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她一定把钥匙丢了英语怎么说

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她一定把钥匙丢了英语怎么说
她一定把钥匙丢了英语怎么说
She must have lost her keys.
用虚拟语气,must have done 表示对过去情况的推测.
如果这句话还要一个过去的时间作为参照,可以用must have had done的结构,例如:She must have had lost her keys because she couldn't find them anywhere.