mail hasn't come yet
mail have come yet
n aux v adv
mail hasn't come yet .
m eɪ l WORD_BOUNDARY h æ z ə n t WORD_BOUNDARY k ʌ m WORD_BOUNDARY j ɛ t WORD_BOUNDARY
m a i l WORD_BOUNDARY h a s n ' t WORD_BOUNDARY c o m e WORD_BOUNDARY y e t WORD_BOUNDARY