Originally Posted by Ockham
Example 1: "Bill, did you take out the garbage?"
This is an example of a QUESTION. A query is being made asking if Bill completed a task.
Example 2: "Bill just cannot handle taking out the garbage and no matter how many times I ask him to take out the garbage he never seems to do it and I end up doing it and I'm tired of taking out the garbage."
This is an example of a complaint.
I hope you can reference this post for future use when you get confused.