he didn't pay did he
he do pay do he
pro:sub mod v mod pro:sub
he didn't pay did he?
h iː WORD_BOUNDARY d ɪ d n tʰ WORD_BOUNDARY pʰ eɪ WORD_BOUNDARY d ɪ d WORD_BOUNDARY h iː WORD_BOUNDARY
h e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY p a y WORD_BOUNDARY d i d WORD_BOUNDARY h e ? WORD_BOUNDARY