what did they do
what do they do
pro:int mod pro:sub v
what did they do ?
w ʌ t WORD_BOUNDARY d ɪ d WORD_BOUNDARY ð eɪ WORD_BOUNDARY d uː WORD_BOUNDARY
w h a t WORD_BOUNDARY d i d WORD_BOUNDARY t h e y WORD_BOUNDARY d o WORD_BOUNDARY