"Can I get your number?"
This is an example of an interrogative sentence because it asks a question. It's often also an example of wishful thinking… womp womp.
"Where did the soda go?"
We may never know, but you should know that this is an interrogative sentence. The question mark is a dead giveaway. As dead as the jerk that stole your Diet Coke.
"Should I stay or should I go?"
Here we have an interrogative sentence. It's also the title of seminal punk band The Clash's only #1 single in the UK (which, if you ask us, is a crime).