初中生 动词不定式讲解
初中英语关于动词不定式的用法详解

初中英语关于动词不定式的用法详解在初中英语的学习中,动词不定式是一个非常重要的语法点。
掌握好动词不定式的用法,对于我们正确理解和运用英语句子有着至关重要的作用。
接下来,让我们一起详细了解一下动词不定式的用法。
动词不定式的构成很简单,就是“to +动词原形”,例如“to play”“to study”等。
但它的用法却多种多样。
一、作主语动词不定式作主语时,常常为了避免句子头重脚轻,常用 it 作形式主语,而把真正的主语——动词不定式后置。
例如:“It is important to learn English well”(学好英语很重要。
)这里真正的主语是“to learn English well”,“It”只是一个形式上的主语。
二、作宾语一些动词后需要接动词不定式作宾语,常见的有:want(想要),hope(希望),decide(决定),expect(期望),pretend(假装)等。
例如:“I want to go shopping this weekend”(这个周末我想去购物。
)“He decided to study harder”(他决定更努力学习。
)三、作宾语补足语有些动词后面需要接带 to 的动词不定式作宾语补足语,常见的有:ask(要求),tell(告诉),want(想要),teach(教),wish(希望)等。
例如:“My mother asks me to clean the room”(我妈妈叫我打扫房间。
)“The teacher tells us to read more books”(老师告诉我们要多读些书。
)四、作定语动词不定式作定语时,要放在被修饰的名词或代词之后。
例如:“I have a lot of homework to do”(我有很多作业要做。
)“There is no timeto waste”(没有时间可以浪费了。
)五、作状语1、目的状语动词不定式可以用作目的状语,表示某一动作或行为的目的。
初三英语动词不定式知识精讲

初三英语动词不定式【本讲主要内容】动词不定式【知识总结归纳】-.构成:to +动词原形二.特征:1.不定式具有名词、形容词和副词的特征,同时也保留动词的特征,它有自己的宾语和状语,来构成不定式短语。
eg .1want to go there by bike .2.动词不定式没有人称和数的变化,但有时态的变化。
(1)动词不定式的一般式:“to +动词原形”eg .I am glad to meet you again. I want to go to the concert.(2)动词不定式的完成式:“to have +动词的过去分词”。
eg .I am sorry to have kept you waiting for a 10ng time.二.用法:1.作主语(如果不定式短语过长,可以把此短语放在句尾,主语的位置可以用it来替换,叫做形式主语)eg .\ To go surfing is exciting .I It is exciting to go surfing .To set up the new building will take them a year and a half .It will take them a year and a half to set up the new building .To learn all the subjects well is important.It is important to learn all the subjects well.▲在it作形式主语的句子中,某些形容词之后,不定式之前常带有for sb,这类形容词有:easy, difficult, hard, interesting, necessary 等。
而在某些形容词之后,不定式之前常带有 of sb,这类形容词有:nice,good,kind,clever,foolish,careful,polite 等。
初中动词不定式完整ppt课件

但有的动词(如:need, want, require等)后面接动名词或动 词不定式作宾语均可。
在It + be + 形容词(easy, difficult, expensive等) + 不 定式句型中,动词不定式常用it 作形式宾语,而将真正的宾语 放到句子后面。
作定语
动词不定式作定语时,要放在被修饰的名词之后,表示与这个名词有逻辑上的动宾 关系,即不定式动词可以修饰的名词应是它的表语或宾语。
误用动词不定式的时态和语态
动词不定式的时态和语态需要根据句子的语境和上下文进行判断,但在 实际使用中,学生往往容易忽略这一点,导致时态和语态的错误使用。
注意事项
注意动词不定式的正确性
在使用动词不定式时,要确保其形式 的正确性,包括时态、语态、逻辑主 语等方面。
注意上下文语境
多练习、多积累
掌握动词不定式的用法需要大量的练 习和积累,因此学生应该多做相关练 习,多阅读相关材料,以便更好地掌 握这一语法点。
例如
They were watching TV at this time yesterday.(昨天这 个时候他们正在看电视)
语态的转换
1 2
主动语态 表示主语是动作的执行者
被动语态 表示主语是动作的承受者
3
动词不定式的语态转换
将主动语态的不定式改为被动语态的不定式,一 般在不定式前加to be,并将不定式的逻辑主语 作为被动语态的主语
04
动词不定式的省略和倒装
省略情况
当动词不定式在句子中作宾语补足语,表示的是一次性 的具体动作,且句子的主语和不定式的逻辑主语一致时, 可以省略to。
当动词不定式中的动词是be、have、助动词或情态动 词时,可以省略to。
初中英语语法精讲动词不定式用法

(一动词不定式用法动词不定式没有人称和数的变化,在句中不能独立作谓语。
但动词不定式具有名词、形容词和副词特征,在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。
另外,动词不定式具有动词特点,可以有自己的宾语和状语,组成动词不定式短语。
动词不定式的肯定形式是to+do;其否定形式是not to+do。
下面以动词不定式在句中的作用来予以详细说明。
1.作主语可以直接作主语。
如:To see is to believe.但在英语中,常用it作形式主语,真正的主语即动词不定式放在后面。
如:It's wrong to play tricks on other people.It's our duty to keep our environment clean and tidy.点击规律:动词不定式在句中作主语时,常放在It is +adj.(形容词+to do sth.或It is +n.(名词+to do sth.句型中,it仅作形式主语。
2.作宾语a.want,decide ,agree等动词后面跟并且只能跟不定式。
如:We agreed to start early.She wants to be a doctor.b.love,like ,begin,start,hate ,prefer等词后面可以接不定式。
点击规律:上述动词后面除接不定式外,还可以接动名词,意思无很大区别。
提示板:like doing指经常性动作,而like to do指一次性的动作。
如:I like swimming,but I don't like to swim now.我喜欢游泳,但我现在不想游。
c.stop,forget,remember,go on ,try等词或短语后面可以接不定式。
点击规律:上述动词后面接不定式和接动名词意思大不相同。
提示板:1stop to do sth.:停止一件事,去做另一件事。
初中英语动词不定式部分知识讲解及练习

动词不定式一. 定义:动词不定式是非谓语动词的一种,它没有人称和数的变化,在句子中不能独立作谓语,但它仍保持动词的特点,既可以有自己的宾语和状语。
同时动词不定式又具有名词、形容词、副词的特征,在句中可以作主语、表语、宾语、宾语补足语、定语和状语。
二. 动词不定式的构成:to+动词原形三. 动词不定式作宾语动词不定式作宾语的注意事项(6点)1.可以接带to的动词不定式作宾语的动词主要有:要求选择同意(ask, choose, agree),期望决定学习(expect, hope, decide, learn),宁可假装知道(prefer, pretend, know),希望想要愿意(wish, want, would like / love)。
如:1)We decided to talk to some students about why they go there.2)He prefers to eat white bread and rice.3)Id love to visit Mexico.2.动词decide, know, learn, show, teach, tell...,介词结构on...可用疑问词带to 的不定式短语作宾语,但why后面的不定式不带to。
如:1)Could you please tell me where to park my car?2)It gives advice on what to do in lots of different situations.3.动词feel, find, make, think等后面,可以用it作形式宾语代替真正的宾语——动词不定式,句子结构是...feel / find / make / ... it + adj. / n. + to do...。
如:I find it difficult to remember everything.4.既可接动词不定式又可接v_ing形式作宾语,意思差别不太大的动词有begin, start, like, love等。
初中英语动词不定式完整PPT 课件

5.I found the German language hard __D__.
A.learned
B. learning
C. to be learned D. to learn
6.—The light in the office is still on.
--- Oh, I forgot __C____.
2. Why (not) do sth.? 3. …prefer to do/prefer doing 4. …prefer + n./doing A +to + n./doing B 5. …prefer + to do A rather than (to) do B 6. …would rather (not) do sth. 7. …would rather do A than (do) B 8. …would rather + 句子(过去式)
morning till night.
A.havieen
C. to be
D. being
4.The Emperor ordered the wonderful cloth
__B___ for him without delay.
A.to have woven B. to be woven C. to be weaving D. to weave
I. promise, decide, hope, agree, + to do sth.
choose, fail, wish, learn
e.g. 1. He has promised to behave better later. 2. The boy decided not to become a sailor. 3. I hope to go to college.
动词不定式知识点详解(初中英语专项复习)8

动词不定式知识点详解(初中英语专项复习)考点1. 动词不定式作宾语(1)在动词want,hope,would like,decide,wish,choose,try,need等后常用动词不定式作宾语。
(2)think,find,feel,make后连接it + adj. + to do sth.構成“形式宾语+真实宾语”的用法。
考点2. 动词不定式作宾补(1)带to的不定式作宾补的动词有:ask,like,would like,teach,tell,want,help 等。
(2)省掉to的不定式作宾补的动词有:let,make,hear,see,notice,have,watch 等。
注:省掉to的不定式的句子变被动语态时,需要还原to。
考点3. 动词不定式作主语(1)动词不定式常用作句子的主语时,谓语动词用单数形式:To do sth. +谓语动词+adj. / n.。
(2)常用it作形式主语,而将不定式放在句子后面:It +谓语动词+adj. / n.+ to do sth.。
考点4. 动词不定式作定语(1)及物动词不定式作定语放在被修饰词之后:名词或代词+to do。
(2)若构成的不定式的动词为不及物动词时,其后加上相应的介词:名词或代词+to do (介词)。
考点5. 动词不定式与疑问词连用(特殊疑问词+动词不定式)在宾语从句中,若主从句的主语一致时,宾语从句可简化为“疑问词+to do sth.”,不定式可以和疑问代词(who,whom,whose,what,which)或疑问副词(when,where,how,why)连用构成不定式短语。
它们可以在句中作主语、宾语和表语。
巧记常见动词:学会忘记有难处(learn,forget)想知道就别来劝告(wonder,know,advise)展开讨论教人对付(show,discuss,teach)弄清楚才决定告诉(find out,decide,tell)When to start is not decided yet. 还没决定什么时候开始。
初中英语教学课件:动词不定式

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动词不定式的特征
动词不定式具有名词、形容词和副词的特征,可以
作主语、表语、宾语、宾语补助语、定语和状语。
句法作用
例
句
作宾语
作状语
作宾语 补足语 作定语
作主语
She wanted to borrow my CD player. They began to read and write.
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动词不定式不带to的情况
有一些动词后用作宾语补足语的不定式通 常不带to。
一类:感觉动词,如 see, hear ,watch,feel,notice等 I saw him come.我看见他来了。 I heard him sing .我听见他唱歌了。
另一类:某些使役动词,如 make ,let ,have等 Let go.让他走吧。
九年义务教育三年制初级中学英语
动词不定(The Infinitive)
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The Infinitive
动词不定式的基本形式 动词不定式的特征 动词不定式的否定形式 动词不定式和疑问句连用 动词不定式不带to的情况
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动词不定式的基本形式
(1)“to+动词原形”
(2)有时可以不带to
To learn a foreign language is not easy. To play in the street is dangerous.
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动词不定式的否定形式
由 “not +动词不定式”构 成
例如:Tell him not to be late. The policeman told the boys not to
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3. Charles Babbage is generally considered _____the first computer. (MET1998) A. to invent B. inventing
C. to have invented
C. having invented
4. Allen had to call a taxi because the box was _______ to carry all the way home. (MET2003)
2. 放弃吸烟是对的。
To give up smoking is right.
作宾语
1. Fred 没有钱,所以他决定找一份工作。
Fred didn’t have any money, so he decided to look for a job.
2. 他答应不告述任何人这事。
He promised not to tell anyone about it.
To do that sort of thing is foolish。 主语
动 词 不 定 式
I want to see you this evening.
宾语
All you have to do is to finish it quickly. 表语
We found a house to live in. 定语
作状语
He spoke loudly (so as / in order) to be heard. 目的状语. They jumped with joy to hear the news. 原因状语. I’m too tired to walk any further tonight. 结果状语
B. C. being taken
7.There are five pairs ___,but I’m at a loss which to buy.(1999上海高考) A. to be chosen B. to choose from
C. to choose
D. for choosing
8. ________late in the afternoon, Bob turned off the alarm. (2001年北京春季高考)
注意
B. 动词不定式的否定式只须在to
前加
not.
My father decided not to take up the job.
The teacher told us not to be late again.
注意
C. 带疑问词的动词不定式在to
前加疑问词。
Mr.Lin will teach us how to use the computer.
Mary wanted to use my bike, but I asked her not to ( use my bike).
动词不定式的时态
㈠. 一般式( to do ).
不定式的一般式所 表示的动作(状态) 同时(或几乎同时) 发生,或之后发生。
1. I opened the door to enter the room.
A. To sleep C. Sleep
B. Sleeping D. Having sleep
9. With a lot of difficult problems ________,the
newly-elected president is having a hard time.
(2002年上海春季高考)
动词不定式的时态
㈢.完成式(to have done)
如果谓语表示 的动作发生在 不定式之前。
1. I am sorry to have kept you waiting so long.
2. You seemed to have read the novel written by Mr. Smith.
A.to have played
C. to be played
B. to play D. to be playing
11. In order to gain a bigger share in the
international market, many state run companies are trying ______their products more competitive. ( 2002上海春季高考)
动词不定式的语态
㈠.主动式( to do / to be doing /to have done)
当不定式逻辑上的主语是不定式所表示的 动作的执行者时. 1. We want to learn English well. 2.Robert is said____abroad, but I didn’t know what country he studied in.(NMET99)
A.to make C. to have made
B. making D.having made
12. The teacher asked us_______so much noise. (2003北京春季高考)
A.don't make B. not make
C. not making
D. not to make
AБайду номын сангаас being badly treated
C. to be treated badly
B.treating badly
D. to have been badly treated.
高考题汇集:
1. The purpose of new technologies is to make life easier
作表语
1. 我的工作是教英语。
My job is to teach English.
2. 眼见为实。
To see is to believe.
作定语
1. 你有什么要说的吗?
Do you have anything to say?
2. Betty是第一个知道这真相的人
Betty was the first to know the truth
A. not to B. not to do C. not do it D. do not to
6. Little Jim should love _____ to the theatre this evening. (MET 97) A.to be taken B. to take
D. taking
6.—Would you be so kind
us out? ---With pleasure.
A. helping
B. in helping
A. settled
C.to settle
B. settling
D. being settled
10. She will tell us why she feels so strongly that
each of us has a role_____in making the earth a better place to live. (2003上海春季高考)
________ it more difficult. (MET99)
A. not make
C. not making
B. not to make
D. do not make
2. I’ve worked with children before, so I know what ______ in my new job. (NMET2000) A. expected C. to be expecting B. to expect D. expects
Can you tell me where to get the book?
注意
D. 作简短回答或避免不必要的重复时,
动词不定式常常省去to 后面的动词, 只保留to 。
A:Would you like to come to my party? B: Yes , I’d love to ( come to your party). Mary想用我的自行车,但我叫她别用。
2. Mr. Smith is going to attend the meeting to be held tomorrow.
动词不定式的时态
㈡.进行式( to be doing)
如果谓语表示的动作 (情况)发生时,不 定式所表示的动作正 在进行。
1. I am very glad to be working with you. 2. He is said to be coming.
She came here to study English. I warned the patient not to eat cold water after the operation. 状语
宾补
作主语
1.当今掌握一门外语真的很重要。
To master a foreign language is really important nowadays.
3. Not everybody has the ability A. of speak C. spoken
B. speaking D. to speak
4. Mary is always the first student teacher’s questions in class. A. rising C. rose
A. much too heavy
C. heavy too much
B. too much heavy
D. too heavy much