with which to peel an apple为何是定从
She bought a knife from the shop with which to peel an apple.
为什么是with which呢，with a knife to peel an apple也构不成句子啊
我选的是with that。
最佳答案 2022-12-17 21:59
称之为定语从句确实会让人困惑，但这确实是定语从句的一种变体，介词+关系代词+不定式通常相当于介词+关系代词+主语+情态动词+谓语。
She bought a knife from the shop with which to peel an apple.
相当于：
She bought a knife from the shop with which she could peel an apple.
可以类比一下疑问代词+不定式（通常相当于疑问词+主语+情态动词+谓语），你可能就更能接受这种结构了。
I don't know what to do next.
相当于：
I don't know what I should do next.
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