The book you borrowed from the library should been returned in five days.
那什么.为什么不是The book you borrowed from the library should be returned in five days.为什么是“been”不是“be”?
人气：271 ℃ 时间：2019-10-24 12:41:36
解答
有两种可能：
1 The book you borrowed from the library should be returned in five days.（指将来）
2 The book you borrowed from the library should have been returned five days ago (指过去)
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