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where must the puma have come from,怎么翻译,有的说 must have done,可

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where must the puma have come from,怎么翻译,有的说 must have done,可是come不是done的形式啊?
where must the puma have come from,怎么翻译,有的说 must have done,可
come怎么不是must have done中的done的形式了?
done是特指动词的过去完成式,come的过去完成式不还是come么?过去式才是came
这个句子是一个完全倒装句,以where开头,所以must会放前面.
意思：Puma来自哪里?
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