Articles in Grammar
Articles help mark how a noun phrase is being presented. “A/an” introduce an indefinite singular count noun in many contexts, while “the” marks definite reference; English also has contexts where no overt article is used.
English articles are “a,” “an,” and “the.” “A/an” are indefinite articles and “the” is the definite article; article choice also depends on countability, number, specificity, and zero-article patterns.
Key details
Important caveats
Scope Boundary
Article choice is not exhausted by a simple definite/indefinite rule: plural and uncountable nouns, names, institutions, and fixed expressions can use zero article or special patterns.
Further guidance
Application
Choose “a” or “an” by the following sound, not simply by the written first letter of the next word.
Core Rule
Use “a/an” for many indefinite singular count-noun references and “the” for definite reference when the intended referent is identifiable in context.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- A/an and the — Cambridge Grammar (opens in a new tab)Cambridge University Press · Cambridge Grammar evidence for “a/an” as indefinite articles and “the” as the definite article.