I doubt that very seriously
I doubt that very serious
pro:sub v comp adv adv
i doubt that very seriously .
aɪ WORD_BOUNDARY d aʊ t WORD_BOUNDARY ð æ t WORD_BOUNDARY v ɛ ɹ i WORD_BOUNDARY s ɪ ɹ i ə s l i WORD_BOUNDARY
i WORD_BOUNDARY d o u b t WORD_BOUNDARY t h a t WORD_BOUNDARY v e r y WORD_BOUNDARY s e r i o u s l y WORD_BOUNDARY