What is an interrogative adverb?

The interrogative adverbs are “when,” “where,” “why,” and “how.” They are used to ask questions about time, location, reason, or manner (e.g., “Where do you want to go for dinner?”).

These words are known as interrogative adverbs because the answers they prompt are adverbs, adverb phrases, or adverb clauses.

Interrogative adverbs are part of a larger group of words referred to as “interrogatives.” These words (typically starting with “wh-”) are used to form questions.