Unless you hurry, we will be late. Unless Jack gets tired, we'll carry on. I won't tell him unless he asks me. Most wild animals won't attack unless they are provoked.
tylko, jeśli (w odpowiedzi na pytanie lub powiązaniu z poprzednią wypowiedzią)
He can stay as long as he wants, provided that he pays. The answer is yes, provided that the environmental conditions do not change. Europe does not lack the means, provided that it has the political will and the financial resources.
