Pedir vs. Preguntar

The verbs pedir and preguntar both mean 'to ask' however, they are not interchangeable. Fortunately, the rules for using them are straightforward

Pedir: To ask for, To request, To place an order

Les pedí que me ayuden

Ya pidió

Le pediste un favor

I asked them to help me

They ordered already

You asked him for a favor


Preguntar: To ask a question or request information

Vamos a preguntar a qué hora sirven la cena

Me preguntó dónde vivo

¿Le preguntaste si tiene novia?

We are going to ask whhat time they serve dinner

He asked me where I live

Did you ask him if he has a girlfriend?