Plural

1. Regular:

General rule: singular + S:

girl - girls
boy - boys
Nouns ending in -S, -SS, -SH, -CH, -X get -ES:

box - boxes
bus - buses
Some nouns ending in -O behind a consonant get -ES:

potato - potatoes
tomato - tomatoes
Nouns ending in -Y behind a consonant change -Y into -IES:

lady - ladies
baby – babies

Some nouns ending in -F or -FE change -F(E) into -VES:

knife - knives
wife - wives

2. Irregular learn them by heart:

Man                     men
Foot                     feet
Woman                women
Tooth                   teeth
Goose                  geese
Mouse                 mice
Louse                  lice
Child                   children
Penny                  pence

 

3. Always singular, always plural:

Some nouns are always plural:

Clothes, jeans, trousers, shorts, people,
police, glasses, scissors, mathematics

Some nouns (abstract, materials, and kinds of food) are always singular:

Bread, tea, cheese, jam, soup, soap, snow, cotton,
wood, water, information, advice, knowledge, furniture

Some nouns have the same form for singular and plural:

Names of kind of fish: cod, herring, salmon, trout...
Names of some animals: deer, sheep, swine, ...