I had been living a comfortable life until the final exams have been后面可以接doing?

分类: 作业答案 • 2021-12-29 10:37:23

问题描述：

I had been living a comfortable life until the final exams have been后面可以接doing?
这个时态.肿么回事

答

可以的,这是过去完成进行时
因为有个came作比较,所以就不能用was doing
在期末考试来临之前,我一直都过着舒适的生活.为什么考试加s应该是一个泛指吧，指的是期末考试不止一场，有很多科目的考试啊~恩~