Articles a/an

1. A

1.1. The article "A" is used before singular, countable nouns which begin with consonant sounds.

2. Examples "a"

2.1. I’m a architecture student

2.1.1. I’m Mario. I’m a reporter

2.2. I saw a really beautiful eagle at the zoo

2.3. He is a teacher

3. Example

4. An

4.1. The article "AN" is used before singular, countable nouns which begin with vowel sounds.

5. Examples "an"

5.1. an lion

5.2. He is an excellent student

5.3. He is an teacher.