were in/at/on
Mary y Tom estaban en shock cuando vieron a Oliver volver con su primer tatuaje.
Mary and Tom were in shock when they saw Oliver return with his first tattoo.
Creí que los Murphy estaban en Florida.
I thought the Murphys were in Florida.
— Solo en casa (1990)
Tom y Mary estaban en perfecta sintonía.
Tom and Mary were perfectly in sync.
Nuestros planes para el fin de semana estaban en suspenso.
Our plans for the weekend were on hold.
Todos los jugadores estaban en su posición.
All the players were in their positions.
Estaban en México.
They were in Mexico.
Los trenes no estaban en servicio debido a la nieve.
The trains were not running due to the snow.
Las montañas estaban en todos los alrededores de la ciudad.
The mountains were all around the city.
Las tropas estaban en formación de combate.
The troops were in combat formation.