because he was frightened
because he be frighten
conj pro:sub aux part
because he was frightened .
b ɪ k ʌ z WORD_BOUNDARY h iː WORD_BOUNDARY w ʌ z WORD_BOUNDARY f ɹ aɪ ʔ n̩ d WORD_BOUNDARY
b e c a u s e WORD_BOUNDARY h e WORD_BOUNDARY w a s WORD_BOUNDARY f r i g h t e n e d WORD_BOUNDARY