一道改错题：
问题描述：
一道改错题：
Should John resign and Henry succeed him,we would have had a more vigorous leadership.
Should为A处
succeed为B处
would have had为C处
more为D处
我感觉是C错 但是又说不出原因
题中有the ONE must be changed
答
应该是c处,将would have had改为would have 这属于if引导的虚拟条件句,对将来事实的假设,在非真实条件状语从句中,谓语动词按正常情况“后退一步”.也就是：①与过去事实相反,在从句中用过去完成时形式表示. ②与现在...