Using “A” or “An” Before a Noun in Research Articles

This podcast discusses when to use indefinite articles and which one to use. There are two indefinite articles in English: “a” and “an.” The word indefinite as related to grammar means something that has not been identified, is generic, or is an unfamiliar person or thing. You use an indefinite article when you are introducing new information, when the reader does not know exactly which noun you are referring to, or when the noun is not unique.

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