______ before we depart the day after tomorrow, we should have a wonderful dinner party.A. Had they arrived B. Would they arrive C. Were they arriving D. Were they to arrive 为什么不选C,而是选D
问题描述：
______ before we depart the day after tomorrow, we should have a wonderful dinner party.
A. Had they arrived B. Would they arrive
C. Were they arriving D. Were they to arrive
为什么不选C,而是选D
答
正确答案 ：D 虚拟语气中虚拟将来的句型，外加倒装句结构。
原本应该是这样的句型 If they were to arrive before we depart the day after tomorrow, we should have a wonderful dinner party. 把第一个if去掉，were提前到they之前做倒装。
答
这是对将来表示的虚拟语气，固定表达是were to do
答
你好,这是与将来事实相反的虚拟语气,并且省略了IF,与将来事实相反的虚拟语气的构成如下:IF 从句用:1. should +do2. were to do 3.动词的过去式主句用could /should/might/would+do当IF从句的谓语是should/were 时,可...