I'm not sure about that
I not sure about that
pro:sub neg adv prep pro:dem
i'm not sure about that.
aɪ m WORD_BOUNDARY n ɑ t WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY ð æ t WORD_BOUNDARY
i ' m WORD_BOUNDARY n o t WORD_BOUNDARY s u r e WORD_BOUNDARY a b o u t WORD_BOUNDARY t h a t . WORD_BOUNDARY