动词不定式的用法(表目的)
动词不定式用法大全
动词不定式用法大全英语动词的非谓语形式为三种：动词不定式、动名词和分词。
非谓语动词没有人称和数的变化。
动词不定式是一种非谓语动词形式,其结构为“to＋动词原形”，其中to 不是介词,而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。
动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。
一. 作主语例如：To be a doctor is hard. 做医生很难。
To learn English well is not easy. 学好英语不容易。
To say is to believe.眼见为实。
动词不定式（短语)作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语,而把真正的主语－－动词不定式(短语）放在句子的后部。
例如上面的句子可以表示为：It is hard to be a doctor。
It is not easy to learn English well. 再如:It's important to plant trees in spring.如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for引导的短语,称为不定式的复合结构。
例：It’s good for us to read English aloud in the morning.对我们来说每天早晨大声读英语是很有益的.It is important for students to use English every day.对学生来说每天使用英语是很重要的.二。
作表语:（在形式上，位于系动词后的就是表语。
从含义上讲，表语是回答主语“是什么"或“怎么样"的语法成分。
)动词不定式（短语）作表语常用于系词be的后面。
例:His work is to drive a car. 他的工作是开车.My job is to feed animals. 我的工作是饲养动物。
动词不定式用法
动词不定式用法动词不定式是英语中的一种常见的动词形式，它被用来表示目的、意图、能力、愿望或建议等。
动词不定式通常由“to”和动词原形组成，如“to write”、“to read”、“to learn”等。
动词不定式在句子中可以作为主语、宾语、表语、定语或补语等。
一、作为主语动词不定式可以作为主语，通常用于形式主语的结构中，例如：To learn English is important for me.（学习英语对我来说很重要。
）To study hard is the key to success.（努力学习是成功的关键。
）To travel is my dream.（旅行是我的梦想。
）二、作为宾语1.作及物动词的宾语动词不定式可以作为及物动词的宾语，例如：I want to learn English.（我想学英语。
）She decided to go to Beijing.（她决定去北京。
）They plan to visit Paris next year.（他们计划明年去巴黎。
）2.作介词的宾语动词不定式可以作为介词的宾语，通常介词为“for”、“of”、“about”、“to”等，例如：She is good at singing and dancing.（她擅长唱歌和跳舞。
）3.作动词或动词词组的宾语动词不定式可以作为某些动词或动词词组的宾语，例如：He hopes to become a doctor in the future.（他希望将来成为一名医生。
）I expect to see you soon.（我期望很快能见到你。
）三、作为定语动词不定式可以作为定语，修饰一个名词或代词，例如：I need a book to read.（我需要一本书来读。
）This is a good place to live.（这是一个适合居住的好地方。
）He has a lot of work to do.（他有很多工作要做。
动词不定式用法归纳
动词不定式用法归纳动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to是其符号，它没有人称和数的变化。
动词不定式在句子中可以用作主语、表语、宾语、补足语、定语、状语等。
1、作主语· To be a doctor is hard. 做医生很难。
· To learn English well is not easy. 学好英语不容易。
· To say is to believe.眼见为实。
动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。
上面的句子可以改为：· It is hard to be a doctor. · It is not easy to learn English w ell. · It’s important to plant trees in spring. 如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for引导的短语，称为不定式的复合结构。
· It’s good for us to read English aloud in the morning. 对我们来说每天早晨大声读英语是很有益的。
· It is important for students to use English every day. 对学生来说每天使用英语是很重要的。
2、作表语在形式上，位于系动词后的就是表语。
从含义上讲，表语是回答主语“是什么”或“怎么样”的语法成分。
动词不定式（短语）作表语常用于系词be的后面。
· His work is to drive a car. 他的工作是开车。
· My job is to feed animals. 我的工作是饲养动物。
· Her ambition is to be a doctor. 她的理想是当医生。
动词不定式的用法总结
动词不定式的用法总结
1.作为句子的主语：
Ex: To study English is important for success.
2.作为句子的宾语：
Ex: I want to learn how to play the guitar.
3.作为动词的宾语补语：
Ex: She found it difficult to understand the instructions.
4.与一些动词连用，构成特定的动词短语：
Ex: I need to go to the store.
He wants to buy a car.
5.作为目的状语，表示动作的目的或意图：
Ex: He went to the library to study.
6.作为结果状语，表示结果或后果：
Ex: She studied hard to pass the exam.
7.作为方式状语，表示动作的方式或方法：
Ex: He walked slowly to avoid falling.
8.与形容词连用，表示主语的特征或状态：
Ex: She is happy to see her friends.
9.与副词连用，表示副词的程度或程度的变化：
Ex: He tried to be more careful.。
动词不定式作定语的用法
动词不定式作定语的用法动词不定式是英语中常用的一种短语结构，它可以作为定语修饰名词或代词。
动词不定式作定语的用法有多种，本文将介绍三种常用的结构和用法。
在使用动词不定式作定语时，需要注意时态、语态和逻辑关系的准确表达。
一、作目的状语的动词不定式动词不定式在句子中可以起到目的状语的作用，用于说明名词或代词的用途或目的。
例如：1. We need a tool to fix the broken chair.（我们需要一种工具来修理坏椅子。
）2. She bought a book to learn French.（她买了一本书来学法语。
）在以上两个例句中，不定式短语“to fix the broken chair”和“to learn French”分别作为定语修饰名词“tool”和“book”，表示工具的用途和书的目的。
二、作定语的动词不定式动词不定式也可以作为定语，修饰名词或代词，限定或补充名词的含义。
例如：1. The decision to cancel the meeting was unexpected.（取消会议的决定是出乎意料的。
）2. This is a good place to relax.（这是一个放松的好地方。
）在以上两个例句中，不定式短语“to cancel the meeting”和“to relax”作为定语修饰名词“decision”和“place”，起到进一步说明的作用。
三、作主动补足语的动词不定式动词不定式有时也用作主动补足语，将其前面的名词或代词与句子的谓语动词联系起来，说明名词或代词的动作、状态或性质。
例如：1. I have some letters to write.（我有几封信要写。
）2. She has many problems to solve.（她有很多问题要解决。
）在以上两个例句中，不定式短语“to write”和“to solve”作为主动补足语，与谓语动词“have”联系，表示目标动作或需要解决的问题。
动词不定式表目的4则
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动词不定式做状语时表示目的和结果的用法（一）动词不定式做状语时表示目的和结果用法总结1. 作目的状语:I came here to see you.T o stop the train, pull the lever downwards.目的状语还可以用如下表达法：肯定：toin order to + 动词原形so as toI come to see her. = I come in order to see her. = I come soas to see her.thatso that + 主语+ may/might + 动词原形I come that I may see her. = I come in order that I may see her. = I come so that I may see her.否定：not toin order not to + 动词原形so as not tothatso that + 主语+ may/might ++ 动词原形in order thatHe went away not to see me.= He went away in order not to see me.= He went away so as not to see me.= He went away in order that he might not see me.= He went away that he might not see me.= He went away so that he might not see me.in order to, in order that和so as to, so that的区别in order to可以用在句首或句末，但so as to只能用在句末。
动词不定式做状语时表示目的和结果的用法
动词不定式做状语时表示目的和结果用法总结1.作目的状语:I came here to see you.To stop the train, pull the lever downwards.目的状语还可以用如下表达法：肯定：toin order to + 动词原形so as toI come to see her. = I come in order to see her. = I come so as to see her.thatso that + 主语 + may/might + 动词原形in order thatI come that I may see her. = I come in order that I may see her. = I come so that I may seeher.否定：not toin order not to + 动词原形so as not tothatso that + 主语 + may/might + not + 动词原形in order thatHe went away not to see me.= He went away in order not to see me.= He went away so as not to see me.= He went away in order that he might not see me.= He went away that he might not see me.= He went away so that he might not see me.in order to, in order that和so as to, so that的区别in order to可以用在句首或句末，但so as to只能用在句末。
如：He got up very early in order to/so as to catch the first bus.In order to catch the first bus, he got up very early.（此时不能用so as to）so as to 和in order to的汉语意思应该是一样的“为的是，为了”。
英语动词不定式用法总结
动词不定式用法总结动词不定式在句中可充当主语、表语、宾语、宾补、定语和状语等。
一、作主语动词不定式作主语可位于句首。
例如：To learn a skill is very important for everyone.It is very important（for everyone）to learn a skill.也可使用it作形式主语，而将其置于句末。
例如：It is necessary （for young students）to learn a foreign language.动词不定式作主语的常用句型有：1. It is＋adj./ n. (＋for sb.／sth.) ＋to do sth.用于此句型的形容词有：easy, hard, difficult, possible, important, impossible, necessary, good, bad, exciting, interesting, surprising等。
例如：It is interesting to play this game.It is necessary for you to change your job.It was impossible for them to complete the task in such a short time.考例1：Is ____ possible to fly to the moon in a spaceship? (88 MET)A. nowB. manC. thatD. itIt is possible to fly to the moon in a spaceship.用于此句型的名词有：pity, shame, pleasure, one’s duty, one’s job, fun, joy, good manners, bad manners等。
初二表目的的动词不定式详解
know, wonder, decide, 注意：remember, learn, tell,
show, teach等
+疑问词＋to do
5. 作表语
用于be 动词后作表语 Eg. My wish is to become a college student.
The most important thing is to be honest.
6. 作状语
目的状语 to/in order to/ so as to He got up early to catch the early bus. =He got up early in order to catch the early bus. =He got up early so as to catch the early bus. = To catch the early bus he got up early. = In order to catch the early bus he got up early.
否定式的用法
表否定目的 not 在to 前
• in order not to do so as not to do • 注意 一般不用 not to do（表结果）
• in order not to be eaten by the panda， • Miss Bamboo runs quickly
2. To teach such a naughty boy is not easy. =
3. To give me the wrong number is careless of you. =
不定式表目的的用法
不定式表目的的用法
一、不定式表目的的用法
1、单独作表语
不定式单独作表语时，可表示某人所为某事的目的、用意或所希望的结果。
例如：
His aim is to do something good for the people. 他的目的是要为人民做些好事。
The object of his visit is to have talks with the government officials. 他来的目的是要同政府官员谈判。
2、与介词to连用构成短语
例如：
I’m here for the purpose of introducing our new product.我是为了介绍我们的新产品而来的。
He got up early in order to catch the earlybus. 他早起是为了赶早班车。
3、与相关动词连用
例如：
He stopped to ask for directions. 他停下来是为了询问方向。
He went out to buy some food. 他出去是为了买些食物。
4、与for连用
例如：
He stayed late for the purpose of finishing the report. 为了完成报告，他待了很晚。
5、与so as to连用
例如：
He got up early so as to catch the early bus. 他早起是为了赶早班车。
动词不定式6种用法总结
动词不定式6种用法总结动词不定式（infinitive）有以下六种基本用法：1. 作为动词的宾语：动词不定式可以作为另一个动词的宾语，例如：- I want to learn Chinese.（我想学中文。
）- She loves to dance.（她喜欢跳舞。
）2. 作为主语：动词不定式可以作为句子的主语，通常用于表达一般的动作、状态、观点等，例如：- To travel is my dream.（旅行是我的梦想。
）- To wait is boring.（等待很无聊。
）3. 作为表语：动词不定式可以作为动词 "be" 的表语，常用于表达目的、原因、结果等，例如：- The purpose of this meeting is to discuss the new project.（这次会议的目的是讨论新项目。
）- Her suggestion is to study harder.（她的建议是更加努力学习。
）4. 作为定语：动词不定式可以修饰名词或代词，通常用来表示目的、结果、用途等，例如：- The best way to learn a language is to practice speaking.（学习一门语言的最佳方法是练习口语。
）- He needs a pen to write with.（他需要一支可以写字的笔。
）5. 作为状语：动词不定式可以作为句子的状语，表示目的、结果、方式、条件等，常常与动词 "to be" 连用，例如：- She went to the supermarket to buy some groceries.（她去超市买些食品杂货。
）- He ran fast to catch the bus.（他跑得很快，以便赶上公交车。
）6. 作为补语：动词不定式可以作为某些动词的宾语补足语，常用于表示目的、愿望、需求等，例如：- They made her promise to come back.（他们让她答应会回来。
动词不定式用法
动词不定式用法动词不定式用法不定式是动词的一种非限定式，它是不受主语的单复数、人称、等的限定及影响的一种动词形式，但有时态和语态的变化。
一、动词不定式的基本结构动词不定式的基本形式为：to+动词原形，有时可不带to。
不定式的否定形式是：not to+动词原形。
在句中除不能作谓语外，其他成分都可作。
如：主语、表语、宾语、宾语补足语、定语和状语等。
注意：不定式之前的to（又称为小品词）与介词to的功能不同。
介词to之后要接名词或代词的宾格，或相当于名词的短语作它的宾语；而不定式符号to的后面需要跟动词原形。
speak to him (to 是介词) 对他讲话to speak English (to 是不定式的小品词) 讲英语二、动词不定式的用法不定式在句中有各种作用，一般可归类为三种基本用法：作名词，作形容词，作副词。
(一) 不定式作名词的用法不定式起名词作用，在句子中担当主语、表语、宾语和宾语补足语。
⒈作主语名词用法的不定式和名词一样，可担任句子的主语。
To grow more trees here is very important.(=It is very important to grow more trees here.) 在这里多种些树是非常重要的。
To hear your voice is so nice.(=It is so nice to hear your voice.) 听到你的声音真高兴。
To speak English well is not easy for me.(=It is not easy for me to speak English.) 把英语说好对我来说并不容易。
To walk to school takes me twenty minutes.(=It takes me twenty minutes to walk to school.) 步行到学校我要花20分钟。
动词不定式作状语的用法
动词不定式作状语的用法动词不定式是一种动词形式，在句子中可以作为状语来修饰谓语动词或者整个句子。
它通常由“to+动词原形”构成，但也有几个特殊的不定式形式，如及物动词的不定式可以省略to，或者不定式的否定形式为“not to+动词原形”。
在下面的文章中，我们将详细讨论动词不定式作状语的几种常见用法。
1. 作目的状语：不定式作为目的状语来表达一个动作或者目的的目的。
例句1：I went to the supermarket to buy some groceries.（我去超市买一些杂货）例句2：I study hard to pass the exam.（我努力学习以通过考试）在上述例句中，不定式“to buy”和“to pass”分别表示购买和通过的目的。
2. 作结果状语：不定式作为结果状语来表达一个动作或者事件发生的结果。
例句1：She ran too fast to catch the bus.（她跑得太快以至于没赶上公交车）例句2：He exercises regularly to stay healthy.（他定期锻炼以保持健康）在上述例句中，不定式“to catch”和“to stay”分别表示未能赶上和保持健康的结果。
3. 作方式状语：不定式作为方式状语来描述一个动作或者事件的方式。
例句1：He spoke in a soft voice to not disturb others.（他小声说话以免打扰其他人）例句2：They walked slowly to enjoy the beautiful scenery.（他们慢慢地走以欣赏美景）在上述例句中，不定式“to not disturb”和“to enjoy”分别表示不打扰和欣赏的方式。
4. 作条件状语：不定式作为条件状语来描述一个条件或者前提。
例句1：In order to pass the test, you need to study hard.（为了通过考试，你需要努力学习）例句2：To be successful, you have to work hard.（要成功，你必须努力工作）在上述例句中，不定式“to pass”和“to be successful”分别表示通过和成功的条件。
动词不定式的用法(表目的)
注意： 由in order to引导的目的状语，既可以 置于句尾，也可以置于句首。 e.g. They started early in order to get there in time. In order to get there in time, they started early.
Please go on to look at the sentences below. Pay attention to the colored words.
1.Kitty is preparing to go out next Sunday. 2.Kitty plans to take Linda out. 3.Linda wanted to visit the park.
a __
c to watch the birds. to learn more about them.
b __ d
to watch (watch) the birds. 1.People go to Zhalong________ to watch (watch) the 2.People go to Zhalong in order________ birds. to take 3.Many people take a camera ________(take) photos. 4.Many people take a camera in order _______ to take (take) photos. 5.He wrote down my name in order __________ not to forget (not forget) me. 6.She does her homework carefully in order not to make __________(not make) mistakes.
动词不定式用法
动词不定式用法动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。
动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。
一. 作主语：To be a doctor is hard.做医生很难。
To learn English well is not easy.学好英语不容易。
动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。
例如上面的句子可以表示为： It is not easy to learn English well. 再如：It’s important to plant trees in spring.如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for引导的短语，称为不定式的复合结构。
例：It’s good for us to read English aloud in the morning.对我们来说每天早晨大声读英语是很有益的。
It is important for students to use English every day.对学生来说每天使用英语是很重要的。
二. 作表语：动词不定式作表语常用于系词be的后面。
例： His work is to drive a car.他的工作是开车。
My job is to feed animals.我的工作是饲养动物。
Her ambition is to be a doctor.她的理想是当医生。
三. 作宾语动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin,start, want, forget, remember, show, learn, like, hate, love, ask等。
动词不定式表目的
为了将来更好地为人民服务，我们现在就该努 力学习。
4. He sent his sons to a boarding school in order/so as to enjoy some peace.
为了享受清净，e to see what would happen.
我留在那儿是为了看看要发生什么事。
2. To master English, you must devote a
great deal of effort on it.
为了掌握英语，你必须花大气力。
3. In order to serve the people better in the
5. The girl was so excited as to shout herself hoarse.
这个女孩是那么地兴奋，以至于嗓子都喊哑了。
三种形式的区别
in order to do/so as to do 比 to do 语 气更强烈，文体更正式。而so as to do 既可以表目的也可以表结果，判 断语意要结合具体语境。
动词不定式作目的状语通常意为“为了……”，主 要有三种形式：
结构形式 位置
说明
(not) to do…
in order (not) to do…
so as (not) to do
句首； 句中 句首； 句中
句中
位于句首时，强调目的
这种结构形式更能突出目 的性，为了表示强调，常 置句首
这种结构形式也是为了突出 状语目的性，与第二种结构 形式所不同的主要是位置的 区别
动词不定式作目的状语：
动词不定式作目的状语：动词不定式作目的状语动词不定式是英语中的一种特殊用法，常常用作目的状语来表达动作的目的或意图。
动词不定式作目的状语时通常放在句子中的谓语动词之后，用来回答“为了什么？”的问题。
动词不定式作目的状语的一种常见形式是“to + 动词原形”。
下面是一些示例：1. We study hard to pass the exam.（我们努力研究为了通过考试。
）to pass the exam.（我们努力学习为了通过考试。
）2. He bought a laptop to help him with his work.（他买了一台笔记本电脑为了帮助他的工作。
）to help him with his work.（他买了一台笔记本电脑为了帮助他的工作。
）3. She exercises every day to stay fit.（她每天锻炼为了保持健康。
）to stay fit.（她每天锻炼为了保持健康。
）除了使用不定式的“to”形式外，有时还可以使用动词不定式的“bare infinitive”形式。
下面是一个例子：4. I went to the store to buy some groceries.（我去商店买些杂货。
）to buy some groceries.（我去商店买些杂货。
）动词不定式作目的状语可以用于各种句子类型，包括肯定句、否定句和问句。
下面是一些例子：肯定句：- I study English every day to improve my language skills.to improve my language skills.- She works hard to achieve her career goals.to achieve her career goals.否定句：- He didn't go to the party to avoid crowds.to avoid crowds.- We didn't watch TV last night to save time for studying.to save time for studying.问句：- What did he buy the book for? - He bought the book to learn more about the subject.to learn more about the subject.动词不定式作目的状语的使用丰富了句子的表达方式，可以使句子更加准确和具体。
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3.Take a notebook with you in order not to forget the important things.
.
6
注意： 由in order to引导的目的状语，既可以 置于句尾，也可以置于句首。 e.g. They started early in order to get
colored words.
什么是动词不定式
1.Kitty is preparing to go out
(‘to-infinitives’)？
next Sunday. 2.Kitty plans to take Linda out. 3.Linda wanted to visit the park. 4.Sandy agrees to go with them. lie decided to stay at home.
birds. 3.Many people take a camera __to__ta_k_e__(take) photos.
4.Many people take a camera in order __to__ta_k_e_ (take) photos.
5.He wrote down my name in order _n_o_t_to__fo_r_g_e_t
.
1
sit play eat watch help
1. Jim plans _t_o__ea_t_ more fruit and
vegetables every day.
2. After dinner, we like _to__w_a_t_c_hTV and
chat there.
3. I love _t_o_s_i_t_ there and look out at the
there in time. In order to get there in time, they started early.
为了及时赶到那里，他们很早就出发了。
.
7
Amy is thinking about the things people do in Zhalong Nature Reserve. Match the first parts of the sentences on the left with the second parts on the right. Write the correct letters in the blanks.
beach and the sea.
4. Lucy wants _t_o_h_e_l_psick people.
5. I started _t_o_p_l_a_y__ the violin at the age
of six.
.
2
Please go on to look at the sentences below. Pay attention to the
.
11
e.g. 1.The policeman told the boys not to swim in the river. 2.The teacher asked the students to finish the homework on time. 3.Mr Wu advised us to read books aloud.
1. Mr Wu a_s_k_e_d_ us _to__w_e_a_r__ a pair of comfortable shoes because we would have to walk a long way. (ask/wear)
2. We __h_e_a_rd some birdss_i_n_g__ in the trees. (hear/sing) 3. Mr Wu t_o_l_d__ us _to__w_a_t_c_h__ the birds carefully. (tell/watch) 4. He also ___w__a_n_te_d__ us t_o__d_e_s_c_ri_b_e_ the birds. (want/describe) 5. He a_d_v_i_s_e_d_ us _n_o_t_t_o_s_h_o_u_tin the wetlands. (advise/not shout) 6. The cold weather __m_a_d_e__ some birds f_ly_____ south for the winter.
常跟不带to的动词不定式 作宾语补足语的动词有：感官动词hear, feel, see, watch, notice等；使役动词let, make和have。
make or let + object + infinitive without to
e.g. Max tells funny jokes and often
(make/fly) 7. The trip _h_e_l_p_e_d_ us( _to_)_l_e_a_rnmore about wildlife. (help/learn)
.
16
1. 我父亲经常鼓励我努力学习。 My father often encourages me to study hard.
makes me laugh.
Mr Wu agreed to let me join their
school trip.
.
13
see ,find, watch, feel, notice or hear +
object + infinitive without to
e.g. 1.She saw a baby panda drink her mother’s milk. 2. Millie and Amy heard someone sing in the park. 3. He always watch them play football.
(not forget) me.
6.She does her homework carefully in order _n_o_t _to__m_a_k_e_(not make) mistakes.
.
9
We add not before to-infinitives to express a negative meaning. e.g. We ask people not to catch birds for
killing bears. 3. Jim will go to the park ____to__fl_y____(fly) kites.
4.She will go to the supermarket _t_o_b_u_y______(buy) some bread.
5.He came to my home __to__p_la_y______(play) chess with me just now.
purpose. This is more formal than toinfinitives. (表达更正式，更清楚) 其否定式是 in order not to do sth
e.g. 1.Some people want to make the wetlands smaller in order to have more space for farms and buildings.
1 People go to Zhalong c__ a to take photshould read aboutd__ b to study the
the birds first
birds in the
wetlands.
3 Most People take a a__ c to watch the
Verbs+ to-infinitives
当句子中已经有谓语动词，而我们又要 表达不止一个动作概念时，其余的动词可 以使用非谓语形式表达。动词不定式 就是动词的一种非谓语形式，其肯定形 式是“to + 动词原形” （有时可以不带to， 其否定形式是 “not to + 动词原形”。 无人称、数和时态的变化。
We often use to-infinitives after these verbs.
agree learn like wish
choose decide
plan
prepare
start begin
try remember
hope want fail forget
+ to-infinitives 作宾语
6. We should act __t_o_p_r_o_te_c_t__（protect) wild animals.
Using to-infinitives for purpose 动词不定式作目的状语。
.
4
Using to-infinitives for purpose
We can use to-infinitives to express
any reason. He told me not to make much noise.
.
10
动词不定式作宾语补足语，有带to和 不带to的两种形式。
常跟带to的动词不定式作宾语补足语 的动词有：ask, tell, order, invite, get, allow, wish, want, encourage, advise, warn, would like, need, 等。
camera 4 The Birdwtching
birds.
b__ d to learn more