Having bought the necessary materials,i decided to get down

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/28 12:52:31

Having bought the necessary materials,i decided to get down to the house repairs
那个 have 为什么要加ing啊好像不是动名词短语作主语啊.那那个have 和 bought连在一起怎么理解,是固定词组还是什么?

having引导的前半句不是一个句子,只是为了修饰后面的主句
因为表示主动所以用having 跟的主语是I
having bought是完成时
再问：书上说buy的动作发生在decided前，所以用完成时态的现在分词做时间状语。。这句话是什么意思呢

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