📘 Regular and Irregular Nouns --- One-Page A4 Notes
British English · Plural rules + examples + common mistakes
1️⃣ What is a Noun?
A noun /naʊn/ names a person, place, thing, animal, or idea.
Nouns can be countable or uncountable.
- Countable --- can be counted: a book, two books
- Uncountable --- cannot be counted: water, information
2️⃣ Regular Plural Nouns
Regular nouns form the plural in a predictable way.
| Rule | Example |
|---|---|
| Add -s | book → books , car → cars |
| Add -es after s, x, ch, sh, o | bus → buses , box → boxes , watch → watches , dish → dishes , potato → potatoes |
| Consonant + y → change y to i + -es | city → cities , baby → babies |
| Vowel + y → add -s | boy → boys , day → days |
| Some f / fe → -ves | knife → knives , wife → wives , leaf → leaves |
| But some just add -s | roof → roofs , chief → chiefs |
3️⃣ Irregular Plural Nouns
Irregular nouns do not follow the normal rules. You must memorise them.
| Singular | Plural |
|---|---|
| man | men |
| woman | women |
| child | children |
| tooth | teeth |
| foot | feet |
| mouse | mice |
| goose | geese |
| person | people |
Some nouns do not change:
| Singular | Plural |
|---|---|
| sheep | sheep |
| fish | fish (usually) |
| deer | deer |
| series | series |
| species | species |
Some nouns from Latin / Greek:
| Singular | Plural |
|---|---|
| analysis | analyses |
| crisis | crises |
| phenomenon | phenomena |
| datum | data |
| medium | media |
4️⃣ Uncountable Nouns
Uncountable nouns have no plural form . They take a singular verb.
Common examples:
water, milk, rice, bread, information, advice, furniture, homework, traffic, news.
✅ some information
✅ a piece of advice
✅ a lot of furniture
❌ informations, advices, furnitures, homeworks
5️⃣ Common Mistakes
| Wrong | Correct | Reason |
|---|---|---|
| two childs | two children | Irregular plural |
| three mans | three men | Irregular plural |
| many informations | a lot of information | Uncountable |
| two sheeps | two sheep | No change |
| some advices | some advice / pieces of advice | Uncountable |
| two foots | two feet | Irregular plural |
| new furnitures | new furniture | Uncountable |
✅ One-Sentence Summary
Regular nouns form plurals with -s, -es, -ies, or -ves; irregular nouns change in special ways or do not change at all; uncountable nouns have no plural form.
Printable · Copyable · Best kept on your desk
Teacher's Script: Regular and Irregular Nouns
Time: About 8--10 minutes
Level: Beginner to Elementary
Topic: Regular and irregular plural nouns
1. Greeting and Warm-up (1 minute)
Teacher:
Good morning, everyone. Today we are going to learn about regular nouns and irregular nouns.
Actually, to be more precise, we are going to talk about regular plural nouns and irregular plural nouns .
A noun /naʊn/ names a person, place, thing, animal, or idea.
Most nouns can become plural. How they change tells us if they are regular or irregular.
Look at these two examples:
- one book → two books
- one child → two children
In the first example, we simply add -s . That is a regular noun .
In the second example, the word changes completely. That is an irregular noun.
Today we will learn the rules for both.
2. Regular Plural Nouns (2 minutes)
Teacher:
Let's start with regular nouns .
A regular noun forms its plural in a predictable way.
(Write on the board.)
Regular plural rules:
-
Add -s to most nouns.
book → books
car → cars
dog → dogs
-
Add -es after s, x, ch, sh, o .
bus → buses
box → boxes
watch → watches
dish → dishes
potato → potatoes
-
Consonant + y → change y to i and add -es .
city → cities
baby → babies
study → studies (noun: study → studies)
-
Vowel + y → just add -s .
boy → boys
day → days
toy → toys
-
Some nouns ending in f / fe → change to -ves .
knife → knives
wife → wives
leaf → leaves
wolf → wolves
But be careful: some just add -s .
roof → roofs
chief → chiefs
belief → beliefs
Teacher:
So regular nouns follow clear rules. You can usually predict the plural form.
Repeat after me:
book → books
box → boxes
city → cities
knife → knives
(Students repeat.)
3. Irregular Plural Nouns (2.5 minutes)
Teacher:
Now let's look at irregular nouns .
These nouns do not follow the normal rules. You have to memorise them.
(Write on the board.)
Common irregular plurals:
- man → men
- woman → women
- child → children
- tooth → teeth
- foot → feet
- mouse → mice
- goose → geese
- person → people
Some nouns do not change at all:
- sheep → sheep
- fish → fish (usually; fishes means different species)
- deer → deer
- series → series
- species → species
Some nouns come from Latin or Greek:
- analysis → analyses
- crisis → crises
- phenomenon → phenomena
- datum → data
- medium → media
Teacher:
These are very common in academic English, so they are useful to know.
Repeat after me:
man → men
child → children
tooth → teeth
sheep → sheep
analysis → analyses
(Students repeat.)
4. Uncountable Nouns (1 minute)
Teacher:
One more important point: some nouns are uncountable .
They do not have a plural form.
Examples:
water, milk, rice, information, advice, furniture, homework, traffic, news.
We do not say:
❌ informations
❌ advices
❌ furnitures
❌ homeworks
We say:
✅ some information
✅ a piece of advice
✅ a lot of furniture
✅ a lot of homework
Teacher:
So remember: countable nouns can be regular or irregular. Uncountable nouns have no plural form.
5. Common Mistakes (1 minute)
Teacher:
Let's correct some common mistakes together. I will say the wrong form. You say the correct one.
-
Wrong: two childs
Correct: two children
-
Wrong: three mans
Correct: three men
-
Wrong: many informations
Correct: a lot of information
-
Wrong: two sheeps
Correct: two sheep
-
Wrong: some advices
Correct: some advice / pieces of advice
-
Wrong: two foots
Correct: two feet
(Students repeat the correct forms.)
Teacher:
Remember: irregular nouns change in special ways, and uncountable nouns do not change at all.
6. Quick Practice (1 minute)
Teacher:
Now let's practise. Give me the plural form of these nouns.
- book
- box
- city
- child
- man
- tooth
- sheep
- information
- analysis
- woman
(Students answer. Teacher corrects.)
Answers:
- books
- boxes
- cities
- children
- men
- teeth
- sheep
- information (uncountable)
- analyses
- women
7. Summary and Homework (30 seconds)
Teacher:
Let's summarise.
Regular nouns form plurals with -s , -es , -ies , or -ves .
Irregular nouns change in special ways, like man → men , child → children , tooth → teeth .
Some nouns do not change, like sheep → sheep .
And uncountable nouns have no plural form, like information , advice , and furniture.
Your homework:
Write ten nouns: five regular and five irregular.
Write their plural forms.
Then write one sentence for each plural noun.
That's all for today. Thank you, everyone. See you next class!
End of Teacher's Script