Possible Results:
usare
Future subjunctive yo conjugation of usar.
usare
Future subjunctive él/ella/usted conjugation of usar.
usaré
Future yo conjugation of usar.

usar

El modificador -r simplemente no lo necesita. Si se usare, provocaría un error sintáctico.
The -r switch simply does not need them, and using them will lead to a parse error.
Word of the Day
to unwrap