An article indicates that a noun will follow.
Articles modify nouns.
Articles connect words and phrases in a sentence.
An article always comes before a predicate in a sentence.
For, and, nor, but, or, yet, so
I, me, you, she, he, her, him, it
A, an, the
To, at, on, up, of, in, by
Count and non-count
Definite and indefinite
Direct and indirect
Dependent and independent
It is the beautiful day.
Let's go on picnic.
Is there a lake in the Central Park?
It is a beautiful day for a picnic by the lake in Central Park.