Por qué compraste

why did you buy

→ por
phrase Rare #27,451
why did you buy Used to ask someone for the reason they bought something.
SP: ¿Por qué compraste tantos libros?
EN: Why did you buy so many books?

¿Por qué compraste esto?

Why did you buy this?

¿Por qué compraste una computadora cuando no sabes nada de ella?

Why did you buy a computer when you don’t know anything about them?

— PERFECT BLUE (1998)

¿Por qué compraste un auto como este?

Why did you buy a car like this?

¿Por qué compraste flores?

Why did you buy flowers?

¿Por qué compraste ese paraguas?

Why did you buy that umbrella?

¿Por qué compraste una flor?

Why did you buy a flower?

¿Por qué compraste un carro así?

Why did you buy a car like that?

¿Por qué compraste la misma cámara que tengo yo?

Why did you buy the same camera I have?

¿Por qué compraste este tipo de coche?

Why did you buy this kind of car?

¿Por qué compraste un diccionario tan caro?

Why did you buy such an expensive dictionary?

¿Por qué compraste las flores?

Why did you buy the flowers?