not possible
No es posible hacer dos cosas a la vez.
It’s not possible to do two things at once.
No es posible trepar ni a las paredes ni a la viga.
It is not possible to climb either the walls or the beam.
— Contratiempo (2017)
Esto no es posible sin la ayuda de Tom.
This isn't possible without Tom's help.
Tom y Mary dicen que creen que no es posible.
Tom and Mary say they think it isn't possible.
I know it's not possible.