let him take his nap
let him take his nap ?
l ɛ t WORD_BOUNDARY h ɪ m WORD_BOUNDARY t eɪ k WORD_BOUNDARY h ɪ z WORD_BOUNDARY n æ p WORD_BOUNDARY
l e t WORD_BOUNDARY h i m WORD_BOUNDARY t a k e WORD_BOUNDARY h i s WORD_BOUNDARY n a p WORD_BOUNDARY