Articles a/an

1. The indefinite adjectives are those that we used to refer to any object , without indicating in particular. The most common indefinite articles are a and an.

2. explication

3. The indefinite article ( a) be used before words beginning with a consonant or consonant sound

3.1. A book

3.2. A house

3.3. A computer

4. a

5. an

6. the indefinite article ( an ) be used before words beginning with a vowel or vowel sound.

6.1. An umbrella.

6.2. an apple

6.3. An envelope