This dissertation contributes to the study of English as a lingua franca in business negotiations with focus on the pragmatic functions of conditionals. Is there a regularity to the use of conditionals? What functions do different forms of conditionals have in lingua franca English business negotiation? The author uses business encounters recorded at an international music trade fair as her data. She applies a corpus analysis and a qualitative-interpretative approach and shows that different conditionals are used to indicate different degrees of commitment.