Regular -s and -es rules, the most common irregular plurals, and the exceptions native speakers use without thinking, explained clearly with exam practice.
📖 Reading time: ~8 minutes✅ Reviewed by a CELTA-qualified teacher🎯 Covers A1 to A2
Most English plurals just need an -s added, but a small group of extremely common nouns break every rule, child becomes children, not childs, and these exceptions show up constantly in everyday speech. This guide covers the regular rules, the irregular forms worth memorising, and the nouns that don't behave like normal plurals at all.
leaf → leaves, knife → knives, wolf → wolves (but roof → roofs, an exception)
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The -f/-fe rule has real exceptions
Not every word ending in -f follows the -ves pattern: roof → roofs, chief → chiefs, belief → beliefs. There's no shortcut here, these need to be learned individually alongside the general rule.
"News" takes a singular verb
Despite ending in -s, "news" is treated as singular: "The news is on at six," not "the news are." This surprises many learners since it looks structurally identical to a regular plural.
6. Common Mistakes
❌ Incorrect
✅ Correct
Why
I have two childs.
I have two children.
"Child" has an irregular plural, "childs" doesn't exist.
There are many mans here.
There are many men here.
"Man" becomes "men," not "mans."
My trousers is on the chair.
My trousers are on the chair.
"Trousers" is always plural and needs a plural verb.
I saw three sheeps in the field.
I saw three sheep in the field.
"Sheep" is unchanging, the plural has no -s.
7. Exercises
A. Gap Fill — Give the correct plural form (8 questions)
1. One child, two ___.
2. One box, two ___.
3. One city, two ___.
4. One mouse, two ___.
5. One leaf, two ___.
6. One sheep, two ___.
7. One boy, two ___.
8. One tooth, two ___.
Show Answers (A)
1. children 2. boxes 3. cities 4. mice 5. leaves 6. sheep 7. boys 8. teeth
B. Multiple Choice (5 questions)
1. Two ___. (a) mans (b) men
2. Three ___. (a) potatoes (b) potatos
3. My ___ are new. (a) glasses (b) glass
4. Two ___. (a) knifes (b) knives
5. The news ___ good today. (a) is (b) are
Show Answers (B)
1.b 2.a 3.a 4.b 5.a
C. Error Correction (4 questions)
1. I have two childs.
2. There are many mans here.
3. My trousers is on the chair.
4. I saw three sheeps in the field.
Show Answers (C)
1. I have two children. 2. There are many men here. 3. My trousers are on the chair. 4. I saw three sheep in the field.
D. Freer Practice — Write Your Own Sentences (2 tasks)
1. Write a sentence using an irregular plural noun.
2. Write a sentence using an always-plural noun (trousers, scissors, glasses).
Show Answers (D)
Model answers will vary. Examples: 1. "My feet hurt after the long walk." 2. "I need new glasses, mine are broken."
8. Mini Quiz
9. Exam Focus — Cambridge, IELTS, SELT
Exam
How This Is Tested
Sample Question
Cambridge A2 Key / B1 Preliminary
Correct plural forms are directly assessed in the Writing paper's mark scheme.
"There were three ___ (child) playing in the park." (children)
IELTS Writing
Accurate plurals, especially irregular ones, affect the Grammatical Range and Accuracy score.
Correctly writing "people," not "peoples," when describing a general population.
Trinity GESE/ISE (SELT)
Plural accuracy comes up constantly when describing family, objects and daily life.
"I have two children" used naturally when talking about family.
10. Frequently Asked Questions
Add -s to most nouns (cat, cats). Add -es to nouns ending in -s, -ss, -sh, -ch, -x or -z (box, boxes). These two rules cover the large majority of English nouns.
If a consonant comes before the -y, change y to i and add -es (city, cities). If a vowel comes before the -y, just add -s (boy, boys).
A group of very common, old English nouns have irregular plurals inherited from earlier forms of the language: child/children, man/men, mouse/mice, foot/feet. These simply need to be memorised.
Some nouns are identical in singular and plural form, most often animal names: one sheep, two sheep; one fish, two fish (though "fishes" exists for multiple species).
Yes — nouns describing two-part items are always plural and take a plural verb: trousers, scissors, glasses. "My trousers are on the chair," never "is."
Yes, indirectly — accurate plurals come up constantly when describing family, objects and daily life, and subject-verb agreement with plurals is assessed throughout the interview.
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