why did that happen
why do that happen
pro:int mod pro:rel v
why did that happen ?
w aɪ WORD_BOUNDARY d ɪ d WORD_BOUNDARY ð æ t WORD_BOUNDARY h æ p ə n WORD_BOUNDARY
w h y WORD_BOUNDARY d i d WORD_BOUNDARY t h a t WORD_BOUNDARY h a p p e n WORD_BOUNDARY