英语：The book was so interesting that he had read it for three hour_英语解答

英语：The book was so interesting that he had read it for three hours____he realized it.
为什么是before?解释下意思and语法知识.

人气：430 ℃　时间：2019-08-21 03:50:44

解答

had read it是过去的过去是过去完成时后者he realized it是一般过去时用before表示先后而and则表示并列两边时态要一致