the experts realized that aerodynamic phenomena in suspension bridges were not adequately understood in the profession nor had they been addressed in the design.이 문장에서 nor 뒷부분 동사가 왜 대과거인가요? 그러면 were not understood 여기도 대과거가 되어야하는거 아닌가요?^^;;
답변 부탁드립니다
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2022-03-26 13:42:36