Oh, Myung-Ki. 1999. Negative Polarity Licensing in Negated Because-clauses. Studies in Modern Grammar 15, 139-155. In this paper I`ll argue that NPI licensing in negated because-clauses can be properly accounted for, only if a causal statement can be captured as a combination of the antecedent, the consequent, and the corresponding negative counterfactual. In this context, this paper shows that NPIs in because-clauses can be explicitly licensed through the steps of derivation of the truth of negative because-clauses.