you know I'm not sure
you know i'm not sure .
j uː WORD_BOUNDARY n oʊ WORD_BOUNDARY aɪ m WORD_BOUNDARY n ɑ t WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY
y o u WORD_BOUNDARY k n o w WORD_BOUNDARY i ' m WORD_BOUNDARY n o t WORD_BOUNDARY s u r e WORD_BOUNDARY