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If we (know) ______ that the books were available, we would have bought them yes
If we (know) ______ that the books were available, we would have bought them yes
游客
2023-09-22
9
管理
问题
If we (know) ______ that the books were available, we would have bought them yesterday.
选项
答案
had known
解析
本题考查虚拟语气。根据句子结构,可以判断这句话是对过去事实进行相反假设的虚拟语气句,因此主句用情态动词+动词的完成式,从句用过去完成时。
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