Without facts,we can't form a worthwhile opinion,for we need

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/21 16:00:02

Without facts,we can't form a worthwhile opinion,for we need to have factual knowledge upon which to base our thinking.请问在这个句子里,which后的不定式怎么理解?which引导定语从句有这种用法吗?

1.upon which to base our thinking=which to base our thinking upon
翻译：for we need to have factual knowledge upon which to base our thinking
因为我们需要有能以此为基础,可建立我们思想的事实性的知识.
2.上述结构是比较常见的“疑问词+不定式”结构,此处它做后置定语,修饰knowledge.
3.“疑问词+不定式”结构的具体讲解请参看我的另一回答：
4.“疑问词+不定式”中如果是疑问代词,而且它做后面不定式中所带的某个介词的宾语时,常常会把这个介词提前至疑问词前.
如：I want to find a story on which to base my new novel.
我想找到一个可以此为基础,写出我新小说的故事.

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