“特殊疑问词＋动词不定式”的用法归纳 一、疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，构成不定式短语。这种结构在句中可作主语、宾语、表语、宾语补足语等句子成分。如： 1. Where to go is still a question. 到哪里去还是个问题。（作主语） 2. I know where to find the boy. 我知道到哪里能找到这个男孩。（作动词know的宾语） 3. We must first solve the problem of whom to serve. 我们必须首先解决为谁服务的问题。（作介词of的宾语） 4. The question is how to learn English well. 问题是怎样学好英语。（作表语） 5. I asked her how to learn English. 我问她如何学英语。（用宾语） 二、“特殊疑问词＋动词不定式”结构经常用在某些动词后作宾语，类似的动词有：tell, show, know, learn, teach, find out, forget, wonder, remember等。如： I’ll show you how to do it. 我要让你看看如何做这件事。 You’d better find out where to put it. 你最好弄清楚要把它放在哪里。 三、“特殊疑问词＋动词不定式”这种结构可以把复合句转为简单句。如： I don’t know what I’ll do next. = I don’t know what to do next. The doctor told him when he should take the medicine. =The doctor told him when to take the medicine. 同样，因为“特殊疑问词＋动词不定式”这种结构相当于一个名词性从句，所以可用同等成分的从句代替，从而把简单句转换为复合句。改写时只需在疑问词后加上适当的主语，并把不定式改为适当的形式的谓语即可。如： Li Ping doesn’t know why to learn English. = Li Ping doesn’t know why he should learn English. Which to choose is important. = Which we should choose is important. The question is where to go. = The question is where we should go. 四、“特殊疑问词＋动词不定式”这种结构可构成独立问句。如： What to do? 怎么办？ How to get rid of the trouble? 如何摆脱困境？ 以上内容为中小学英语站(
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