I won't go with you unless you tell me where we're going.
- No iré contigo a menos que me digas adónde vamos.
I won't be able to finish it unless I receive your help.
- No podré terminarlo a menos que tenga tu ayuda.
There will be chaos unless we all adhere to the rules.
- Haverá desordem a menos que adiramos às regras.
He never speaks unless spoken to.
- Ele nunca fala a menos que falem com ele.