what's happened to you
what happen to you
pro:int part prep pro:per
what's happened to you ?
w ʌ t s WORD_BOUNDARY h æ p ə n d WORD_BOUNDARY t ə WORD_BOUNDARY j uː WORD_BOUNDARY
w h a t ' s WORD_BOUNDARY h a p p e n e d WORD_BOUNDARY t o WORD_BOUNDARY y o u WORD_BOUNDARY