Direction, not position
Movement verbs express direction or destination and take a (to/toward). Static position uses en (in/at). Origin uses de (from).
Key movement verbs: ir (to go), venir (to come), llegar (to arrive), salir (to leave/go out), volver (to return).
- Voy al trabajo.I am going to work.
- ¿Adónde vais?Where are you all going? (Spain)
- Vengo de la tienda.I am coming from the shop.
- Llegamos a Barcelona mañana.We arrive in Barcelona tomorrow.
- Salgo a la calle a las ocho.I go out into the street at eight.
- Estoy en casa, pero voy a salir.I am at home, but I am going to go out.