Question

___it rain tomorrow , we would have to cancel the football match a were b would c will d should

为什么不选a呀
虚拟语气怎么用呀

Answer 1

虚拟语气，前面的句子表示对未来情况的假设，没有if所以be动词提前，对未来假设的情况，从句用一般过去时，或者谓语动词用were to 或者should do，所以选择D

Answer 2

选D。
虚拟语气暗示下雨的可能性不大。

举两例：
人们常说——
Should you have any question, please do not hesitate to ask.
有问题的话，仅管提出来。
Should someone ask, tell them I'm in a meeting.
有人问起的话，告诉他们我在开会。

追问

were 和would 不能用于虚拟吗