 the properties of learner language which are characteristic and indicative of L2 proficiency at each level of the Common European Framework of Reference for Languages (CEFR).The second volume in the series, "Language Functions Revisited"  by Antony Green, introduces the theoretical and empirical bases for defining English language learning levels in functional ‘Can-Do’ terms.The Cambridge English Profile Corpus (CEPC) is a corpus of learner English produced by students worldwide, and is being built by Cambridge University Press and the Cambridge English Language Assessment, in collaboration with a network of participating educational establishments across the world.