I'm not quite sure
I not quite sure
pro:sub neg adv adj
i'm not quite sure .
aɪ m WORD_BOUNDARY n ɑː t WORD_BOUNDARY k w aɪ t WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY
i ' m WORD_BOUNDARY n o t WORD_BOUNDARY q u i t e WORD_BOUNDARY s u r e WORD_BOUNDARY