Question

What part of grammar indicates an unspecified person or thing?

Answer 1

Answer:

An indefinite article adjective (a or an) indicates an unspecified person or thing.

Explanation:

If I said, "Hand me a pen." The "a" in the sentence signals that I will accept any pen, hence unspecified. However, a definite article adjective indicates a specified person or thing (the). "Hand me the pen" is a different sentence because "the" indicates a specific pen.