This document provides an overview of definite, indefinite, and zero articles in English. It defines each type of article and provides examples of their use. The definite article "the" refers to specific nouns. The indefinite articles "a" and "an" refer to general nouns and the speaker/listener does not know the specific noun. The zero article is used with plural countable nouns and uncountable nouns when talking about abstract ideas or generalizing descriptions. Examples are provided to illustrate the appropriate use of each article.