keep work on 还是keep on working?Cutting down trees后面用do 还是does?为什么
人气：128 ℃ 时间：2020-05-19 22:11:46
解答
keep on working 继续工作,固定搭配
cutting down trees是动名词短语作主语,谓语动词用单数does能再说下用谓语动词用does和do的时候一些常见的主语情况吗？主语是第一人称单数时，或者是主语是动名词短语、动词不定式短语从句作主语，都用单数does
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