The kind of sentence that asks a question and uses a question mark: “How can I do that?”
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
How to use interrogative sentence in a sentence
If an interrogative sentence ends with a quotation, the point of interrogation stands outside the inverted commas."Stops" | Paul Allardyce
In an interrogative sentence including a Personal Pronoun and a Noun, as, co e am fear sin?Elements of Gaelic Grammar | Alexander Stewart
This interrogative sentence is introduced by the interrogative adverb why.Plain English | Marian Wharton
Every interrogative sentence should end with a question mark.Plain English | Marian Wharton
We call the second, regardless of its form, an interrogative sentence because it asks a question (interrogates).Why We Punctuate | William Livingston Klein