Найдите ошибку sheep children mouses men

Sheep sheep.

Children a child.

 Mouses mice a mouse

Men a man.

Noun has singular and plural. We make plural with the help of s or es.

A table two tables.

A window windows.

When nouns ends in s, ss, sh, ch, x, o we add es.

A bus buses.

A fox foxes.

We dont add s or es when noun is irregular.

A man, a woman, a mouse, a goose, a tooth, a foot are irregular nouns.

There are nouns which have the same form for plural and for singular. These nouns are deer, sheep.