I don't know that
I do know that
pro:sub mod v pro:dem
i don't know that .
aɪ WORD_BOUNDARY d oʊ n t WORD_BOUNDARY n oʊ WORD_BOUNDARY ð æ t WORD_BOUNDARY
i WORD_BOUNDARY d o n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY t h a t WORD_BOUNDARY