I'm not pretending
I not pretend
pro:sub neg part
i'm not pretending.
aɪ m WORD_BOUNDARY n ɑ t WORD_BOUNDARY p ɹ ɪ t ɛ n d ɪ ŋ WORD_BOUNDARY
i ' m WORD_BOUNDARY n o t WORD_BOUNDARY p r e t e n d i n g . WORD_BOUNDARY