The document introduces the indefinite articles 'a' and 'an', explaining their usage based on the sounds of the following noun. 'A' is used before consonantal sounds, while 'an' is used before vowel sounds, applicable only in singular form. Examples of each article with corresponding nouns are provided for clarification.

1. North Star Idiomas
Class 03
Introducing the
Articles
Érico Damada

2. The Articles “A/An”The Articles “A/An”
We use the indefinite article “a” before
nouns with a consonantal sound. And
the article “an”, before vowel sounds.
IMPORTANT POINT: It’s used only on
the singular form.
Let’s see the following exemples:

3. ExemplesExemples
A Donut A Hamburger
A Cookie A Lemon

4. The Article “An”The Article “An”
An Egg An Orange
An Ice Cream An Apple