作业帮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
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.
She must lose the key.
She should have had lost her keys. 切记不要用must，那是命令，没有猜测的意思。
楼下说得对，确实我错了。
She must have had lost his keys