There are three articles: the adjectivesa,
an and the. The is called the definite article as it is used to indicate something specific;
whereas, a and an are called the indefinite articles
as they are used to indicate something unspecific.
Examples:
I fell over the
chair again. (a specific chair, i.e., one known to the
reader)
Can
you pass me a chair. (an unspecific
chair - i.e., any chair)
Interactive example:
I'm not a
bitch. I'm the bitch! [show
me the articles]