Here are some examples:
* Why are you here? (Asking for the reason someone is in a specific place)
* Why did you do that? (Asking for the reason someone did a specific action)
* Why is the sky blue? (Asking for the reason for a natural phenomenon)
It's important to note that "why" is not always used literally to ask for a reason. Sometimes it can be used to express surprise, confusion, or frustration.
For example:
* Why, that's so kind of you! (Expressing surprise and gratitude)
* Why, I never thought I'd see you here! (Expressing surprise and excitement)
* Why, this is just awful! (Expressing frustration)
Let me know if you have any other questions!