To request information or an answer from someone. verb
She decided to ask her teacher about the homework.
He asked if he could borrow the car for the weekend.
To request someone to do something or to request permission for something. verb
I will ask him to help us with the project.
They asked for permission to leave early.
To invite someone to an event or to do something. verb
She asked him to the dance.
He asked her out for dinner.
To inquire about the price or availability of something. verb
I asked how much the dress costs.
He asked if the book was still available.