Word order in Portuguese gerund clauses: comparing Old Portuguese and Dialectal Portuguese

Differently from the standard contemporary variety of European Portuguese, in which subject-verb inversion is considered categorical in gerund clauses, in Old Portuguese and Dialectal European Portuguese we can find both subject-verb and verb-subject orders in gerund clauses. These variable word orders challenge the generalization that languages with a positive specification of the null subject parameter display obligatory subject-verb inversion in gerund clauses. Therefore, other factors have to be taken into account. This work investigates the factors that condition subject-verb word order in gerund clauses of Old Portuguese and Dialectal European Portuguese, considering data from CORDIAL-SIN, a corpus of spoken varieties of speakers from rural areas of Portugal, and data from a sample of texts from the CIPM, a Computerized Corpus of Medieval Portuguese. Corpus data show us that there is a difference in the frequency of subject-verb inversion in both varieties: verb-subject is the predominant word order in Old Portuguese, while subject-verb is the predominant word order in the dialects, regardless of the presence of inflected gerunds. In what concerns the conditioning factors that may trigger one order or the other, we considered the type of verb, the type of subject, and the presence of a connective. In the dialects, regardless of overt inflection, the most important factor for the post-verbal occurrence of the subject is the type of verb. In contrast, in Old Portuguese subject-verb inversion is the dominant pattern and post-verbal subjects can be found with all verb classes. We hypothesize that differences between the two varieties may correlate with the productivity of gerund clauses introduced by a connective, the specification of the C-domain and information-driven movement.