let him go back to sleep
let him go back to sleep ?
l ɛ t WORD_BOUNDARY h ɪ m WORD_BOUNDARY ɡ oʊ WORD_BOUNDARY b æ k WORD_BOUNDARY t ə WORD_BOUNDARY s l iː p WORD_BOUNDARY
l e t WORD_BOUNDARY h i m WORD_BOUNDARY g o WORD_BOUNDARY b a c k WORD_BOUNDARY t o WORD_BOUNDARY s l e e p WORD_BOUNDARY