he willn't do it
he will do it
pro:sub mod v pro:per
he will not do it.
h iː WORD_BOUNDARY w ɪ l WORD_BOUNDARY n ɑ t WORD_BOUNDARY d uː WORD_BOUNDARY ɪ t WORD_BOUNDARY
h e WORD_BOUNDARY w i l l WORD_BOUNDARY n o t WORD_BOUNDARY d o WORD_BOUNDARY i t . WORD_BOUNDARY