Question

解释下这道英文题的考点

（）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

Answer 1

D were they to arrive
考查倒装、虚拟、省略
If 虚拟条件句中若含有 had, should, were的形式表示虚拟，则可以把这三个词提前构成倒装，并且省掉if连词。
再如：
If he had been here yesterday, he would have stopped me from doing that.
=Had he been here yesterday, he would have stopped me from doing that.

Were they to arrive before we depart the day after tomorrow, we should have a wonderful dinner party.
=If they were to arrive before we depart the day after tomorrow, we should have a wonderful dinner party.
如果他们在我们分手之前能够到来的话， 我们就应该举办举办一场精彩的晚宴聚会。

Answer 2

关于虚拟条件句的表示将来时态的倒装用法
在虚拟条件句中,were,should,had可以倒装放在句首
选d
等于If they were to arrive before
we depart the day after tomorrow, we should have a wonderful dinner party