Articles: a/an

a /an

• Use a/an with singular nouns.
• Use an with a noun beginning with a vowel.
• Use a with nouns beginning with u, when this u sounds /ju:/, for example: unit

EXERCICES:

• The indefinite article - a/an - Exercise 1
• The indefinite article - a/an - Exercise 2  
• The indefinite article - a/an