did you understand what he said
do you understand what he say
mod pro:per v pro:int pro:sub v
did you understand what he said?
d ɪ d WORD_BOUNDARY j uː WORD_BOUNDARY ʌ n d ə ɹ s t æ n d WORD_BOUNDARY w ʌ t WORD_BOUNDARY h iː WORD_BOUNDARY s ɛ d WORD_BOUNDARY
d i d WORD_BOUNDARY y o u WORD_BOUNDARY u n d e r s t a n d WORD_BOUNDARY w h a t WORD_BOUNDARY h e WORD_BOUNDARY s a i d ? WORD_BOUNDARY