__before we leave the day after tomorrow,we should have a wonderful party
__before we leave the day after tomorrow,we should have a wonderful party 答案是were they to arrive 還有 Had they arrived Were they arriving Would they arrive 一點這個倒裝句的助詞提前為什么是were是過去式 ,不是原形are 不是had或 did 二點 to arrive arrived ariving arrive分別在什么情況下用
were they to arrive 在這里是虛擬條件句,從時間狀語the day after tomorrow(后天)來看 是對將來的虛擬, 所以選這個它等于If they were to arrive... Had they arrived 是對過去的虛擬, 等于 if they had arrived,...虛擬條件為什么用 were這個是過去式 但不定式to arrive表將來做的,就是