Indefinite article in English
There are two types of articles in English - definite and indefinite. Today I’m going to talk about the indefinite article and why there are two of them, “a” and “an”. We use them in front of singular countable noun and, they mean “one”.
An apple = one apple
A car = one car
I’ve got a cat = I’ve got one cat
Remember if the countable noun is in the plural form we don't use "a" or "an". Also, we do not use this article before uncountable nouns. See some examples below: