must be
It must be around here.
Alguien debe de estar detrás de esto.
Someone must be behind this.
Debe de estar en la tienda de mascotas.
It must be at the pet store.
She must be dead.
Seguramente está en tu casa, debe de estar por el suelo.
It's probably in your house, it must be on the floor.
— Durante la tormenta (2018)
Mi hermano debe de estar enfermo.
My brother must be sick.