he's been changing it
he be change it
pro:sub aux part pro:per
he's been changing it .
h iː z WORD_BOUNDARY b ɪ n WORD_BOUNDARY t̠ʃ eɪ n d̠ʒ ɪ ŋ WORD_BOUNDARY ɪ t WORD_BOUNDARY
h e ' s WORD_BOUNDARY b e e n WORD_BOUNDARY c h a n g i n g WORD_BOUNDARY i t WORD_BOUNDARY