then I fell down
then I fall down
adv:tem pro:sub v adv
then i fell down .
ð ɛ n WORD_BOUNDARY aɪ WORD_BOUNDARY f ɛ l WORD_BOUNDARY d aʊ n WORD_BOUNDARY
t h e n WORD_BOUNDARY i WORD_BOUNDARY f e l l WORD_BOUNDARY d o w n WORD_BOUNDARY