we haven't seen him we don't know
we have see him we do know
pro:sub aux part pro:obj pro:sub mod v
we haven't seen him we don't know .
w iː WORD_BOUNDARY h æ v ə n t WORD_BOUNDARY s iː n WORD_BOUNDARY h ɪ m WORD_BOUNDARY w iː WORD_BOUNDARY d oʊ n t WORD_BOUNDARY n oʊ WORD_BOUNDARY
w e WORD_BOUNDARY h a v e n ' t WORD_BOUNDARY s e e n WORD_BOUNDARY h i m WORD_BOUNDARY w e WORD_BOUNDARY d o n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY