Jane didn’t know the answer.She had only been guessing 为什么是错的?

问题描述:

Jane didn’t know the answer.She had only been guessing 为什么是错的?

第二句与第一句的时态相差甚远.她“猜”这个动作不能在过去一直延续一直延续,所以不能用过去完成进行时.