因为我的想的是宾语从句吗,要用should,但是一碰到时态上的改变,我就转不过弯来了。
整句话:
Your math instructor would have been happy to give you makeup examination had you gone and explained that your parents were ill at that time.
虚拟语气里面的宾语从句为什么不是(should)be ill,难道是因为句尾那个at that time吗,那我不能用have been吗?谢谢解答!