- Use familiar Kenyan examples in sentences (e.g., mothers, children, fishermen, sheep, cattle).
- Make flashcards with singular on one side and plural on the other.
7. Practice (age_replace) — Try these
- Write the plural: 1) child 2) man 3) tooth 4) fish 5) knife
- Choose the correct word: "There are many (sheep / sheeps) in the field."
- Fill in: "A ________ (person) was at the market. Many ________ (person) came later."
- Correct the sentence if needed: "I saw three mouses in the shed."
- Form the possessive: "the toys of the children" → __________________
8. Answers
- child → children ; man → men ; tooth → teeth ; fish → fish (or fishes) ; knife → knives
- There are many sheep in the field. (sheep)
- A person was at the market. Many people came later.
- Correction: I saw three mice in the shed. (mice)
- the children's toys