I'm not pretending
I not pretend
pro:sub neg part
i'm not pretending .
aɪ m WORD_BOUNDARY n ɑː 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