You can't accuse him of stealing unless you have proof.
- No lo puedes acusar de haber robado a menos que tengas pruebas.
Unless I leave right away, I'll be late for my appointment.
- A menos que me vaya de inmediato, llegaré tarde a mi cita.
He never speaks unless spoken to.
- Ele nunca fala a menos que falem com ele.
There will be chaos unless we all adhere to the rules.
- Haverá desordem a menos que adiramos às regras.