__before we leave the day after tomorrow,we should have a wonderful party 答案是were they to arrive 还有 Had they arrived Were they arriving Would they arrive 一点这个倒装句的助词提前为什么是were是过去式 ,不是原形are 不是had或 did 二点 to arrive arrived ariving arrive分别在什么情况下用
人气：377 ℃ 时间：2019-08-22 16:39:03
解答
were they to arrive 在这里是虚拟条件句,从时间状语the day after tomorrow（后天）来看 是对将来的虚拟, 所以选这个它等于If they were to arrive... Had they arrived 是对过去的虚拟, 等于 if they had arrived,...虚拟条件为什么用 were这个是过去式 但不定式to arrive表将来做的，就是
