ARTICLES

A, an or the?

When do we say "the dog" and when do we say "a dog"?

The end "a/an" are called "articles". We divide them into "definite" and "indefinite" like this:

Articles

 Definite Indefinite the a, an

We use "definite" to mean sure, certain. "Definite" is particular.

We use "indefinite" to mean not sure, not certain. "Indefinite" is general.

When we are talking about one thing in particular, we use the. When we are talking about one thing in general, we use a or an.

Think of the sky at night. In the sky we see 1 moon and millions of stars. So normally we would say:

I saw the moon last night.

I saw a star last night.