Nouns are words or names for persons, places, things or ideas.
Articles: A or An
A in front of consonant sounds: a cat, a dance, a young boy
An in front of vowel sounds: an animal, an apple, an old man
Singular or plural: Common nouns change form when there are two or more.
Most nouns have the ending -s in plural:
a rat – two rats
Some nouns have the ending -es in plural:
a box – two boxes
Some nouns change their ending from -y to -ies in plural:
a story – many stories
Some nouns are irregular. They change form in plural:
a man – two men
a child – two children
a mouse – three mice
Proper nouns are written with a capital letter, because they are names of particular persons or places, like William, Sarah, New York and Norway.