1. Introduction; 2. Quantitative evidence for a model of the Jespersen Cycle in Middle English; 3. Distributional evidence for two types of ne: redundant negation; 4. Distributional evidence for different types of 'not'; 5. The syntax of early English Jespersen Cycle: a morphosyntactic feature-based account; 6. The role of functional change in the Jespersen Cycle; 7. Negative concord in Early English; 8. Negative inversion: evidence for a quantifier cycle in early English; 9. The loss of negative concord: interaction between the quantifier cycle and the Jespersen Cycle; 10. Conclusion.