This document provides information about different types of articles in English grammar - indefinite articles "a" and "an", and the definite article "the". It explains that "a" is used before words starting with consonants, "an" is used before words starting with vowels, and "the" refers to specific or particular nouns. Examples are given for the use of each article. The document concludes with self-check questions to help the reader understand when to use "a", "an", and "the" in sentences.