“Usa la fuerza, pero no olvides limpiar el lado oscuro.” Funny saying in a bathroom, for any Star Wars fans.

My question is, if they say “olvides” (YOU forget) why don’t they also say “Usas”? Why is it “Usa” and not “Usas la fuerza”?

Question

“Usa la fuerza, pero no olvides limpiar el lado oscuro.” Funny saying in a bathroom, for any Star Wars fans.

My question is, if they say “olvides” (YOU forget) why don’t they also say “Usas”? Why is it “Usa” and not “Usas la fuerza”?

Answer

A positive second person command uses the same form as the third person indicative. A negative second person command uses the second person subjunctive.