题目内容
12．我不知道怎么使用这台机器．I don't knowhow to use this machine．
分析 how to use
解答 答案：how to use 通过中英文句子的比对，可知英文句子中缺少"怎样使用"的表达．且放在动词know后面作宾语，疑问词"怎样"是how，动词"使用"是use，翻译本句可以用"疑问词+动词不定式"这一结构，该结构中的疑问词，包括疑问代词what/which/who和疑问副词when/how/where 等．这些疑问词和不定式一起构成了不定式短语，这种结构在句子中除了不能作谓语外，可做主语、宾语、表语等．故答案为：how to use
点评 "疑问词+动词不定式"这种结构相当于一个名词从句，不论它在句子中做什么成分，常常都可用同等成分的从句替代．改为从句时只要在疑问词后面添加一个适当的主语并将不定式动词改为适当形式的谓语既可．
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