his arm fell off
his arm fall off
det:poss n v adv
his arm fell off.
h ɪ z WORD_BOUNDARY ɑ ɹ m WORD_BOUNDARY f ɛ l WORD_BOUNDARY ɔ f WORD_BOUNDARY
h i s WORD_BOUNDARY a r m WORD_BOUNDARY f e l l WORD_BOUNDARY o f f . WORD_BOUNDARY