if you had told math teacher your parents were ill at the time.

Question

如题所述

Answer 1

这句话的意思是：
“你的数学老师会很高兴给你一次补考的机会，但前提是你当时向他通知了你父母当时生病了。”

这句话是虚拟语气与过去事实相反的用法，并省略if。

虚拟语气在非真实条件句中的用法（与过去事实相反）的结构是：
条件从句：If sb.+had done
结果主句：sb.+should,could, would+have done

这句话也可以写成：“If you had gone and explained that your parents （were）ill at the time, your math instructor would have been happy to give you a make-up examination. ”
这是包括if的用法。
用were是因为事件已经发生在过去。不能用had been因为事实在过去已发生并不是持续性的事件。

与过去事实相反：
如：If I had taken your advice, I wouldn’t have made such a mistake.如果当时听了你的话，我就不会犯这样的错误了。
If it had not been for your help, I wouldn’t have finished the work so easily.要不是你的帮忙，我的工作不会这么容易完成。

如果还有问题，请尽管问。谢谢，希望我的答案对你有所帮助。