Interrogative sentences are used to form questions. One form of an interrogative sentence is a declarative sentence followed by a question mark. In verbal communication, the final syllable of the last word of a question is pronounced with a rising pitch or intonation.
Click the pictures to hear the difference in intonation of a statement and a question.
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<Interrogative Sentence> = <Declarative Sentence>"?"
"Who" <predicate>"?"
("What" |"Which") [<adverb>* <adjective>] <noun> <predicate>"?"
["What" |"When" |"Where" |"Who" |"To whom" |"Why"] ("do" |"does" |"don't" |"doesn't" |"did" |"didn't") <subject> <predicate>"?"
"Which" [<noun phrase>] ("do" |"does" |"don't" |"doesn't" |"did" |"didn't") <subject> <predicate>"?"
["What" |"Which" |"When" |"Where" |"Who" |"To whom" |"Why"] ("will" |"won't") <subject> <predicate>"?" The verb in the predicate must follow these patterns: "have" <Vpastp> "have" "been" <Ving> "be" <Ving> <Vinf>
["What" |"Which" |"When" |"Where" |"Who" |"To whom" | "Why"] ("has" |"have" |"hasn't" |"haven't") <subject> <predicate>"?"
["What" |"Which" |"When" |"Where" |"Who" |"To whom" | "Why"] ("are" |"is" |"was" |"were" | "aren't" |"isn't" |"wasn't" |"weren't") <subject> [<adverb>* <adjective> | <prep phr>* | <predicate>]"?"