Abstract 1. Introduction 2. An Empirical Study 2.1. The Test 2.2. Results and Discussions 3. Capturing the generalizations on Atypical Case Particles 3.1. Systematicity of Atyical Case Particles 3.2. The Nature of the Constraint Verb Types 3.3. Aspectuality and Accusative Adverbials: Measure Phrases 4. Concluding Remarks References