I had never heard of it until I read the book
I have never hear of it until I read the book
pro:sub v adv v prep pro:per conj pro:sub v det:art n
i had never heard of it until i read the book .
aɪ WORD_BOUNDARY h æ d WORD_BOUNDARY n ɛ v ɚ WORD_BOUNDARY h ɜː d WORD_BOUNDARY ʌ v WORD_BOUNDARY ɪ ɾ WORD_BOUNDARY ʌ n t ɪ l WORD_BOUNDARY aɪ WORD_BOUNDARY ɹ iː d WORD_BOUNDARY ð ə WORD_BOUNDARY b ʊ k WORD_BOUNDARY
i WORD_BOUNDARY h a d WORD_BOUNDARY n e v e r WORD_BOUNDARY h e a r d WORD_BOUNDARY o f WORD_BOUNDARY i t WORD_BOUNDARY u n t i l WORD_BOUNDARY i WORD_BOUNDARY r e a d WORD_BOUNDARY t h e WORD_BOUNDARY b o o k WORD_BOUNDARY