USING a OR an
Using a or an depends on the letter that begins the next word. So...
If a word starts with a vowel (a, e, i, o, u) we use AN
If a word starts with a consonant, we use A
Examples:
an orange a family
an elephant a teacher
an umbrella a window
If a word starts with a vowel (a, e, i, o, u) we use AN
If a word starts with a consonant, we use A
Examples:
an orange a family
an elephant a teacher
an umbrella a window