1 Introduction: towards a Learner Corpus Rationale 2 The Significance of Intensification 3 Methodological Considerations 4 The Adjective as Focus of Intensification 5 Closed-Class Intensifiers: a Motley Collection 6 Open-Class Intensifiers: Clearing the Ground 7 Open-Class Intensifiers and their Semantic Mechanisms 8 Learners' Adjective Intensification: Deficits and Deviations 9 Global Measures and Stylistic Differences 10 Summary and Implications References Appendices