Noun
common
countable
singular
a + consonant
a cat
an + vowel
an apple
plural
five umbrellas
Exceptions
a man - men, a woman - women, a tooth - teeth, a goose - geese, an ox - oxen, a child - children
uncountable
milk
proper
Name of people
Miley, Peter, Alex
Name of place
New York, Paris, Moscow
Name of things
Twilight, Crayola, Channel
Language
English, Russian, French, Greek
Name of ideas
Buddhism, Romanticism
Syntactic role in the sentence
Subject
Object