Overview
Most English nouns have two forms: singular (one) and plural (more than one). Regular plurals follow predictable spelling rules. Learning these rules—and the most common exceptions—is an essential foundation for accurate English grammar.
1. Regular Plural Rules
| Noun ending |
Rule |
Singular → Plural |
| Most nouns |
Add -s |
book → books, car → cars |
| -s, -ss, -sh, -ch, -x, -z |
Add -es |
bus → buses, watch → watches |
| Consonant + -y |
Change y → ies |
city → cities, baby → babies |
| Vowel + -y |
Add -s |
day → days, key → keys |
| -f / -fe |
Change f → ves |
leaf → leaves, wife → wives |
| -o (most) |
Add -es |
tomato → tomatoes, hero → heroes |
| -o (music/foreign) |
Add -s |
piano → pianos, photo → photos |
2. Spelling Practice
| Singular |
Plural |
Rule applied |
| box |
boxes |
-x → add -es |
| church |
churches |
-ch → add -es |
| country |
countries |
consonant + y → -ies |
| knife |
knives |
-fe → -ves |
| potato |
potatoes |
-o → add -es |
| radio |
radios |
-o (music) → add -s |
3. Irregular Plurals (Most Common)
Some nouns change their internal vowel or use a completely different form. These must be memorised.
| Singular |
Plural |
| man |
men |
| woman |
women |
| child |
children |
| person |
people |
| tooth |
teeth |
| foot |
feet |
| mouse |
mice |
| goose |
geese |
Some nouns are identical in both forms.
| Noun |
Singular |
Plural |
| sheep |
one sheep |
five sheep |
| fish |
one fish |
five fish |
| deer |
one deer |
five deer |
| species |
one species |
two species |
5. Nouns Used Only in Plural
These nouns have no singular form and always take a plural verb.
| Noun |
Example |
| trousers |
My trousers are too long. |
| scissors |
The scissors are on the table. |
| glasses |
Her glasses were broken. |
| news |
The news is good. (always singular verb!) |
6. Common Mistakes
| Mistake |
Correction |
Explanation |
| childs |
children |
Irregular plural |
| peoples |
people |
"People" is already plural |
| informations |
information |
Uncountable — no plural |
| tooths |
teeth |
Irregular plural |
| The scissors is... |
The scissors are... |
Always plural verb |
| Two sheeps |
Two sheep |
Same form |
7. Real-World Examples
- There are three children in the family.
- I need new glasses — I can't read the menus.
- The leaves on the trees turn yellow in autumn.
- Two women and five men attended the classes.
Summary
| Type |
Rule |
Example |
| Regular |
Add -s or -es |
book → books |
| -y ending |
y → ies (consonant+y) |
city → cities |
| -f/-fe ending |
f/fe → ves |
leaf → leaves |
| Irregular |
Must memorise |
child → children |
| Same form |
No change |
sheep → sheep |
| Plural only |
Always plural verb |
trousers are... |