when to use article A ?

Hi Diana! When you talk about singular nouns or noun groups wich refer to only a one person or thing...that start with a consonant letter. Example: A BOOK A PERSON A WAITER Go to the link and you will see more about this subject. Good luck! Hello English Article 24519:Articles - A, An, The https://helloenglish.com/article/24519/Articles-A-An-The