UNDEFINED ARTICLES A, AN.

What is the indefinite article A and AN in English?
It is a word that refers to something that is not specific. Look at the following example:


I need a pencil / I need a pencil

In this sentence someone needs ONE pencil. Not a specific pencil, rather any pencil in the world.

Meaning of Ay AN
The meaning of these words in Spanish is the same: ONE or ONE. We should use these words in the singular only.

The meaning of this article is not, and I repeat is not, ONE or ONE. Examples:

She has a bicycle / Ella tiene una bicicleta
She has a brother / Ella tiene un hermano

When to use a and when to use an?

the use of one word or another is related to the word they accompany in the sentence. Moreover, the use of "a" or "an" depends entirely on the noun to which they will refer, and it is the beginning of that noun that will determine whether you will use "a" or if you will use "an".