Here are some key characteristics of interrogative sentences:
* They usually begin with a question word: who, what, when, where, why, how, which.
* They often have a different word order than declarative sentences: The verb usually comes before the subject.
* They aim to elicit information from the listener or reader.
Examples:
* Who is going to the party?
* What time does the movie start?
* When will you be back?
* Where did you find that?
* Why are you leaving?
* How did you do that?
* Which one do you want?
Note: Some interrogative sentences don't start with question words but still function as questions:
* Are you coming to the party?
* Do you like pizza?
These sentences use auxiliary verbs like "are" or "do" to form questions.