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arepli,hedecidedtowriteagain填什么Nothavingreceived还是Havingnotreceived可是对分词否定也有这样的Ihaven'teatenlunch。这有区别吗

题目详情
a repli ,he decided to write again填什么
Not having received还是Having not received
可是对分词否定也有这样的I haven't eaten lunch。这有区别吗
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答案和解析
not Having received
句首通常这样讲.习惯用语
你补充的have不是分词,而是完成式里的助动词