Singular and plural

We use a plural noum for different things, like trousers, pyjamas, glasses, binoculars, scissors.

I left my pyjamas in Ibiza.

My sun glasses are broken.

My news trousers are reds.

Diferents noums haven diferents words for singular and plural. Foot-feet, tooth-teeth, man-men, woman-women, child-children, person-people.

The children go to school every day.

This child has blue eyes.

Many people go to work by bus.

Countables and uncountables

Countable noums can be singular and plural, and can use numbers.
Uncountable noums have only one form, and cannot use numbers.

I have seven sisters.
My mother has a cat and two dogs.
I read a paper every day.

She likes rice.
They drink a lot of coffee.
I bought paper to write a letter.