What is a common characteristic of an interrogative sentence?

An interrogative sentence is designed to ask a question, and a key characteristic of such sentences is that they often begin with a question word. Common question words include "who," "what," "where," "when," "why," and "how." These words signal to the reader or listener that a question is being posed, prompting a response or further thought on the topic.

While some interrogative sentences can be structured differently, such as beginning with auxiliary verbs ("Is," "Are," "Do," etc.), the presence of a question word is a clear and defining feature that helps identify the sentence as interrogative. This is essential in understanding the purpose and function of these types of sentences in communication.