I didn't write the letter
I do write the letter
pro:sub mod v det:art n
i didn't write the letter .
aɪ WORD_BOUNDARY d ɪ d n t WORD_BOUNDARY ɹ aɪ t WORD_BOUNDARY ð ə WORD_BOUNDARY l ɛ ɾ ɚ WORD_BOUNDARY
i WORD_BOUNDARY d i d n ' t WORD_BOUNDARY w r i t e WORD_BOUNDARY t h e WORD_BOUNDARY l e t t e r WORD_BOUNDARY