he didn't answer he didn't understand
he do understand
pro:sub mod v
he didn't answer he didn't understand .
h iː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY æ n s ɚ WORD_BOUNDARY h iː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY ʌ n d ɚ s t æ n d WORD_BOUNDARY
h e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY a n s w e r WORD_BOUNDARY h e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY u n d e r s t a n d WORD_BOUNDARY