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高中英语动词不定式课件
动词不定式概述
一 不定式的体
1. 不定式的一般式(to do)表示不定式的.动作将要发生或与谓语动作同时发生.
2 不定式的进行体(to be doing)表示不定式的动作正在发生.
不定式的完成体(to have done)表示不定式的动作在谓语动作之前发生.
二 不定式的逻辑主语
1 不定式的逻辑主语常不出现在句中.
2 句子的主语,宾语有时是不定式的逻辑主语.
3 不定式前"for+名词/代词"结构中的名词或代词也可以用来表示不定式的;逻辑主语.
4 在"It+be+形容词+of+名词/代词+to do"结构中,名词或代词为不定式的逻辑主语.该结构中的形容词通常用来表示人的品质.例如:kind, good, nice, bad, cruel, honest, bold, thoughtful, right, wrong, wise, clever, silly, foolish, careless, rude等.
例如:It's very kind of you to cal to tell me about the conference.
三 不定式的否定式
不定式否定式由not/never +to do构成
四 不定式的句法功能
1 不定式做主语
1)To say something is one thing; to do it is another.
2)It is not a good idea to build houses along the lines where two of the earth's plates join together.
注:充当主语的不定式即可置于句首,位于谓语动词之前,也可作为句子的真正主语置于句末,用作形式主语.
2 不定式作表语
3)Her uncle seems to be acting rather strangely towards her these days.
4)The purpose of the fence is to keep out a type of wild dog called a "Dingo".
5)One suggested answer is for farmers to limit the number of their cattle.
注:充当表语的不定式一般位于be ,seem等系动词后.
3 不定式作宾语
6)Shylock agreed to lend Antonio money on one condition.
注:充当宾语的不定式位于及物动词后.常用不定式作宾语的动词有:agree, plan, determine, dare, refuse, hope, wish, expect, promise, choose, pretend, decide, manage, intend, offer, afford, demand.
7)The dusty air makes it difficult to get a clear picture of space.
注:充当宾语的不定式如果有自己的表语,则可用代替只个不定式作为形式宾语,而作为真正宾语的不定式则放在表语之后.以it作为形式宾语的这种结构常用在think, feel, find, make, consider等动词之后.
big and strong.
4 不定式作宾语补足语
8)The powder made from fish, blood and bones will make the cabbage plants grow big and strong.
9)Portia told Bassanio to go to his friend at once.
注:在下列动词后作宾语补足语的不定式通常不带to.这些动词是observe, notice, see, hear, watch, have, feel, make, let.但上述动词转换为被动语态时,其后的不定式须带to.例如:The cabbage plants will be made to grow
动词不定式(todo)是初中英语课的一个重点,也是中考要考查的一个项目。动词不定式属于非谓语动词的一种形式,很多同学经常把它和谓语动词混在一起,掌握起来有困难。下面我们对动词不定式的用法做简单归纳,帮助同学们记忆:
一、动词不定式在句子中不能充当谓语,没有人称和数的变化。
二、动词不定式是由“to+动词原形”构成(有时可以不带to)。动词不定式的否定形式是“not+动词不定式”(not不与助动词连用)。
三、动词不定式短语具有名词、形容词和副词等的功能,可在句中用做多种句子成分。
1、主语:常置于句末,而用it代替其做形式主语。
例:Togoinforsportshelpsyou
stayfit.(book4,L28)Ithelpsyoustayfittogoinforsports.Itisdangeroustoswiminthedeepseaonyourown.
注:此句式中不定式逻辑上的主语可由for或of引出,逻辑主语由of引出时,表语的形容词为kind,nice,good,polite,clever,foolish,right,wrong等表示
评价的形容词。例:It’srightofhimtorefusethe
invitation.(him为逻辑主语)
2、表语:Ourdutyistoprotecttheenviroment.
3、动词宾语:此种情况可按固定搭配或句式去记。
例:wouldyouliketoseemyphotos?Kevinplannedtovisithisuncle.(book4,L11)
和plan用法一样的词还有:start,want,agree,hope,begin,decide等。
Ifounditverydifficulttogeta
job.(it为形式宾语)4、宾语补足语:(1)在多数复合宾语及物动词后要带to:例:Iaskedafriendtoreadittome.(book4,L2)(2)在表示感觉、致使等意义的动词
(see,watch,hear,feel,notice,observe,
make,let,have,help等)后不带to。例:Theyheardhimsingapopsonginthemeetingroom.
5、定语:动词不定式做定语放在所修饰的名词的后面。
例:Vinnyisthefirstdisabledper鄄sontosailaroundtheworld.(book4,
L1)6、形容词补足语:在表示心理、感情、评价等的形容词后,对其进行补充说明。
例:Weareverygladtomeetyouagain.
7、状语:表示目的、原因、程度等。
例:Theybroughtinphotosoftheir
familiesformetolookat.(book4,L2)
8、“疑问词+不定式”用法:不定式前可带what,who,which,where,when,how等疑问词,这种不定式短语在句中多用做宾语。
例:Hedidn’ttellmewheretogo.9、在初中阶段还涉及到“不定式被动语态一般式(tobe+过去分词)”
例:Therearetwentymoretreestobeplanted.
解读动词不定式作主语、宾语、定语、状语
在中学教科书中,动词不定式是一个非常重要的语法点;在历年高考中,动词不定式是频频考查的要点之一;在学生的学习实践中,动词不定式是琐碎、难学的语法项目之一。为了更熟练、准确、有针对性地掌握此项语法知识,下面把(N)MET对动词不定式作主语、宾语、定语及状语的考查点进行总结、归纳。
I. 不定式作主语
1. 不定式作主语时,常用it作形式主语,而将作主语的不定式放在句子后部。例如:
It is good to help others.帮助他人是件好事。
It is exciting to surf the Internet.上网是件令人兴奋的事。
2. 不定式作主语与V-ing形式作主语的不同:前者作主语时,常表示某一次具体的动作;而后者常表示习惯性的动作。例如:
To teach the three children is my job this afternoon. 教这三个孩子是今天下午我的工作。
Walking is a good form of exercise. 散步是锻炼的一种好方式。
简析: It's ... of sb. to do sth.与It's... for sb. to do sth.
当表语形容词说明不定式的逻辑主语具有某种品质时,常用"It's...of sb. to do sth."。例如:
It's very kind / nice of you to help me。感谢你的帮助。
当表语形容词说明不定式具有某种特征时,应使用 "It's ...for sb. to do sth."。例如:
It's hard for the Chinese students to learn Russian. 中国学生学俄语是很难的。
[高考题例]
1. Is ________ necessary to complete the design before National Day?
A. this B. that C. it D. he
2. It was foolish ________ you to give up what you rightly owned.
A. for B. of C. about D. from
II. 不定式作宾语
1. 学习不定式作宾语时,要注意掌握四种动词:
1) 后接不定式作宾语的动词。常见动词有: offer, decide, hope, promise, agree, plan, manage, refuse, wish, pretend, learn, want等。
2) 后接V-ing形式作宾语的动词。常见动词有: enjoy, mind, suggest, advise, finish, practise, imagine, admit, avoid, delay等。
3)后接不定式和V-ing形式作宾语均可,且没有大的区别的动词。常见动词有: start, begin, continue等。
4)后接不定式和V-ing形式作宾语均可,但意思不同的动词。常见动词及短语有:try, remember, forget, regret, stop, go on等。例如:
Please remember to lock the door when you go out. 出去时请记住要锁门。
I don't remember lending you any money. 我不记得借过钱给你。
I regret saying what I said. I shouldn't have said it. 我后悔我所说过的话,我本不该说那些话。
I regret to tell you that you failed your driving test. 我很遗憾地告诉你,你没有通过驾驶测试。
The minister went on talking for two hours. 部长的讲话持续了两个小时。
After discussing the economy, the minister then went on to talk about foreign policy. 讨论完经济,部长接着谈论外交政策。
2. 动词不定式在句中作宾语,如带有宾语补足语时,要先用it作形式宾语,而将该不定式后置。例如:
I don't think it right to do it in that way.我觉得以那种方式去做是不恰当的。
I find it hard to get along with him. 我发现与他相处不是件容易的事。
3. "疑问代词、疑问副词 + 不定式"常常用作动词或介词的宾语。例如:
I don't know where to spend my holiday. 我不知该去哪儿度假。
Have you decided when to marry?你决定什么时候结婚了吗?
[高考题例]
3. She pretended ________ me when I passed by.
A. not to see B. not seeing C. to not see D. having not seen
4. Little Jim should love ________ to the theatre this evening.
A. to be taken B. to take C. being taken D. taking
5. -I usually go there by train.
-Why not ________ by boat for a change?
A. to try going B. trying to go C. to try and go D. try going
6. -Was the test difficult?
-Not at all. We found ________ .
A. it very easy for doing
B. very easy to do it
C. it very easy to do
D. it very easy to do it
7. -Do you know Mr. Smith?
-Yes. He's a strange man. We found ________ difficult to work with him.
A. us B. it C. him D. you
8. I don't think ________ possible to master a foreign language without much memory work.
A. this B. that C. its D. it
9. Last summer I took a course on ________ .
A. how to make dresses
B. how dresses be made
C. how to be made dresses
D. how dresses to be made
10. It is said in Australia there is more land than the government knows ________ .
A. it what to do with
B. what to do it with
C. what to do with it
D. to do what with it
III. 不定式作定语
不定式作定语时,应注意使用不定式的正确形式。请看下列句子:
I have a lot of work to do today. 我今天有很多工作要(自己)做。
I have a lot of work to be done today. 我今天有很多工作要(别人)做。
Do you have anything to take to your son? 你有什么东西要(自己)带给你儿子吗?
Do you have anything to be taken to your son? 你有什么东西(让别人)带给你儿子吗?
简析:当句子的主语是不定式的逻辑主语时,不定式使用主动式;当句子的主语不是不定式的逻辑主语而不定式与所修饰的名词或代词之间是被动关系时,不定式使用被动式。
IV. 不定式作状语
1. 不定式常常作目的状语、原因状语、结果状语等。不定式作状语时,要注意不定式的逻辑主语应与句子的主语保持一致。
[高考题例]
11. To be a great scientist, ________ .
A. maths is very important
B. maths is more important than other subjects
C. one must understand maths
D. maths is important to be understood
2. "主语+系动词+形容词+ to do sth."句式中,当形容词说明主语具有某种特征时,不定式不使用被动式。例如:
The naughty boy is hard to deal with.那个顽皮的男孩很难对付。
[高考题例]
12. Tom kept quiet about the accident ________ lose his job.
A. so not as to B. so as not to C. so as to not D. not so as to
有关动词不定式的语法题
1. 不定式定义:由to+动词原形构成。
不定式是一种非限定性动词。而非限定动词是指那些在句中不能单独充当谓语的动词,可分为不定式,动名词,现在分词和过去分词。
2.用途:
在句中不能作谓语。它具有动词的性质,本身可以带宾语和状语。
【动词不定式】
1.定义:动词 + 不定式
2.用途:
动词不定式在句中可以作句子任何成分。动词不定式的被动形式除了一般形式外还有其完成式和进行式。
[编辑本段][动词不定式的时态、语态]
动词不定式可以作以上各种成分,但它毕竟是动词,所以有动词的属性
动词不定式及其短语还可以有自己的宾语、状语,虽然动词不定式在语法上没有表面上的直接主语,但它表达的意义是动作,这一动作一定由使动者发出。这一使动者我们称之为 逻辑主语,其形式如下:
主动形式 被动形式
一般式 (not) to make (not) to be made
完成式 (not) to have made (not) to have been made
进行式 (not) to be making
完成进行式 (not) to have been making
(1)语态
如果动词不定式的逻辑主语是这个不定式所表示的动作的承受者,不定式一般要用被动语态形式。如:
It's a great honour to be invited to Mary's birthday party.(不定式作主语)
It was impossible for lost time to be made up.(不定式作主语)
I wish to be sent to work in the country.(不定式作宾语)
Can you tell me which is the car to be repaired?(不定式作定语)
He went to the hospital to be examined.(不定式作状语)
在There be结构中,修饰主语的不定式可用被动,也可用主动。如:There are still many things to t ake care of (to be taken care of).但有时两种形式表达的意思不同,如:These is nothing to do now.( We have nothing to do now.) There is nothing to be done now.(We can do nothing now.)
(2)时态
1) 现在时:一般现在时表示的动词,有时与谓语动词表示的动作同时发生,有时发生在谓语动词的动作之后。
He seems to know this.
I hope to see you again. = I hope that I'll see you again. 我希望再见到你。
2) 完成时:表示的动作发生在谓语动词表示的动作之前。
I'm sorry to have given you so much trouble.
He seems to have caught a cold.
3) 进行时: 表示动作正在进行,与谓语动词表示的动作同时发生。
He seems to be eating something.
4) 完成进行时:
She is known to have been wreaking on the problem for many years.
[编辑本段][疑问词+不定式结构]
疑问词who,what,which,when,where,whether,how后可接不定式构成不定式短语,在句中作主语、宾语、表 语等。如:
①When to leave for London has not been decided yet. (不定式在句子中做主语)
②Mr. Smith didn't know whether to leave or stay there. (不定式在句子中做宾语)
③I asked Professor Xu how to learn English well. (不定式在句子中做间接宾语)
④The question was where to get the medicine needed. (不定式在句子中表语)
以上例句中疑问词+不定式部分,均可转换为相应的从句形式。如:①When we shall leave…③…how I
could learn…
经常在这种结构中使用的动词有:consider,decide,discover,explain,find out,forget,hear,know,lea rn,observe,understand,wonder等。
[编辑本段][动词不定式的语法功能]
一、作主语
动词不定式作主语时,句子的谓语动词常用单数,其位置有以下两种:
(1)把不定式置于句首。如:
To get there by bike will take us half an hour.
(2)用it作形式主语,把真正的主语不定式置于句后,常用于下列句式中。如:
①It+be+名词+to do
It's our duty to take good care of the old.
②It takes sb+some time+to do
How long did it take you to finish the work?
③It+be+形容词+for sb+to do
It is difficult for us to finish writing the compositionin a quarter of an hour.
④It+be+形容词+of sb+to do
It is stupid of you to write down everything the teachersays.
⑤It seems(appears)+形容词+to do
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如何讲解动词不定式
动词不定式由to+动词原形构成。这里的to是不定式标志,没有词义。不定式具有名词、形容词或副词的某些语法功能,又有动词的时态和语态的特点及作用。 常见的形式如表所示(以及物动词do为例),不及物动词没有被动语态。 时态\语态 主动 被动 一般式 to do to be done 进行式 to be doing / 完成式 to have done to have been done 完成进行式 to have been doing / 1 有些动词可以用不定式作宾语,大致上有三种情况。 1) 有些及物动词用不定式作宾语,结构为动词+不定式。例如: afford aim agree arrange ask decide bother care choose demand desire determine elect endeavor hope fail help learn long 渴望 mean manage offer plan pretend refuse tend undertake expect hate intend 2)有些动词除了可以用不定式作宾语,还用不定式作补语,即有动词+宾语+不定式的结构。例如: ask choose expect help beg intend like/love need prefer prepare want wish 3) 有些动词或动词词组可以用动词+疑问词+不定式的结构作宾语。例如: decide know consider forget learn remember show, wonder find out tell inquire explain 2 不定式作补语 1) 有些有动词+宾语+不定式的结构。例如: advise allow cause challenge command compel drive 驱使 enable encourage forbid force impel induce instruct invite like/love order permit make let have want get warn persuade request send tell train urge 注意:有些动词如make,have,get,want等可用不定式作做宾补,也可用分词作宾补。现在分词表达主动,也表达正在进行,过去分词表达被动。 2) 有些有动词+宾语+不定式的结构,不定式的动词往往是be,不定式一般可以省去。例如: consider find believe think declare(声称) appoint guess fancy(设想) guess judge imagine know 3) 有些动词可以跟there +to be的结构。例如: believe expect intend like love mean prefer want wish understand 3 不定式作主语 不定式作主语,往往用it作形式主语,真正的主语不定式放至句子的后面。 但是,用不定式作主语的句子中还有一个不定式作表语时,不能用It is… to…的句型。另外,这样的句子,不能用动名词作表语。 4 It's for sb.和 It's of sb. 这样的句子中,由于表语形容词性质的不同,导致了不定式逻辑主语标志用for或of的区别。 1)for sb. 句型中的形容词一般为表示事物的特征特点,表示客观形式的形容词,如easy, hard, difficult, interesting, impossible等: 2)of sb句型中的形容词一般为表示性格,品德,心智能力,表示主观感情或态度的形容词,如good, kind, nice, clever, foolish, right。 用for还是用of 的另一种辨别方法: 用介词for或of后面的逻辑主语作句子的主语,用介词前边的形容词作表语,造个句子。如果通顺用of,不通则用for。 5 不定式作表语 不定式可放在be动词后面,形成表语。 6 不定式作定语 不定式做定语通常要放在被修饰的词后,往往表示未发生的动作。 7 不定式作状语 1)目的状语 常用结构为to do , only to do(仅仅为了), in order to do, so as to do, so(such)… as to…(如此…以便…)。 2)作结果状语,可以表示没有预料到的或事与愿违的结果,不定式要放在句子后面。 3) 表原因 4)表示理由和条件 .8 用作介词的to to 可以用作介词,也可用作不定式的标示。下面的to 都用作介词: admit to object to be accustomed to be used to stick to turn to开始 look forward to be devoted to pay attention to contribute to apologize to devote oneself to 9 省去to 的动词不定式 1) 情态动词 (除ought 外) 后。 2) 使役动词 let, have, make后,感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后。 注意:被动语态中不能省去to。 3) would rather,had better句型后 4) Why… / why no…句型后 5) help 后可带to,也可不带to, help sb (to) do sth: 6) but和except后。but前是实义动词do时,后面出现的不定式不带to。 7) 由and, or和than连接的两个不定式,第二个to 可以省去: 8) 通常在discover, imagine, suppose, think等词后作宾补时,可以省去to be。例如: He is supposed (to be) nice. 他应该是个好人。 10 动词不定式的否定式 在不定式标志to前加上not。 11 不定式的特殊句型too…to… 1)too…to 太…以至于…。 2) 如在too前有否定词,则整个句子用否定词表达肯定,too 后那个词表达一种委婉含义,意为"不太"。例如: 3) 当too 前面有only, all, but时,意思是:非常… 等于very。 12 不定式的特殊句型so as to 1) 表示目的;它的否定式是so as not to do。例如: 2) 表示结果。 13 不定式的特殊句型Why not "Why not +动词原形"表达向某人提出建议,翻译为:"为什么不……?" "干吗不……?"。 14 不定式的时态和语态 1) 一般式表示的动词,有时与谓语动词表示的动作同时发生,有时发生在谓语动词的动作之后,例如 2) 完成式表示的动作发生在谓语动词表示的动作之前。例如: 3) 进行式表示动作正在进行,与谓语动词表示的动作同时发生。 4) 完成进行式表示动作从过去开始并延续至说话的时候。例如: 15 动名词与不定式 1)动名词与不定式的区别: 动名词表达的是: 状态,性质,心境,抽象,经常性,已发生的 不定式表达的是: 目的,结果,原因,具体,一次性,将发生的。 2)有些动词如continue接不定式或动名词作宾语,意义大相径庭。
动词不定式的用法视频讲解
解读动词不定式作主语、宾语、定语、状语
在中学教科书中,动词不定式是一个非常重要的语法点;在历年高考中,动词不定式是频频考查的要点之一;在学生的学习实践中,动词不定式是琐碎、难学的语法项目之一。为了更熟练、准确、有针对性地掌握此项语法知识,下面把(N)MET对动词不定式作主语、宾语、定语及状语的考查点进行总结、归纳。
I. 不定式作主语
1. 不定式作主语时,常用it作形式主语,而将作主语的不定式放在句子后部。例如:
It is good to help others.帮助他人是件好事。
It is exciting to surf the Internet.上网是件令人兴奋的事。
2. 不定式作主语与V-ing形式作主语的不同:前者作主语时,常表示某一次具体的动作;而后者常表示习惯性的动作。例如:
To teach the three children is my job this afternoon. 教这三个孩子是今天下午我的工作。
Walking is a good form of exercise. 散步是锻炼的一种好方式。
简析: It's ... of sb. to do sth.与It's... for sb. to do sth.
当表语形容词说明不定式的逻辑主语具有某种品质时,常用"It's...of sb. to do sth."。例如:
It's very kind / nice of you to help me。感谢你的帮助。
当表语形容词说明不定式具有某种特征时,应使用 "It's ...for sb. to do sth."。例如:
It's hard for the Chinese students to learn Russian. 中国学生学俄语是很难的。
[高考题例]
1. Is ________ necessary to complete the design before National Day?
A. this B. that C. it D. he
2. It was foolish ________ you to give up what you rightly owned.
A. for B. of C. about D. from
II. 不定式作宾语
1. 学习不定式作宾语时,要注意掌握四种动词:
1) 后接不定式作宾语的动词。常见动词有: offer, decide, hope, promise, agree, plan, manage, refuse, wish, pretend, learn, want等。
2) 后接V-ing形式作宾语的动词。常见动词有: enjoy, mind, suggest, advise, finish, practise, imagine, admit, avoid, delay等。
3)后接不定式和V-ing形式作宾语均可,且没有大的区别的动词。常见动词有: start, begin, continue等。
4)后接不定式和V-ing形式作宾语均可,但意思不同的动词。常见动词及短语有:try, remember, forget, regret, stop, go on等。例如:
Please remember to lock the door when you go out. 出去时请记住要锁门。
I don't remember lending you any money. 我不记得借过钱给你。
I regret saying what I said. I shouldn't have said it. 我后悔我所说过的话,我本不该说那些话。
I regret to tell you that you failed your driving test. 我很遗憾地告诉你,你没有通过驾驶测试。
The minister went on talking for two hours. 部长的讲话持续了两个小时。
After discussing the economy, the minister then went on to talk about foreign policy. 讨论完经济,部长接着谈论外交政策。
2. 动词不定式在句中作宾语,如带有宾语补足语时,要先用it作形式宾语,而将该不定式后置。例如:
I don't think it right to do it in that way.我觉得以那种方式去做是不恰当的。
I find it hard to get along with him. 我发现与他相处不是件容易的事。
3. "疑问代词、疑问副词 + 不定式"常常用作动词或介词的宾语。例如:
I don't know where to spend my holiday. 我不知该去哪儿度假。
Have you decided when to marry?你决定什么时候结婚了吗?
[高考题例]
3. She pretended ________ me when I passed by.
A. not to see B. not seeing C. to not see D. having not seen
4. Little Jim should love ________ to the theatre this evening.
A. to be taken B. to take C. being taken D. taking
5. -I usually go there by train.
-Why not ________ by boat for a change?
A. to try going B. trying to go C. to try and go D. try going
6. -Was the test difficult?
-Not at all. We found ________ .
A. it very easy for doing
B. very easy to do it
C. it very easy to do
D. it very easy to do it
7. -Do you know Mr. Smith?
-Yes. He's a strange man. We found ________ difficult to work with him.
A. us B. it C. him D. you
8. I don't think ________ possible to master a foreign language without much memory work.
A. this B. that C. its D. it
9. Last summer I took a course on ________ .
A. how to make dresses
B. how dresses be made
C. how to be made dresses
D. how dresses to be made
10. It is said in Australia there is more land than the government knows ________ .
A. it what to do with
B. what to do it with
C. what to do with it
D. to do what with it
III. 不定式作定语
不定式作定语时,应注意使用不定式的正确形式。请看下列句子:
I have a lot of work to do today. 我今天有很多工作要(自己)做。
I have a lot of work to be done today. 我今天有很多工作要(别人)做。
Do you have anything to take to your son? 你有什么东西要(自己)带给你儿子吗?
Do you have anything to be taken to your son? 你有什么东西(让别人)带给你儿子吗?
简析:当句子的主语是不定式的逻辑主语时,不定式使用主动式;当句子的主语不是不定式的逻辑主语而不定式与所修饰的名词或代词之间是被动关系时,不定式使用被动式。
IV. 不定式作状语
1. 不定式常常作目的状语、原因状语、结果状语等。不定式作状语时,要注意不定式的逻辑主语应与句子的主语保持一致。
[高考题例]
11. To be a great scientist, ________ .
A. maths is very important
B. maths is more important than other subjects
C. one must understand maths
D. maths is important to be understood
2. "主语+系动词+形容词+ to do sth."句式中,当形容词说明主语具有某种特征时,不定式不使用被动式。例如:
The naughty boy is hard to deal with.那个顽皮的男孩很难对付。
[高考题例]
12. Tom kept quiet about the accident ________ lose his job.
A. so not as to B. so as not to C. so as to not D. not so as to
Key:
1-5 CBAAD 6-10 CBDAC 11-12 CB
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