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情态动词 + have done 的用法
英语中并没有 “can have done” 这样的说法,却可以在特定语境中使用 “can't have done”。 本期节目辨析五个包含 “have done” 的结构的含义和用法。 欢迎你加入并和我们一起讨论英语学习的方方面面。 请通过微博 “ BBC英语教学 ” 或邮件与我们取得联系。
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