I don't I don't know
I do I do know
pro:sub mod pro:sub mod v
i don't i don't know .
aɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY aɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY n oʊ WORD_BOUNDARY
i WORD_BOUNDARY d o n ' t WORD_BOUNDARY i WORD_BOUNDARY d o n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY