that's happened hasn't it
that happen have it
pro:dem part aux pro:per
that's happened hasn't it ?
ð æ t s WORD_BOUNDARY h æ p ə n d WORD_BOUNDARY h æ z ə n t WORD_BOUNDARY ɪ t WORD_BOUNDARY
t h a t ' s WORD_BOUNDARY h a p p e n e d WORD_BOUNDARY h a s n ' t WORD_BOUNDARY i t WORD_BOUNDARY