why don't we … / why don't you … us
¿Por qué no nos diste la harina que utilizas en el obrador, Flora?
Why didn't you give us the flour you use in the bakery, Flora?
— El guardián invisible (2017)
¿Por qué no nos contás que pasó anoche?
Why don’t you tell us what happened last night?
¿Por qué no nos has presentado?
Why haven't you introduced us?
"¿Por qué no nos avisaste antes que tenías ganas?""Es que me dio pena."
“Why didn’t you tell us sooner that you were in the mood?” “I was just embarrassed.”
Why didn't you let us know?