难理解的 with which to do sth

She hasn’t got enough money with which to buy the car. 她没有足够的钱去买车.

老师这里为什么用到 with? 定语从句关系代词要在句子里要作成分，但这里的先行词which在句子里做什么成分?

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分类：句法问题

最佳答案 2020-10-24 16:51

这是省略主语而用一个特殊的不定式短语（通常用主动式）代替或简化定语从句，不定式动作的执行者是句子的主语she。即：with which to buy the car = with which she can buy the car，which指代money。1984版高中英语第二册第14课“The Gifts”中就有类似的一个表达：

Tomorrow would be Christmas Day, and she had only $1.87 with which to buy Jim, her husband, a present. 明天就是圣诞节了，她只有1美元87美分给她丈夫吉姆买礼物。（句中的with which to buy = with which she could buy）

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