he didn't say they did
he do say they do
pro:sub mod v pro:sub v
he didn't say they did .
h iː WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY s eɪ WORD_BOUNDARY ð eɪ WORD_BOUNDARY d ɪ d WORD_BOUNDARY
h e WORD_BOUNDARY d i d n ' t WORD_BOUNDARY s a y WORD_BOUNDARY t h e y WORD_BOUNDARY d i d WORD_BOUNDARY