when who was doing what
when who be do what
conj pro:int aux part pro:int
when who was doing what ?
w ɛ n WORD_BOUNDARY h uː WORD_BOUNDARY w ʌ z WORD_BOUNDARY d uː ɪ ŋ WORD_BOUNDARY w ʌ t WORD_BOUNDARY
w h e n WORD_BOUNDARY w h o WORD_BOUNDARY w a s WORD_BOUNDARY d o i n g WORD_BOUNDARY w h a t WORD_BOUNDARY