he doesn't know which
he do know which
pro:sub mod v pro:int
he doesn't know which .
h iː WORD_BOUNDARY d ʌ z ə n t WORD_BOUNDARY n oʊ WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY
h e WORD_BOUNDARY d o e s n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY w h i c h WORD_BOUNDARY