Simple interrogatives:
* What is your name?
* Are you coming to the party?
* Did you finish your homework?
* Where is the library?
* How old are you?
Interrogatives with question words:
* Who is your favorite author?
* Why are you sad?
* When did you arrive?
* Which one do you prefer?
* How much does this cost?
Interrogatives with "yes" or "no" answers:
* Do you like pizza?
* Is it raining outside?
* Can you speak French?
* Have you ever been to Paris?
Interrogatives with tags:
* You're going to the store, aren't you?
* She's not coming, is she?
* We can start now, can't we?
These are just a few examples. Interrogative sentences are very versatile and can be used to ask all sorts of questions.