I'm not an expert but
i'm not an expert but .
aɪ m WORD_BOUNDARY n ɑː t WORD_BOUNDARY ɐ n WORD_BOUNDARY ɛ k s p ɜː t WORD_BOUNDARY b ʌ t WORD_BOUNDARY
i ' m WORD_BOUNDARY n o t WORD_BOUNDARY a n WORD_BOUNDARY e x p e r t WORD_BOUNDARY b u t WORD_BOUNDARY