I-IV -- Acknowledgments -- Contents -- Abbreviations -- 1. Introduction -- 2. Aspect and actionality in the Spanish Perfective Progressive -- 3. Aspect and actionality in the grammaticalization of the Romance Progressive -- 4. The interaction of aspect and actionality in some other Romance periphrases -- 5. Motion auxiliaries and actional restrictions -- Conclusion -- Notes -- Sources of material -- References -- Index of subjects -- Empirical Approaches to Language Typology