We use the Indefinite Article – a or an – when we talk about:
He is an artist and his wife is a plumber.
He is a Buddhist and his wife is an atheist.
He is an American and she is a Swede.
We never use the indefinite article with non-countable nouns…
There are three types of Articles in English. Put simply, we use articles to let people know what kind of noun we’re talking about.
Take the word, fly, for example. If I just use the word on its own I’m speaking very generally.
These flies are annoying me.
If I put an Indefinite Article before it, I’m talking about a single fly but I’m not bothered about…