Singular and Plural in English: Why Asian Students Get It Wrong (And How to Fix It)
Published 21 June 2026
“I have three book.” “She gave me an information.” “The childrens are playing.”
Plural errors appear constantly in English essays from Chinese-speaking students — and for good reason. In Chinese, nouns don’t change form when there’s more than one. “一本書” (one book) and “三本書” (three books) use the same word 書, with the number doing all the work. The English habit of adding -s, changing the word form, or not changing it at all (for irregular and uncountable nouns) is genuinely unnatural for Chinese speakers.
The rules aren’t difficult once they’re organised clearly — the problem is that most students have never seen them laid out systematically. This guide does exactly that.
The Basic Rule: Regular Plurals
Most English nouns form their plural by adding -s:
- book → books, chair → chairs, student → students, day → days
But several spelling patterns change slightly:
| Noun ending | Plural rule | Examples |
|---|---|---|
| -s, -sh, -ch, -x, -z | add -es | bus → buses, dish → dishes, watch → watches, box → boxes |
| consonant + -y | change -y to -ies | baby → babies, story → stories, city → cities |
| vowel + -y | add -s | day → days, toy → toys, key → keys |
| -f or -fe | change to -ves (mostly) | leaf → leaves, knife → knives, half → halves |
| -o | add -s or -es (varies) | photo → photos, hero → heroes, piano → pianos |
The most common error is forgetting -s entirely. The second most common is applying -s where -es is needed (e.g., “watchs” instead of “watches”).
Irregular Plurals: The Ones That Must Be Memorised
Some nouns change their form entirely in the plural. There’s no shortcut — these must be learned individually:
| Singular | Plural |
|---|---|
| child | children |
| man | men |
| woman | women |
| foot | feet |
| tooth | teeth |
| mouse | mice |
| goose | geese |
| person | people |
| fish | fish (usually unchanged) |
| sheep | sheep (unchanged) |
| deer | deer (unchanged) |
Common error: Adding -s to an already-plural irregular form.
-
Wrong: “The childrens are happy.”
-
Right: “The children are happy.”
-
Wrong: “Two mans came to the door.”
-
Right: “Two men came to the door.”
Uncountable Nouns: The Biggest Source of Confusion
Uncountable nouns are things that can’t be counted individually — they exist as a mass or concept. In English, uncountable nouns:
- Have no plural form (no -s)
- Cannot be preceded by “a” or “an”
- Take singular verb agreement (“Water is important”, not “Water are important”)
The problem for Chinese-speaking learners is that many nouns that are countable in Chinese (or feel countable) are uncountable in English.
Common uncountable nouns that students wrongly pluralise:
| Wrong | Right | Why |
|---|---|---|
| ”an information” / “informations” | information | uncountable |
| ”a furniture” / “furnitures” | furniture | uncountable |
| ”a homework” / “homeworks” | homework | uncountable |
| ”an advice” / “advices” | advice | uncountable |
| ”a luggage” / “luggages” | luggage | uncountable |
| ”a equipment” / “equipments” | equipment | uncountable |
| ”a progress” / “progresses” | progress | uncountable |
| ”a knowledge” / “knowledges” | knowledge | uncountable |
| ”a news” / “newses” | news | uncountable — “the news is” not “the news are” |
How to express quantity with uncountable nouns: Use a counter word + “of”:
- “a piece of information”, “two pieces of advice”
- “a piece of furniture”, “an item of luggage”
- “a bit of progress”
Subject-Verb Agreement With Plural Nouns
Getting the plural right also means getting the verb right. When the subject is plural, the verb must match:
- “The student is late.” (singular subject → singular verb)
- “The students are late.” (plural subject → plural verb)
For uncountable nouns: always singular verb.
- “The furniture is old.” (not “are”)
- “Information is important.” (not “are”)
Tip for your child: If they’ve decided a noun is plural, they should also check that the verb matches. The two errors often come together — “three book are on the table” has both a missing -s and the wrong verb form.
A Four-Step Checking Routine for Plural Errors
Ask your child to do this pass specifically before submitting any essay:
- Find every noun in the essay.
- Ask: is there more than one? If yes, does it have the correct plural form?
- Is it countable or uncountable? Uncountable nouns should have no -s and no a/an.
- Check verb agreement: Does the verb form match whether the subject is singular or plural?
This sounds like a lot, but after a few practice rounds it becomes fast. The goal is to build automatic awareness — not to make every essay a grammar drill.
Frequently Asked Questions
My child writes “informations” constantly. How do I explain it’s wrong?
Tell them: in English, you can’t count information the way you count books. You can’t say “one information, two informations” — just like you can’t say “one water, two waters.” When you want to say there’s more than one piece of information, you say “pieces of information.” This kind of explanation (connecting to how you’d naturally say it) tends to stick better than just saying “it’s wrong.”
Are there nouns that are countable in one meaning but uncountable in another?
Yes. “Experience” as a general concept is uncountable (“She has a lot of experience”), but a specific event is countable (“She had some interesting experiences on the trip”). “Work” as effort is uncountable (“I have a lot of work to do”), but a creative work is countable (“She painted three works”). For school essays, the uncountable sense is much more common and is where errors typically occur.
My child puts -s on adjectives too. Is that a thing?
No — adjectives don’t change for plural in English. “Two talls men” is wrong; “two tall men” is right. This error is less common but does appear. If you see it, simply explain: in English, only nouns get plural -s, not the words that describe them.
What about “fish” — is it “fish” or “fishes”?
“Fish” is the standard plural when referring to fish as a species or food: “We caught five fish.” “Fishes” is used in specific scientific or literary contexts to refer to multiple species: “The river has many different fishes.” For school essays, “fish” is almost always the right choice.
How do I know if a noun is countable or uncountable?
The most reliable test: can you put a number in front of it naturally? “One book, two books” — yes, countable. “One homework, two homeworks” — this sounds wrong, so it’s uncountable. A good learner’s dictionary (like Oxford or Cambridge online) will mark each noun as countable (C) or uncountable (U) — this is the definitive reference when you’re unsure.
GrammarEasy flags plural errors and uncountable noun mistakes in your child’s essays, with explanations in Chinese for each error type. Download free on the App Store.