postman's come hasn't he
come have he
part aux pro:sub
postman's come hasn't he ?
p əʊ s t m ə n z WORD_BOUNDARY k ʌ m WORD_BOUNDARY h a z ə n t WORD_BOUNDARY h iː WORD_BOUNDARY
p o s t m a n ' s WORD_BOUNDARY c o m e WORD_BOUNDARY h a s n ' t WORD_BOUNDARY h e WORD_BOUNDARY