Contents -- Acknowledgements -- Abbreviations and explanation of technical terms -- Introduction -- Part I: General Issues in Morphosyntactic Change -- 1. What is 'good practice' in historical linguistics: aims and methods -- 1.0. Introduction -- 1.1. What counts as evidence in historical linguistics? -- 1.2. Internal and external factors in morphosyntactic change -- 1.3. Where to find the evidence -- 1.4. Concluding remarks -- 2. Conflict and reconciliation: two theories compared -- 2.0. Introduction -- 2.1. Historical backdrop to the two approaches -- 2.2. The aims, assumptions, and methods of the two theories: a broad view -- 2.3. Reconciliation -- 2.4. Concluding remarks -- 3. Principles, mechanisms, and causes of change -- 3.0. Introduction -- 3.1. 'Factors' of change involved in the Principles and Parameters model -- 3.2. 'Factors' of change involved in grammaticalization -- 3.3. A comparison and evaluation -- 3.4. Concluding remarks -- 3.5. A sketch for an analogy-based learning mechanism for language -- Part II: Case Studies -- 4. A paradigm case: the story of the modals (and other auxiliaries) -- 4.0. Introduction -- 4.1. The English modals as a radical category change -- 4.2. The English modals: other accounts -- 4.3. The two approaches combined -- 4.4. Concluding remarks -- 5. From discourse to (morpho) syntax and vice versa: the case of clause fusion -- 5.0. Introduction: the pragmatic and the syntactic modes -- 5.1. Grammaticalization and clause combining (or clause fusion) -- 5.2. Clause fusion as a synchronic and diachronic process in generative grammar -- 5.3. Other proposals related to the question of clause fusion and the status of (modal) auxiliaries -- 5.4. The English modal verbs: biclausal or monoclausal structures? -- 5.5. The development of other auxiliaries: biclausal or monoclausal structures? -- 5.6. Concluding remarks.

6. Subjectification, scope, and word order -- 6.0. Introduction -- 6.1. Subjectification and scope: the development of epistemic modals -- 6.2. Subjectification and scope: sentence adverbs and pragmatic markers -- 6.3. Concluding remarks -- 7. Toward a usage-based theory of morphosyntactic change: summary and conclusions -- References -- Name Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- V -- W -- Y -- Z -- Subject Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X.