it's it's fast isn't it
it fast be it
pro:per adv aux pro:per
it's it's fast isn't it ?
ɪ t s WORD_BOUNDARY ɪ t s WORD_BOUNDARY f æ s t WORD_BOUNDARY ɪ z ə n t WORD_BOUNDARY ɪ t WORD_BOUNDARY
i t ' s WORD_BOUNDARY i t ' s WORD_BOUNDARY f a s t WORD_BOUNDARY i s n ' t WORD_BOUNDARY i t WORD_BOUNDARY