고3모의고사 40번지문에
most significant was the invention of a precise and unanbiguous notation that could record a wide variety of rhythms and
allowed music to be distributed in writing and performed accurately wherever it went.
문장에서 ebs해설에서는 record와 allowed가 병렬이라고 설명하던데 제가 봐도 병렬밖에 안될것같은데 could가 걸리는데도 과거형을 저렇게 쓸수 있나요??
문장구조가 어떻게 되는건지 설명좀 부탁드려요~ㅜㅜ