A: Used when the following word does not begin with a vowel sound.
An: Used when the following word does start with a vowel sound.
Example Sentences: A cat was in my yard today. Would you like an apple? I saw a unicorn.
A: Used when the following word does not begin with a vowel sound.
An: Used when the following word does start with a vowel sound.
Example Sentences: A cat was in my yard today. Would you like an apple? I saw a unicorn.