we don't know that since we're at the back
we don't know that since we're at the back.
w iː WORD_BOUNDARY d oʊ n t WORD_BOUNDARY n oʊ WORD_BOUNDARY ð æ t WORD_BOUNDARY s ɪ n s WORD_BOUNDARY w ɪ ɹ WORD_BOUNDARY æ t WORD_BOUNDARY ð ə WORD_BOUNDARY b æ k WORD_BOUNDARY
w e WORD_BOUNDARY d o n ' t WORD_BOUNDARY k n o w WORD_BOUNDARY t h a t WORD_BOUNDARY s i n c e WORD_BOUNDARY w e ' r e WORD_BOUNDARY a t WORD_BOUNDARY t h e WORD_BOUNDARY b a c k . WORD_BOUNDARY