疑问词加动词不定式到底可以干什么啊

疑问词加动词不定式到底可以干什么啊

“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( www.zxxyyz.com )收集整理

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