he danced didn't he
he dance do he
pro:sub part mod pro:sub
he danced didn't he ?
h iː WORD_BOUNDARY d æ n s t WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY h iː WORD_BOUNDARY
h e WORD_BOUNDARY d a n c e d WORD_BOUNDARY d i d n ' t WORD_BOUNDARY h e WORD_BOUNDARY