what happened to that
what happen to that
pro:int v inf adv
what happened to that ?
w ʌ t WORD_BOUNDARY h æ p ə n d WORD_BOUNDARY t ə WORD_BOUNDARY ð æ t WORD_BOUNDARY
w h a t WORD_BOUNDARY h a p p e n e d WORD_BOUNDARY t o WORD_BOUNDARY t h a t WORD_BOUNDARY