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虚拟语气求解答.T T

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虚拟语气求解答.T T
According to the weather report,it may rain tomorrow ,but____,we would have to water the cross ourselves.横线上填Should it not pain,为什么?能不能写出没倒转装前的句子?虚拟语气可以否定吗?
打错了,是should it not rain...
横线上那句的原型是:if it should not rain
表将来时态的虚拟语气 ——从句谓语形式:动词过去式(be用were)/should + 动词原形/were to + 动词原形;主句谓语形式:would / should / might / could + 动词原形
should可以提前,并去掉if,这与"Were I ten years younger,I would study abroad=If I were ten years younger,I would study abroad"是一样的道理.
虚拟语气的从句和主句可以是任意句式,否定当然也可以.