A / An


‘A’ and ‘An’ are determiners.

They are both used when –

You are talking about ‘Only ONE’ – person, place or thing.  

But, you are ‘NOT specifying – exactly which particular’ person, place or thing you are referring to.

For example

I bought a new car.

He bought an old car.


The only difference is

A – is used before words starting with a consonant sound. &

An – is used before words starting with a vowel sound.


EXAMPLES

A  (before consonant sound)

  • I bought a new book.
  • Can you give me a pen?
  • Please send me a message.

An  (before vowel sound)

  • I bought an interesting book.
  • Can you give me an apple?
  • Please send me an email.