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Báo cáo khoa học: "Learning How to Conjugate the Romanian Verb. Rules for Regular and Partially Irregular Verbs"

In this paper we extend our work described in (Dinu et al., 2011) by adding more conjugational rules to the labelling system introduced there, in an attempt to capture the entire dataset of Romanian verbs extracted from (Barbu, 2007), and we employ machine learning techniques to predict a verb’s correct label (which says what conjugational pattern it follows) when only the infinitive form is given. | Learning How to Conjugate the Romanian Verb. Rules for Regular and Partially Irregular Verbs Liviu P. Dinu Faculty of Mathematics and Computer Science University of Bucharest ldinu@fmi.unibuc.ro Vlad Niculae Faculty of Mathematics and Computer Science University of Bucharest vlad@vene.ro Octavia-Maria Sulea Faculty of Foreign Languages and Literatures Faculty of Mathematics and Computer Science University of Bucharest mary.octavia@gmail.com Abstract In this paper we extend our work described in Dinu et al. 2011 by adding more con-jugational rules to the labelling system introduced there in an attempt to capture the entire dataset of Romanian verbs extracted from Barbu 2007 and we employ machine learning techniques to predict a verb s correct label which says what con-jugational pattern it follows when only the infinitive form is given. 1 Introduction Using only a restricted group of verbs in Dinu et al. 2011 we validated the hypothesis that patterns can be identified in the conjugation of the Romanian partially irregular verb and that these patterns can be learnt automatically so that given the infinitive of a verb its correct conjugation for the indicative present tense can be produced. In this paper we extend our investigation to the whole dataset described in Barbu 2008 and attempt to capture beside the general ending patterns during conjugation as much of the phonological alternations occuring in the stem of verbs apophony from the dataset as we can. Traditionally Romanian has received a Latin-inspired classification of verbs into 4 or sometimes 5 conjugational classes based on the ending of their infinitival form alone Costanzo 2011 . However this infinitive-based classification has proved itself inadequate due to its inability to account for the behavior of partially irregular verbs whose stems have a smaller number of allomorphs than the completely irregular during their conjugation. There have been thus numerous attempts throughout the history of Romanian .