they didn't fall down did they
they do fall down do they
pro:sub mod v adv mod pro:sub
they didn't fall down did they ?
ð eɪ WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY f ɔː l WORD_BOUNDARY d aʊ n WORD_BOUNDARY d ɪ d WORD_BOUNDARY ð eɪ WORD_BOUNDARY
t h e y WORD_BOUNDARY d i d n ' t WORD_BOUNDARY f a l l WORD_BOUNDARY d o w n WORD_BOUNDARY d i d WORD_BOUNDARY t h e y WORD_BOUNDARY