Answer:
no, we cant say "could have HAVE been"
Explanation:
saying double have sounds weird and isn't the right way to talk.
The answer is negative four because you must change two negatives into a positive
If the story you are referring to is "The Great Gatsby", it might be said that Nick learned that she is a dishonest woman because she cheated to win the golf tournament. She might be considered a compulsive liar and she seemed to assume that everyone was like her,