what happened to them
what happen to them
pro:int v prep pro:obj
what happened to them ?
w ʌ t WORD_BOUNDARY h æ p ə n d WORD_BOUNDARY t ə WORD_BOUNDARY ð ɛ m WORD_BOUNDARY
w h a t WORD_BOUNDARY h a p p e n e d WORD_BOUNDARY t o WORD_BOUNDARY t h e m WORD_BOUNDARY