——ten minutes earlier,you wouldn＇t have missed the train．But you were late．
问题描述：
——ten minutes earlier,you wouldn＇t have missed the train．But you were late．
横线处,填 Had you com 还是 Have you come
为什么是 you were late.用were？
答
Had you come ten minutes earlier,you wouldn't have missed the train.But you were late.
这句话用虚拟语气,意思是对过去事情的假设.
如果你早来十分钟,就可以赶上火车,但是你迟到了.
过去完成时态的虚拟语气,用Had.
而后面的you were late,是说已经发生的那时的状态,用are的过去时态were
建议你去查找一些关于虚拟语气的资料来学习下.