1 This periphrasis is mainly used in present indicative and shows that:
- Something is on the point of occurring.
¡Te vas a caer, cuidado!
Deja ese martillo tranquilo que te vas a hacer daño.
- Something is someone’s intention.
Voy a llamar al jefe.
Vamos a solucionar el problema del paro.
2 In imperfect indicative, this periphrasis is used in the speech of the past with the former values.
Le dije que nos íbamos a caer.
Le dije que iba a llamar al jefe.