Abstract
The verbal negation system of Brazilian Portuguese (BP) presents three forms: preverbal, double and postverbal negation, as can be seen in following examples: *MIC: [91] mas / Michael / eu não falo nesse sentido // (ii) *DOM: [101] cês nũ lêem isso mais não // (iii) *RUT: [220] participa não / minha filha //. The goal of this paper is to investigate whether there is any kind of prosodic-informational restriction to the distribution and use of the above mentioned negation forms in BP through the spontaneous speech corpus C-ORAL-BRASIL BRASIL (Raso & Mello, 2012). Through the analysis of data from C-ORAL-BRASIL, we propose that double and postverbal negation can only occur in illocutionary information units (COM, CMM, COB); whereas preverbal negation has free distribution, occurring in both illocutionary and non-illocutionary textual units. This indicates that non-canonical negation forms depend on illocutionary force in order to be fully realized.