特殊疑问词动词不定式的用法归纳
特殊疑问词动词不定式结构
“特殊疑问词+不定式”的用法“疑问词+不定式”结构(question word + to-infinitive)4)疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式,以及连接副词whether与不定式连用构成不定式短语(在作用上相当于一个名词性从句,名词成分)。
这种结构在句中可作主语、宾语、表语、复合宾语的直接宾语、状语、同位语等句子成分。
注意:疑问副词why 后不能跟动词不定式一、“疑问词+不定式动词”结构的几种功用:1)作主语Where to go is still a question. 到哪里去还是个问题。
(作主语时,谓语动词常用单数形式)When to hold the meeting has not yet been decided.Choosing what to eat is no longer as easy as it once was. 选择吃什么,已经不像以前那么...When to start has not been decided. 何时动身尚未决定。
What to read is an important question. 该读些什么是一个很重要的问题。
How to begin is more difficult than where to stop. 如何开始比到哪里停止还困难。
2)作宾语(作用相当于名词性从句)A. 用作动词宾语He asked how to open the box. 他询问如何打开盒子。
She couldn’t think what to say. 她想不出说什么。
He could not tell whom to trust.Our teacher explained how to use the word processor. 老师向我们说明如何使用文字处理机。
I know where to find the boy. 我知道到哪里能找到这个男孩。
特殊疑问词+动
1. 作主语：作主语时，谓语动词 常用单数形式。例如： Where to go tomorrow has not been decided. 明天 到什么地方去尚未决定。 How to divide labor among the workers is still a question. 这些工人之间如何 分工仍是个问题。
4. 作介词宾语：某些介词后面可接"疑问词 ＋不定式"作宾语，这类介词常用的有 about, as, from, in, of, on, with等。 例如： You also need to learn the basic skills of rafting, such as how to handle the raft, how to paddle and how to get in and out of the raft. 你还需要学习基本划木筏的技巧，比 如驾驭木筏的方法，划桨方法，上下木筏的 方法。 He has no idea of how to answer this question. 他不知道怎样回 答这个问题。 Della had only $1.87 with which to buy Jim a present. 德拉仅有$1.87 为来吉姆买一件礼物。(which是关系代词) You have a number of topics from which to choose. 你有很多题目 可以选择。(which是关系代词)
“特殊疑问词＋动词不定式”的 用法
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：
特殊疑问词+动词不定式结构以及句法功能
“特殊疑问词＋动词不定式”的用法一、“疑问词+不定式”结构中。
疑问代词who, what, which 等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（这个不定时短语相当于一个名词）。
这种结构在句中可作主语、宾语、表语、宾语的补语，状语，同位语等句子成分。
注意：疑问副词why后不能跟动词不定式作主语Where to go is still a question. 到哪里去还是个问题。
（作主语，作主语时，谓语动词常用单数形式）Choosing what to eat is no longer as easy as it once was.选择吃什么,已经不像以前那么简单了。
作宾语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）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）作表语The question is how to learn English well.问题是怎样学好英语。
（作表语）作宾语补语I asked her how to learn English.我问她如何学英语。
（用双宾语，宾语补足语）做状语She was at a loss what to do.她不知如何是好。
（做状语）做同位语The question whether to confess troubled the girl.是否要坦白的问题使姑娘很烦恼。
（做同位语）I have no idea which one to take.我不知道拿哪个好。
（同位语）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。
特殊疑问词+动词不定式结构
“特殊疑问词＋不定式”的用法“疑问词+不定式”结构(question word + to-infinitive)4）疑问代词who, what, which等与疑问副词when, where, how等后面跟不定式,以及连接副词whether 与不定式连用构成不定式短语(在作用上相当于一个名词性从句,名词成分)。
这种结构在句中可作主语、宾语、表语、复合宾语的直接宾语、状语、同位语等句子成分。
注意:疑问副词why后不能跟动词不定式一、“疑问词+不定式动词”结构的几种功用:1)作主语Where to go is still a question、到哪里去还就是个问题。
(作主语时,谓语动词常用单数形式)When to hold the meeting has not yet been decided、Choosing what to eat is no longer as easy as it once was、选择吃什么,已经不像以前那么、、、When to start has not been decided、何时动身尚未决定。
What to read is an important question、该读些什么就是一个很重要的问题。
How to begin is more difficult than where to stop、如何开始比到哪里停止还困难。
2）作宾语(作用相当于名词性从句)A、用作动词宾语He asked how to open the box、她询问如何打开盒子。
She couldn’t think what to say、她想不出说什么。
He could not tell whom to trust、Our teacher explained how to use the word processor、老师向我们说明如何使用文字处理机。
I know where to find the boy、我知道到哪里能找到这个男孩。
最新“特殊疑问词+动词不定式”的用法归纳
“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh-+to do）。
疑问词部分包括疑问代词who, whom, what, which和whose以及疑问副词when, where和how。
此外，连接词“whether”也适用.它主要具有以下几种功能：⑴当主语，如：● When to hold the meeting has not yet been decided.● Where to live is a problem.⑵当宾语，常接在forget, find out, discuss, decide, tell, teach, know, learn, wonder, remember等动词之后作宾语如：● We must know what to say at a meeting.● He could not tell whom to trust.● Do you know how to play bridge?⑶当表语，如：● The problem is where to find the financial aid.● The question is who to elect.⑷当名词同位语，如：● Tom had no idea which book to read first.● The question whether to confess troubled the girl.⑸用于宾语补足语,双重宾语。
某些动词后可接“sb.+ 疑问词 + 不定式”构成的双重宾语，这类动词常用的有advise, ask, show, teach, tell等如：● I can tell you where to get this book.● I ask her how to learn English.● He will advise you what to do.● Will you show me how to use the machine?(6) 作介词宾语：某些介词后面可接"疑问词＋不定式"作宾语，这类介词常用的有about, as, from, in, of, on, with等。
(完整版)特殊疑问词+动词不定式结构
特殊疑问词+不定式”的用法"疑问词+ 不定式"结构（question word + to-infinitive ）4）疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（在作用上相当于一个名词性从句，名词成分）。
这种结构在句中可作主语、宾语、表语、复合宾语的直接宾语、状语、同位语等句子成分。
注意：疑问副词why 后不能跟动词不定式一、疑问词+不定式动词”结构的几种功用：1）作主语Where to go is still a questio n.到哪里去还是个问题。
（作主语时，谓语动词常用单数形式）When to hold the meeti ng has not yet bee n decided.Choos ing what to eat is no Ion ger as easy as it once was. 选择吃什么，已经不像以前那么...When to start has not been decided.何时动身尚未决定。
What to read is an important question.该读些什么是一个很重要的问题。
How to begin is more difficult than where to stop. 如何开始比到哪里停止还困难。
2）作宾语（作用相当于名词性从句）A. 用作动词宾语He asked how to open the box.他询问如何打开盒子。
She couldn ' t think what to sa她想不出说什么。
He could not tell whom to trust.Our teacher explained how to use the word processor.老师向我们说明如何使用文字处理机。
(完整版)特殊疑问词+动词不定式结构
+不定式”结构作宾语。这类动词主要有：know, suggest,
他会弹钢琴。
我们一直未发现如何打开这个盒子。
你可以给我解释一下怎么做蛋糕吗？
有些动词，如tell, ask, show, advise, teach, inform等，还可以先加上一个间接宾语，之后再加上“疑
特殊疑问词＋不定式”的用法
+不定式”结构（question word + to-infinitive）
）疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，以及连接副词
与不定式连用构成不定式短语（在作用上相当于一个名词性从句，名词成分）。这种结构在
疑问词 + 不定式）。这类动词常用的有advise, ask, show, teach, tell, inform等，先加上一个间
+不定式”结构作直接宾语。
他会建议你们做什么
你能示范教我如何使用这部机器吗？
should / ought to 或者 should not / ought not to
）作宾语（作用相当于名词性从句）
用作动词宾语
他询问如何打开盒子。
她想不出说什么。
老师向我们说明如何使用文字处理机。
我知道到哪里能找到这个男孩。（作动词know的宾语）
作于间接宾语后作直接宾语
我将给你讲这怎么做。
她好心的劝告我该做什么。
我姐姐教我如何折纸鹤。
to的动词不定式（即动词原形），构成Why do sth.?/Why not do sth? 结构。肯定形式
带有特殊疑问词的不定式
不定式与疑问词不定式可以和疑问代词who, what, which及疑问副词when, how, where等连用,构成不定式短语,在句子中作主语、宾语、表语等。
现将这种用法归纳如下。
一、“疑问词+动词不定式”结构有两种形式:1. “疑问词+to+动词原形”I don’t know what to say. 我不知道说什么。
Can you tell me how to make a paper boat?你能告诉我怎样做一只纸船吗?2. “疑问词+名词+to+动词原形”I don’t know which topic to choose. 我不知道选哪个题目。
二、“疑问词+动词不定式”结构中的疑问词,包括疑问代词who, what,which 和疑问副词how, when, where等。
这些疑问词和不定式一起构成了不定式短语,这种结构可在句子中作以下成分:1. 主语Where to stay for the night is a problem. 晚上在哪儿过夜还是个问题。
What to do is not decided yetHow to begin is more difficult than where to stop2. 宾语We must know how to operate the machine. 我们必须弄懂如何操作这机器。
In one of his books, Marx gave some advice on how to learn a foreign language.在马克思的一本书中,他对如何学习一门外语提出了一些建议。
(作介词on的宾语)Do you know when to start? 你知道什么时候开始吗?I showed her which button to press. 我告诉她应该按哪一个按钮。
、有时还可用于介词后作宾语。
如:I found a book on how to avoid having a heart attack. 我找到一本书谈如何避免心脏病复发。
“特殊疑问词动词不定式”的用法归纳
“特殊疑问词动词不定式”的用法归纳“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh-+to do）。
疑问词部分包括疑问代词who, whom, what, which和whose以及疑问副词when, where和how。
此外，连接词“whether”也适用.它主要具有以下几种功能：⑴当主语，如：● When to hold the meeting has not yet been decided.● Where to live is a problem.⑵当宾语，常接在forget, find out, discuss, decide, tell, teach, know, learn, wonder,remember等动词之后作宾语如：● We must know what to say at a meeting.● He could not tell whom to trust.● Do you know ho w to play bridge?⑶当表语，如：● The problem is where to find the financial aid.● The question is who to elect.⑷当名词同位语，如：● Tom had no idea which book to read first.● The question whether to confess troubled the girl.⑸用于宾语补足语,双重宾语。
某些动词后可接“sb.+ 疑问词+ 不定式”构成的双重宾语，这类动词常用的有advise, ask, show, teach, tell等如：● I can tell you where to get this book.● I ask her how to learn English.● He will advise you what to do.● Will you show me how to use the machine?(6) 作介词宾语：某些介词后面可接"疑问词＋不定式"作宾语，这类介词常用的有about, as, from, in, of, on, with等。
特殊疑问词+动词不定式结构以及句法功能
“特殊疑问词＋动词不定式”的用法一、“疑问词+不定式”结构中。
疑问代词who, what, which 等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（这个不定时短语相当于一个名词）。
这种结构在句中可作主语、宾语、表语、宾语的补语，状语，同位语等句子成分。
注意：疑问副词why后不能跟动词不定式作主语Where to go is still a question. 到哪里去还是个问题。
（作主语，作主语时，谓语动词常用单数形式）Choosing what to eat is no longer as easy as it once was.选择吃什么,已经不像以前那么简单了。
作宾语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）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）作表语The question is how to learn English well.问题是怎样学好英语。
（作表语）作宾语补语I asked her how to learn English.我问她如何学英语。
（用双宾语，宾语补足语）做状语She was at a loss what to do.她不知如何是好。
（做状语）做同位语The question whether to confess troubled the girl.是否要坦白的问题使姑娘很烦恼。
（做同位语）I have no idea which one to take.我不知道拿哪个好。
（同位语）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。
特殊疑问词加不定式
“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。
Yo u’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。
“特殊疑问词+动词不定式”的用法归纳
“特殊疑问词+动词不定式”的用法归纳编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（“特殊疑问词+动词不定式”的用法归纳）的内容能够给您的工作和学习带来便利。
同时也真诚的希望收到您的建议和反馈，这将是我们进步的源泉，前进的动力。
本文可编辑可修改，如果觉得对您有帮助请收藏以便随时查阅，最后祝您生活愉快业绩进步，以下为“特殊疑问词+动词不定式”的用法归纳的全部内容。
“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh—+to do）.疑问词部分包括疑问代词who, whom, what, which和whose以及疑问副词when，where和how。
此外，连接词“whether”也适用。
它主要具有以下几种功能:⑴当主语，如:● When to hold the meeting has not yet been decided。
● Where to live is a problem.⑵当宾语,常接在forget， find out, discuss, decide， tell, teach，know, learn， wonder, remember等动词之后作宾语如：● We must know what to say at a meeting。
● He could not tell whom to trust.● Do you know how to play bridge？⑶当表语，如：● The problem is where to find the financial aid.● The question is who to elect。
⑷当名词同位语，如：● Tom had no idea which book to read first.● The question whether to confess troubled the girl.⑸用于宾语补足语，双重宾语.某些动词后可接“sb.+ 疑问词 + 不定式”构成的双重宾语，这类动词常用的有advise， ask， show， teach, tell等如：● I can tell you w here to get this book。
“特殊疑问词+动词不定式”的用法归纳
“特殊疑问词+动词不定式”的用法归纳编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（“特殊疑问词+动词不定式”的用法归纳）的内容能够给您的工作和学习带来便利。
同时也真诚的希望收到您的建议和反馈，这将是我们进步的源泉，前进的动力。
本文可编辑可修改，如果觉得对您有帮助请收藏以便随时查阅，最后祝您生活愉快业绩进步，以下为“特殊疑问词+动词不定式”的用法归纳的全部内容。
“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh-+to do)。
疑问词部分包括疑问代词who， whom, what, which和whose以及疑问副词when, where和how。
此外,连接词“whether”也适用。
它主要具有以下几种功能：⑴当主语，如：● When to hold the meeting has not yet been decided。
● Where to live is a problem。
⑵当宾语，常接在forget， find out， discuss, decide, tell， teach，know， learn， wonder， remember等动词之后作宾语如：● We must know what to say at a meeting。
● He could not tell whom to trust。
● Do you know how to play bridge?⑶当表语，如：● The problem is where to find the financial aid.● The question is who to elect。
⑷当名词同位语,如：● Tom had no idea which book to read first。
“特殊疑问词+动词不定式”的用法归纳
“特殊疑问词＋动词不定式”的用法归纳由两部分构成：疑问词和动词不定式（wh-+to do）。
疑问词部分包括疑问代词who, whom, what, which 和whose以及疑问副词when, where和how。
它主要具有以下几种功能：1. 作主语Where to look for him is a problem. 问题是到哪儿去找他。
2. 作宾语（1）作动词的宾语I can’t decide when to star t. 我不能决定何时动身。
（2）作介词的宾语I am thinking about how to deal with the problem. 我正在考虑怎样处理这个问题。
3. 作宾语补足语He taught me how to pronounce it. 他教我如何发音。
4. 作表语The main problem is whether to work in this company.最主要的问题是是否在这家公司工作。
“特殊疑问词＋动词不定式”考点归纳：1. “特殊疑问词＋动词不定式”的同意句转换。
如：I don’t know what I should do next.→I don’t know what to do next.我不知道接下来该怎么办。
Can you tell me how I can improve my English?→Can you tell me how toimprove my English? 你能告诉我怎样提高我的英语吗？The doctor told him when he should take the medicine. → The doctor told him when to take the medicine.医生告诉他什么时候吃药We can't decide when to start. →We can't decide when we should start.我们没有决定什么时候出发。
特殊疑问词动词不定式的用法归纳
特殊疑问词动词不定式的用法归纳动词不定式是英语中的一种非谓语动词形式，它由动词原形加上to 构成。
在句子中，动词不定式可以担任主语、宾语、表语、定语或状语等功能。
本文将归纳总结特殊疑问词与动词不定式的搭配用法。
1. 为什么（Why）a) Why + 动词不定式表示原因或目的- Why do you study English? (你为什么学英语？)- Why did she go to the hospital? (她为什么去医院？)- Why would he buy a new car? (他为什么要买一辆新车？)b) Why + 动词不定式表示建议或劝告- Why don't you ask for help? (你为什么不寻求帮助？)- Why not try something different? (为什么不试试不同的东西？)2. 什么时候（When）a) When + 动词不定式表示将来的动作或事件- When to start the meeting hasn't been decided yet. (会议何时开始还没有决定。
)- When to leave for the airport depends on the traffic. (去机场何时出发取决于交通。
)3. 如何（How）a) How + 动词不定式表示方式、方法或方式- How to solve this problem is yet to be determined. (如何解决这个问题还没有确定。
)- How to use this machine is explained in the manual. (如何使用这台机器在说明书中有解释。
)4. 为何（Why）a) Why + 动词不定式表示目的- Why take the risk if it's unnecessary? (如果没有必要，为什么冒险？) - Why waste time on something that doesn't matter? (为何在无关紧要的事情上浪费时间？)5. 何时（When）a) When + 动词不定式表示计划或打算- When to meet again will be discussed at the next meeting. (何时再次见面将在下次会议上讨论。
(完整版)特殊疑问词+动词不定式结构
“特殊疑问词＋不定式”的用法“疑问词+不定式”结构（question word + to-infinitive）4）疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（在作用上相当于一个名词性从句，名词成分）。
这种结构在句中可作主语、宾语、表语、复合宾语的直接宾语、状语、同位语等句子成分。
注意：疑问副词why 后不能跟动词不定式一、“疑问词+不定式动词”结构的几种功用：1）作主语Where to go is still a question. 到哪里去还是个问题。
（作主语时，谓语动词常用单数形式）When to hold the meeting has not yet been decided.Choosing what to eat is no longer as easy as it once was. 选择吃什么，已经不像以前那么...When to start has not been decided. 何时动身尚未决定。
What to read is an important question. 该读些什么是一个很重要的问题。
How to begin is more difficult than where to stop. 如何开始比到哪里停止还困难。
2）作宾语（作用相当于名词性从句）A. 用作动词宾语He asked how to open the box. 他询问如何打开盒子。
She couldn’t think what to say. 她想不出说什么。
He could not tell whom to trust.Our teacher explained how to use the word processor. 老师向我们说明如何使用文字处理机。
I know where to find the boy. 我知道到哪里能找到这个男孩。
特殊疑问词+动词不定式结构
特殊疑问词+不定式”的用法"疑问词+ 不定式"结构（question word + to-infinitive ）4）疑问代词who, what, which等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（在作用上相当于一个名词性从句，名词成分）。
这种结构在句中可作主语、宾语、表语、复合宾语的直接宾语、状语、同位语等句子成分。
注意：疑问副词why 后不能跟动词不定式一、疑问词+不定式动词”结构的几种功用：1）作主语Where to go is still a questio n.到哪里去还是个问题。
（作主语时，谓语动词常用单数形式）When to hold the meeti ng has not yet bee n decided.Choos ing what to eat is no Ion ger as easy as it once was. 选择吃什么，已经不像以前那么...When to start has not been decided.何时动身尚未决定。
What to read is an important question.该读些什么是一个很重要的问题。
How to begin is more difficult than where to stop. 如何开始比到哪里停止还困难。
2）作宾语（作用相当于名词性从句）A. 用作动词宾语He asked how to open the box.他询问如何打开盒子。
She couldn ' t think what to sa她想不出说什么。
He could not tell whom to trust.Our teacher explained how to use the word processor.老师向我们说明如何使用文字处理机。
(2021年整理)“特殊疑问词+动词不定式”的用法归纳
“特殊疑问词+动词不定式”的用法归纳编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（“特殊疑问词+动词不定式”的用法归纳）的内容能够给您的工作和学习带来便利。
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“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh—+to do）.疑问词部分包括疑问代词who, whom, what, which和whose以及疑问副词when，where和how。
此外，连接词“whether”也适用。
它主要具有以下几种功能:⑴当主语，如:● When to hold the meeting has not yet been decided。
● Wh ere to live is a problem.⑵当宾语,常接在forget， find out, discuss, decide， tell, teach， know, learn， wonder, remember等动词之后作宾语如：● We must know what to say at a meeting。
● He could not tell whom to trust.● Do you know how to play bridge？⑶当表语，如：● The pro blem is where to find the financial aid.● The question is who to elect。
⑷当名词同位语，如：● Tom had no idea which book to read first.● The question whether to confess troubled the girl.⑸用于宾语补足语，双重宾语.某些动词后可接“sb.+ 疑问词 + 不定式”构成的双重宾语，这类动词常用的有advise， ask， show， teach, tell等如：● I can tell you where to get this book。
特殊疑问词+动词不定式结构以及句法功能
“特殊疑问词＋动词不定式”的用法一、“疑问词+不定式”结构中。
疑问代词who, what, which 等和疑问副词when, where, how等后面跟不定式，以及连接副词whether与不定式连用构成不定式短语（这个不定时短语相当于一个名词）。
这种结构在句中可作主语、宾语、表语、宾语的补语，状语，同位语等句子成分。
注意：疑问副词why后不能跟动词不定式作主语Where to go is still a question. 到哪里去还是个问题。
（作主语，作主语时，谓语动词常用单数形式）Choosing what to eat is no longer as easy as it once was.选择吃什么,已经不像以前那么简单了。
作宾语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）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）作表语The question is how to learn English well.问题是怎样学好英语。
（作表语）作宾语补语I asked her how to learn English.我问她如何学英语。
（用双宾语，宾语补足语）做状语She was at a loss what to do.她不知如何是好。
（做状语）做同位语The question whether to confess troubled the girl.是否要坦白的问题使姑娘很烦恼。
（做同位语）I have no idea which one to take.我不知道拿哪个好。
（同位语）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。
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读书破万卷下笔如有神________________________ ________“特殊疑问词+动词不定式”的用法归纳由两部分构成：疑问词和动词不定式(wh-+to do)。
疑问词部分包括疑问一.代词who, whom, what, which 禾口whose 以及疑问畐U词when, where和how。
此外，连接词“ whether ”也适用.它主要具有以下几种功厶匕冃能：⑴当主语，如：• Whe n to hold the meeti ng has not yet bee n decided.• Where to live is a problem.forget, find out, discuss, decide, tell, teach, kno w, lear n,⑵当宾语，常接在wonder, remember等动词之后作宾语如:• We must know what to say at a meeti ng.• He could not tell whom to trust.• Do you know how to play bridge?⑶当表语，如：• The problem is where to find the financial aid.• The questi on is who to elect.⑷当名词同位语，如：• Tom had no idea which book to read first.• The questi on whether to con fess troubled the girl.⑸用于宾语补足语，双重宾语。
某些动词后可接“ sb.+疑问词+不定式”构成的双重宾语，这类动词常用的有advise, ask, show, teach, tell 等如：• I can tell you where to get this book.• I ask her how to lear n En glish.• He will advise you what to do.• Will you show me how to use the mach ine?(6)作介词宾语：某些介词后面可接疑问词+不定式作宾语，这类介词常用的有about, as, from, in, of, on,with等。
例如：He has no idea of how to an swer this questio n.题。
Della had only $1.87 with which to buy Jim a present. 他不知道怎样回答这个问德拉仅有$1.87为你有很多题目可以选来吉姆买一件礼物。
(which是关系代词)You have a nu mber of topics from which to choose.择。
（which是关）系代词读书破万卷下笔如有神_____________________ _______二“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 ril do next. = I don't know what to do next.The doctor told him whe n he should take the medici ne. = The doctor told him whe n to take the medic ine.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：Which to choose is importa nt. = Which we should choose is importa nt.The questi on is where to go. = The questio n is where we should go.三、“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？按照英语语法的习惯，疑问副词why后不直接跟动词不定式，如：误：I don't know why to choose that dict ion ary.正：I don't know why you must choose that dicti on ary.但它可以接不带to的动词不定式，即动词原形，构成why do sth./ why not do sth. 肯定形式是表示某动作是不必要的或没有意义的，而否定形式是表示向某人提建议和表达看法，相当于祈使句。
Today is Sun day. Why not go out to relax yourself?Why pay more at other shops? We have the best value.练习：1.1 have no idea when _______ her the bad news.A. will tellB. telli ngC. tellD. to tell2. —Will you please show me how to do the roleplay exercise?—Sure. Now let me tell you ____ first.A. which to doB. how to doC. whe n to doD. what to do3. I n eed your help because I don't know ___ .A. how to do itB. how to doC. what to do itD. what should I do4. —How are you feeli ng here?——It's quite hot. I don't know __ to go or stay.A. howB. whe nC. whetherD. whereIt's too hard. I don't know ____ to do with this maths problem. —5.读书破万卷下笔如有神—You can ask your classmates or teachers for help.A. whichB. howC. whatD. whe n6. —Millie, could you give me some advice? I don't know ____ .—Why don't you wear this red shirt?A. whe n to wearB. what to wearC. how to wearD. where to wear7. I'm going on a field trip but I have n't decided _________ .A. what to doB. to do whatC. where to goD. to go where8 —This physics problem is too difficult. Can you show me _______ , Wang Lin?—Sure.A. what to work it outB. what to work out itC. how to work it outD. how to work out it9. Excuse me. Would you please tell me _______ buy a digital cameraA. what toB. where toC. what I canD. where can I10. There isn't any differe nee betwee n the two. I really don't know ______ .A. where to chooseB. which to chooseC. to choose whatD. to choose which用“疑问词+不定式”改写下列句子。
1. How we should do it was discussed last ni ght.__________was discussed last ni ght.2. I did n't know where I should go.I did n't know ___________ .3. The difficulty was how we should cross the river.The difficulty was ____________ .根据汉语补全下列英语译文。
1. 何时动身还不知道。
____________ is unknown.2. 我忘了该怎么办。
I forgot __________ .3. 我可以告诉你哪里可以买到此书。
I can tell you _______ .4. Yao Mi ng未决定下一步做什么。
Yao Ming has n't decide____________ n ext.5.She has decided ____________ 到哪儿工作。
））childre n.怎样帮助 6.Bill Gates knew ____________ （读书破万卷下笔如有神_________________________________7.1 can't decide ___________ 是否踢足球）or do homework.8. Paul knows _________ 跟( 谁谈) for help.9. __________________________ You should decide 做( 哪个) first.10.Simon just forgot ___________ (什么时间接) his friend.仁爱版英语九年级上册Unit3 Topic3 测试题第二部分基础知识运用(55 分)I. 单项选择。
(10分)( )1. —This physics problem is too difficult. Can you show me ____ , Wang Li? —Sure.A.what to work it outB.what to work out itC.how to work it outD.how to work out it( )2.It is important ______ the piano well.A.of him to playB.for him to playC.of him playingD.for him to playing( )3.—Sorry, I can't follow you. I beg your pardon?A.You are welcome.B.That's all right.C.Not at all.D.No problem.( )4.The old farmer felt like ______ a big house very much.A.to getB.getC.gettingD.got( )5.She ______ walk at night. How brave she is!A.dare toB.dares toC.dare notD.doesn't dare to( )6.I will go to my doctor for ____ on healthy diet (饮食).A.an adviceB.some advicesC.any adviceD.some pieces of advice( )7.It's my honor _______ to give a talk here.A.to inviteB.to be invitedC.invitingD.invite( )8.I usually go to the movies with my parents, but ____ alone.A.some timesB.sometimeC.at timesD.at time( )9.If you want to learn English well, it's useful to ______ before class and ____ after class.A.review; previewB.preview; reviewC.review; to previewD.preview; to review ( )10.Listening, speaking and reading are all important ______ writing.A.besideB.besidesC.exceptD.expect 第三部分写作(25 分)I . 词汇。