because you don't need both
because you do need both
conj pro:per mod v qn
because you don't need both.
b ɪ k ʌ z WORD_BOUNDARY j uː WORD_BOUNDARY d oʊ n t WORD_BOUNDARY n iː d WORD_BOUNDARY b oʊ θ WORD_BOUNDARY
b e c a u s e WORD_BOUNDARY y o u WORD_BOUNDARY d o n ' t WORD_BOUNDARY n e e d WORD_BOUNDARY b o t h . WORD_BOUNDARY