一、有些动词后只跟不定式作宾语，如：有些动词后只跟不定式作宾语(不能带动名词)，如：want想，wish希望，hope希望，manage对付、管理，demand要求，promise许诺，refuse拒绝，pretend假装，plan计划， offer提出，decide 决定，agree同意，expect期待，指望等。
她希望别打扰她。
She wishes to be alone.
我想把财产留给子女。
I wish to leave my property to my children.
我希望马上宣布胜利者的名字。
I hope to announce the winner shortly.
她尽管受到这些侮辱，还是忍着不发火。
In spite of the insults, she managed not to get angry.
我总算挣扎着上了楼。
I just about managed to get up the stairs.
她过问我的事情。
She demanded to know my business.
你保证把钱还我吗？
Do you promise to pay me back?
这辆汽车发动不了。
The car refused to start.
我不敢说我对此事的了解有他那样多。
I don't pretend to know as much as he does about it.
你打算什么时候休假？
When do you plan to take your holiday?
他提出要帮忙。
He offers to help.
他决定不单独去。
He decided not to go alone.
我们赞成早些开始。
We agree to start early.
不要指望一个星期就学会一门外语。
You can’t expect to learn a foreign language in a week.
二、有些动词后只跟动名词作宾语，如：admit允许，承认；appreciate欣赏，感激；avoid避免；consider考虑；delay延迟；dislike讨厌；enjoy享受；escape 逃跑；excuse辩解；finish结束；forgive原谅；imagine想象；keep保持；mind介意；miss错失；practise练习；resist抵抗；risk冒险；suggest建议；deny否认等
三、有些动词后既可以跟不定式又可以跟动名词，意义上无多大区别，如：love，like，hate，prefer，intend，start，continue等。
I intend to finish／finish- ing the task this morning．
四、有些动词后既可以跟不定式，又可以跟动名词，但意义上有区别，如：forget，remember，mean，regret，stop，try等。
forget to do忘记要去做某事。(未做)
forget doing忘记做过某事。(已做)
The light in the office is stil on. He forgot to turn it off.
办公室的灯还在亮着，它忘记关了。(没有做关灯的动作)
He forgot turning the light off.
他忘记他已经关了灯了。 ( 已做过关灯的动作)
Don't forget to come tomorrow.
别忘了明天来。 (to come动作未做
remember to do 意思是记住去做某事,表示这件事情还没有做. remember doing 意思是记得做过某事,表示这件事情还已经做了Remember to turn off the lights when you leave the room.
在你离开房间之前,记得把灯关了.(现在还没有关灯)
I remembered tuning off the lights when I left the room.
我记得我关灯了,当我离开房间的时候.(灯已经关了)
regret to do对要做的事遗憾。(未做)
regret doing对做过的事遗憾、后悔。(已做)
I regret to have to do this, but I have no choice.
我很遗憾必须这样去做，我实在没有办法。
I don't regret telling her what I thought.
我不为告诉她我的想法而后悔。
mean to do打算、想
mean doing意味着
I mean to go, but my father would not allow me to.
我想去，但是我父亲不肯让我去。
To raise wage means increasing purchasing power.
赠加工资意味着增加购买力。
stop to do停止，中断做某事后去做另一件事。
stop doing停止做某事。
They stop to smoke a cigarette. 他们停下来，抽了根烟。
I must stop smoking. 我必须戒烟了。
try to do努力，企图做某事。
try doing试验，试着做某事。
You must try to be more careful.
你可要多加小心。
I tried gardening but didn't succeed.
我试着种果木花卉，但未成功。
go on to do做了一件事后，接着做另一件事。
go on doing继续做原来做的事。
After he had finished his maths，he went on to do his physics. 做完数学后，他接着去做物理。
Go on doing the other exercise after you have finished this one. 作完这个练习后，接着做其他的练习
cease to do长时间，甚至永远停做某事。
cease doing短时停止做某事，以后还会接着做。
That department has ceased to exist forever.
那个部门已不复存在。
The girls ceased chatting for a moment when their teacher passed by.
姑娘们在老师走过时，停了会聊天。
be afraid to do不敢，胆怯去做某事，是主观上的原因不去做，意为"怕"；
be afraid of doing担心出现doing的状况、结果。doing 是客观上造成的，意为"生怕，恐怕"。
She was afraid to step further in grass because she was afraid of being bitten by a snake.她生怕被蛇咬着，而不敢在草丛中再走一步。
She was afraid to wake her husband.她不敢去叫醒她丈夫。
She was afraid of waking her husband.她生怕吵醒她丈夫。
interested to do对做某事感兴趣，想了解某事。
interested in doing对某种想法感兴趣，doing 通常为想法。
I shall be interested to know what happens.我很想知道发生了什么事。(想了解)
I'm interested in working in Switzerland. Do you have any idea about that?我对在瑞士工作感兴趣。你想过这事吗? (一种想法)
begin / start to do sth
begin / start doing sth.
1)谈及一项长期活动或开始一种习惯时，使用doing.
How old were you when you first started playing the piano?
你几岁时开始弹钢琴？
2)begin, start用进行时时，后面动词用不定式to do
I was beginning to get angry。
我开始生起气来。
3)在attempt, intend, begin, start 后接know, understand, realize这类动词时，常用不定式to do。
I begin to understand the truth。
我开始明白真相。
4)物作主语时
It began to melt.
龙源期刊网 https://www.doczj.com/doc/bd3101015.html, 动名词与动词不定式用法例析 作者：朱小峰 来源：《初中生世界(初二年级)》2007年第01期 英语中某些动词后可跟动名词或动词不定式，有时两者意思差别不大，有时却截然不同。现分别例析如下： 一、两者意思相似，但稍有差别 1．start／begin doing sth．(或to do sth．) 析：start／begin doing sth．与start／begin to do sth．两者均表示“开始做某事”，一般可通用，但指开始一项长期或习惯的活动时，多用doing形式，例如： (1)I started／began learning(或to learn)English in 1992． 我学英语开始于1992年。 (2)How old were you when you first started playing football? 你第一次踢足球时多大? 2．like doing sth．(或to do sth) 析：like doing sth．与like to do sth．两者均表示“喜欢做某事”，有时可以通用，但表示一般性或抽象的多次性行为多用doing形式；表示某一特定场合具体的动作时，多用to do形式。类似此用法的动词还有hate(憎恨)，love(爱、喜欢)，prefer(更喜欢)等，例如： (1)For example，Lily likes to dance(或dancing)，but I like to sing(或singing)． 例如，莉莉喜欢跳舞，但我喜欢唱歌。 (2)He likes(hates)swimming，but he doesn’t like(hate)to swim today． 他喜欢(讨厌)游泳，但他今天不喜欢(讨厌)游泳。
不定式和动名词做主语的区别 不定式和动名词都可在句子中作主语，一般说来, 有下面几点须给予注意： (1)不定式一般表示具体的、特定的行为，通常表示一种意愿、目的或者未完成的事情。；而-ing分词一般表示抽象的、一般的行为通常表示已经知道的事实或者经验。 如： To complete the program needs much effort. 完成这项计划需要很大的努力。 Riding a bike can make a man smart. 骑单车能使一个人敏捷。 (2)在疑问句中，只能用动名词的复合结构作主语。如： Is his speaking reasonable? 她的说话有道理吗？ (3)在某些句型中通常要用动名词短语作主语。如：It is no use doing…/ It is no goo d doing…/ It is useless doing…/ It is worthwhil e doing…如： It is no use talking your trouble to a man like him. 跟他那样的人谈你的烦恼没有用。 (4)一般说来，作主语和表语的非谓语动词形式应一致，即：或同时为不定式，或同时为-ing分词。如： Seeing is believing. 眼见为实(from https://www.doczj.com/doc/bd3101015.html,)。 但是，在现代英语中，当表语用来说明主语的特定意义或具体内容时，主语和表语的非谓语动词的形式可以不一致，即，主语用动名词，而表语用动词不定式。如：Waving your hand is to say “Good-bye”. 挥手就是说“再见”。 Nodding your head is to say “Yes”. 点头就是说“对，是的”。
接不定式和动名词含义不同的动词 1. remember(记得)，forget(忘记)，regret(后悔)后接不定式指该不定式所表示的动作还未发生，后接动名词(有时可用完成式)，则指该动名词所表示的动作已经发生。比较。如：Remember to post the letter. 记住把这封信寄了。(“寄信”未发生) I remember posting the letter. 我记得寄了那封信。(“寄信”已发生) He forgot to pay me the money. 他忘记要给我付钱了。(“付钱”未发生) He forgot paying me the money. 他忘记曾给我付过钱。(“付钱”发生了) 2. try 后接不定式表示设法做某事，接动名词表示做某事试试(看有什么效果)。如： I’ll try to come tomorrow. 我明天设法来。 Let’s try knocking at the back door. 咱们敲敲后门试试。 3. mean 后接不定式表示打算(想要)做某事，接动名词表示意味着(要)做某事。如： He means to be a teacher. 他打算当老师。 He did not mean to hurt you. 他不是有意要伤害你。 This illness will mean going to hospital. 得了这种病就意味着要住院。 4. stop 后接动名词表示停止做某事，接不定式表示停下正在做的事去做另一事。如： He stopped speaking, and there was not a sound in the room. 他停止讲话，房里一点声音也没有了。 He stopped to listen, but there was no more sound. 他停下来听，但再也没有听到什么声音。 【注】后接不定式时，不定式不是宾语，而是目的状语。 5. can’t help后接动名词表示禁不住去做某事，接不定式表示不能帮助做某事。如： He couldn’t help crying when he heard the news. 他听到这个消息时禁不住哭了。 The medicine can’t help to get rid of your cold. 这药不能帮你治好感冒。 6. go on 后接不定式表示做完某事后接着做另一事，接动名词表示继续做正在做的事。如： You oughtn’t to go on living this way. 你不应该再这样生活下去了。 Go on to do the other exercises after you have finished this one. 做完这个练习后, 请接着做其他的练习。 【注】也人认为go on doing sth中的doing是现在分词而不是动名词。
动词不定式、动名词的用法和区别 动词不定式：动词不定式是由to + 动词原形构成，在句中起名词，形容词和副词的作用，可以担任除谓语以外的其它任何成分。 1. 动词不定式作主语： To mast a language is not an easy thing. / To teach English is my favorite. 动词不定式作主语时可以放在后面，而用it 作形式主语放在原主语的位置上。 It's very kind of you to have given us much help. 2. 动词不定式作宾语： 某些及物动词可以用动词不定式作宾语，这些动词有decide, begin, help, begin, want, wish, like, forget, learn, ask. I like to help others if I can. 3. 动词不定式作宾语补语。 We expect you to be with us. 我们希望你和我们在一起。/ Please ask him to come here quickly.请叫他快过来。 4. 动词不定式作表语： What I should do is to finish the task soon. / The most urgent thing is to find the boy immediately. 5. 动词不定式作定语： There are many ways to solve the problem. / I have something important to tell you. 6. 不定式作状语： We went to the hospital to see our teacher. / She is making a test to get a kind of useful medicine from a Tibet flower. 动词不定式的否定形式：not + to + 动词原形 The teacher told us not to swim in that river. 老师告诉我们不要在那条河里游泳。 It's unfair not to tell us. 没告诉我们真是不公平。 带疑问词的不定式： 疑问词who, what,which,when, where, how, why 可以加在不定式的前面，构成不定式短语，使含义更加具体。Where to go is not known yet. I don't know when to begin.。 Can you tell me where to get the battery. Do you know how to get to the station. 带逻辑主语的不定式： 动词不定式可以带有自己的逻辑主语，构成方法是：for + 逻辑主语+ 不定式。 注意：逻辑主语用宾格形式，for 本身无实际意义，它只表明后面的主语从逻辑上分析是不定式的主语。 It's necessary for us to help each other. / There are much work for me to finish, 动词不定式的被动形式：表示不定式动词同所修饰的名词是被动关系。 He is the man to be examined. 他是受检查的人。/ There are much work to be done. 有好多工作要做。 ●动名词 动名词是由动词原形+ ing 构成，同现在分词形式一样，在句中可作主语，宾语，表语和定语。 1) 动名词作主语： Talking like that is not polite. / Learning from others is important . / Putting on more clothes is not so good . （注：动名词可以象动词不定式一样，用it作形式主语，而把动名词写在后面做真正的主语。）It's no use waiting here, let's go home. / It's very difficult climbing this mountain. 2) 动名词作表语 The nurse's job is looking after the patients. 3)动名词作宾语 有些动词须用动名词来作宾语,它们是begin, mind, suggest, finish, stop, need, enjoy, miss, keep. Please stop smoking in the house. / I like reading in the forest. / Do you mind my opening the windows? 4）动名词作定语 She is studying in the reading room. / He slept in the sleeping bag. （动名词的否定形式：not + 动名词） He pretend not knowing it at all. 他假装全然不知。/ We considered not doing it now. 我们考虑现在不做这件事。 动名词的被动形式：当动名词和它的逻辑主语是被动关系时，用动名词的被动形式来表示。）His being looked down upon made him sick. / I can't really stand being treated like that.
动词不定式和动名词是英语非谓语动词的两个重要部分 一、作主语 1、不定式作主语：动词不定式可直接用作主语, 句子的谓语动词常用单数。 To get there by bike will take us half an hour. 对于主语较长的不定式，可以用it 作形式主语。例如： It's our duty to take good care of the old.How long did it take you to finish the work It is difficult for us to finish writing the composition in a quarter of an hour. It seemed impossible to save money.It's kind of you to help me with my English. 2、动名词作主语：动名词也可直接用作主语，或者用it 作形式主语。例如： Learning without practice is no good.It's no good reading in dim light.It's no use sitting here waiting.It's dangerous swimming in the sea in windy days.There is no saying what will happen next. 3、动词不定式和动名词作主语的区别 (1)不定式作主语经常表示具体动作，或者表示将要进行的动作。而动名词作主语经常表示 抽象的一般性的动作。例如：It's no good for you to eat so much fat. ( 有具体的人for you) It's no good eating too much fat. ( 泛指 ) (2) 不定式的逻辑主语常用 of, for 表示；动名词逻辑主语则常用物主代词、名词、代词表示。例如：It is stupid of you to write down everything the teacher says. (of you) It's no use your pretending that you didn't know the rules. (your) The doctor suggested them having their health check-up once a year. 二、作宾语 1、不定式作宾语 (1) 以下动词后 , 一般只用不定式作宾语 .如 :agree, attempt ， apply， ask, aim, arrange, beg ，choose, decide, demand, expect, fail , help, hope, lean, long, manage, offer, plan, prepare, pretend, promise, refuse, wish afford 等。 I decided to ask for my money back. I decided that I would ask for my money back. When our visit to the farm was over, we expected to start back on foot. When our visit to the farm was over, we expected that we would start back on foot. (2)不定式可先用 it 做形式宾语。 2、动名词作宾语 (1)以下动词后 , 一般只用动名词作宾语 , 如 :admit, appreciate, consider, delay, enjoy, finish, keep, imagine, mind, miss, practise, resist, risk, save, suggest, don't mind, give up, insist, on, put off 等。 I suggest spending our summer vacation in a seaside town. You must give up smoking, for it does too much harm to your health. (2)介词后只能接动名词做宾语 I should go to attend the birthday celebration instead of staying at home. What about inviting Li Jun to make a speech (3)少数特殊结构中只用动名词做宾语。它们可以看作是省略的介词的形式。例如： have difficulty prevent/stop (in) doing sth. have ? (from) doing sth. no trouble (in) doing sth.lose no ti me (in) there is no use (in) doing sth. doing sth. 3、不定式与动名词做宾语的区别 (1)动词后是接不定式还是动名词作宾语，主要是根据使用习惯。有些动词后一般只接不定
动名词作主语和动词不定式做主语的区别? 动词不定式与动名词的区别：）to+V 放句首为动词不定式，用法与V+ing差不多，多用于后面所说的事情还没有发生。例：To be a author is my dream. V+ing 放句首是动名词，其相当于名词，例：Doing lots of exercise is good for health. 一般来讲，to+ v. 表主动，表将来，表一次行动作。-ing 表主动，表进行。动词不定式与动名词的一些用法：）不定式与动名词都可以在句中作主语、宾语、表语和定语,但用法不尽相同。1．作主语一般情况下,不定式与动名词作主语可以互换,也常常可以用it充当形式主语,而把不定式和动名词放在句子的后半部分。但二者也有区别,不定式常常指某次具体的、将要发生的行为;而动名词则表示一般的、抽象的行为。例如: To save money now is not easy. 现在攒钱不容易。Saving money is a good habit. 攒钱是个好习惯。2．作定语不定式多为后置定语,动名词多为前置定语;不定式多表示将来的动作,动名词只能表示事物的属性、用途等。例如: He is looking for a room to live in.他正在找一间房子去住。Take these sleeping pills and you\'ll sleep better. 吃了这种安眠药,你会睡得更好。3．作宾语：有些动词后只能跟不定式作宾语,不能跟动名词作宾语;有些动词后常跟动名词作宾语,不能跟不定式作宾语;有些动词后跟不定式和动名词作宾语皆可, 1、动名词做主语往往表示普通的、一般的行为，不定式做主语常表示某次具体的行为。例 如：Collecting inform ation about children’s health is his job. 收集有关儿童健康的信息是他的工作。It’s necessary to discuss the problem with an experienced teacher. 与一位有经验的老师讨论这个问题是有必要的。2、常用不定式做主语的句型有：（1）It’s difficult (important, necessary) for sb. to do （2）It’s kind (good, friendly, polite, careless, rude, cruel, clever, foolish, brave) of sb. to do. 3、常用动名词做主语的句型有：It’s no good (use, fun) doing. It’s (a) waste of time one’s doing.另:1)动名词作主语通常表示抽象动作；而不定式作主语表示具体动作。Smoking is prohibited(禁止)here．这里禁止抽烟。(抽象) It is not very good for you to smoke so much．你抽这么多烟对你身体很不好。(具体) (2)动名词作主语时，通常用以表示一件已知的事或经验。 不定式短语通常用来表示一件未完成的事或目的。Climbing mountains is interesting．爬山很有趣。(经验) Driving a car during the rush hour is tiring．在高峰时刻开车令人厌烦。(经验) (3）不定式做主语，一般用it当形式主语，把作主语的不定式短语后置。It took me only five minutes to finish the job. Ⅰ.动名词和不定式做主语的相同点 1.不定式短语和动名词做主语时，常常为了保持句子的平衡，用it来做形式主语，如： It is not easy to learn English well. It is no use asking him for help. 2.如果主语用了不定式,表语和宾语也要用不定式;主语用了动名词,表语和宾语也要用动名词,这在英语中称为对称性,如: To see is to believe. = Seeing is believing. (眼见为实) It is better to stay home than _A__ out. A. to go B. going C. go D. gone
动词不定式语法单选题 【真题在线】 1. Do let your mother know all the truth. She appears ________ everything. A. to tell B. to be told C. to be telling D. to have been told 2. I feel it is your husband who ________ for the spoiled child. A. is to blame B. is going to blame C. is to be blamed D. should blame 3. In order to gain a bigger share in the international market, many state-run companies are striving ________ their products more competitive. A. to make B. making C. to have made D. having made 4. An army spokesman stressed that all the soldiers had been ordered ________ clear warnings before firing any shots. A. to issue B. being issued C. to have issued D. to be issued 5. It was unbelievable that the fans waited outside the gym for three hours just ________ a look at the sports stars. A. had B. having C. to have D. have 6. Energy drinks are not allowed ________ in Australia but are brought in from New Zealand. A. to make B. to be made C. to have been made D. to be making 7. There is nothing more I can try ________ you to stay, so I wish you good luck. A. being persuaded B. persuading C. to be persuaded D. to persuade 8. If there's a lot of work ________, I'm happy to just keep on until it is finished. A. to do B. to be doing C. done D. doing 9. David threatened ________ his neighbor to the police if the damages were not paid. A. to be reported B. reporting C. to report D. having reported 10. Thai is the only way we can imagine ________ the overuse of water in students' bathrooms. A. reducing B. to reduce C. reduced D. reduce 11. Today we have chat rooms, text messaging, emailing… but w e seem ________ the art of communicating face-to-face. A. losing B. to be losing C. to be lost D. having lost 12. The students are looking forward to having an opportunity ________ society for real-life experience. A. explore B. to explore C. exploring D. explored 【随堂检测】 (A)
不定式和动名词作主语的区别： (1) 动名词作主语通常表示抽象动作；而不定式作主语表示具体动作。 Smoking is prohibited(禁止)here．这里禁止抽烟。(抽象) It is not very good for you to smoke so much．你抽这么多烟对你身体很不好。(具体) (2) 动名词作主语时，通常用以表示一件已知的事或经验。不定式短语通常用来表示一件未完成的事或目的。 Climbing mountains is interesting．爬山很有趣。(经验) Driving a car during the rush hour is tiring．在高峰时刻开车令人厌烦。(经验) To finish the task will take a long time.要完成这项任务将要花费很长时间。（具体） (3) 不定式做主语，一般用it当形式主语，把作主语的不定式短语后置。 It took me only five minutes to finish the job. （4）动名词做主语往往表示普通的，一般的行为；不定式作主语常常表示某次具体的行为。 Collecting information about children's health is his job. 收集有关儿童健康的信息是他的工作。 It’s necessary to discuss the problem with an experienced teacher. 与一位有经验的老师讨论这个问题是有必要的。
2、常用不定式做主语的句型有： （1）It’s difficult (important, necessary) for sb. to do （2）It’s kind (good, friendl y, polite, careless, rude, cruel, clever, foolish, brave) of sb. to do. 3、常用动名词做主语的句型有： It’s no good (use, fun) doing. It’s (a) waste of time one’s doing.
不定式与动名词专题练习 1．I don't allow _____ in my drawing room. I don't allow my family _____ at all. A. smoking；to smoke B. to smoke；smoking C. to smoke；to smoke D. smoking；smoking 选A。allow要用动名词做宾语，用动词不定式作宾语补足语。 2．Your clothes need _____. A. washed B. to be washed C. to wash D. being washing 选B。need to be done相当于need doing, 表示被动语态。 3．This bike is not worthy _____. A. to be repaired B. of repairing C. to repair D. repairing 选A。be worthy to be done的意思是"某事值得被做"。 4．_____ provides us with essential nutrients, while _____ provides us with oxygen. A. To eat; breathing B. Ea ting; to breathe C. Eating; breathing D. Eaten; breathed 选C。while是并列连词，连接两个并列的动名词结构。 5．Rebecca was unhappy for _____ the first chance to go abroad. A. not having been given B. not having given C. not giving D. having been given 选A。not having been done是动名词的完成被动式的否定形式，表示动作发生在谓语动词之前，而且是被动的。 6．_____ is better to love than _____. A. That; to be loved B. That; be love C. It; be loved D. It; to be loved 选D。It在句中作形式主语；than连接两个并列的动词不定式。 7．I've got the loaf；now I'm looking for a bread knife _____. A. cutting it by B. cutting it with C. to cut it with D. to cut it by 选C。动词不定式作后置定语；with表示工具；by表示手段。 8．I'm glad _____ by him yesterday. A. not be seen B. to not have been seen C. not to have been seen D. not to have seen 选C。not to have been done是动词不定式的完成被动式的否定形式，表示动作发生在谓语动词之前。 9．-What do you think about English? -It's a difficult language _____. A. speaking B. to be spoken C. to speak D. spoken 选C。可以在不定式前加上for sb.作为逻辑主语，因此是主动的。 10．He would rather stay at home than _____ out with you. A. go B. to go C. going D. goes
动名词作主语和动词不定式做主语的区别？ 动词不定式与动名词的区别：）to+V放句首为动词不定式，用法与V+ing差不多，多用于 后面所说的事情还没有发生。例：To be a author is my dream. V+i ng 放句首是动名词，其 相当于名词，例：Doi ng lots of exercise is good for health. 一般来讲，to+ v.表主动，表 将来，表一次行动作。-ing表主动，表进行。动词不定式与动名词的一些用法：）不定 式与动名词都可以在句中作主语、宾语、表语和定语，但用法不尽相同。 1 ?作主语一般情 况下，不定式与动名词作主语可以互换，也常常可以用it充当形式主语，而把不定式和动名词放在句子的后半部分。但二者也有区别，不定式常常指某次具体的、将要发生的行为；而动名 词则表示一般的、抽象的行为。例如：To save money now is not easy. 现在攒钱不容易。 Savi ng mo ney is a good habit. 攒钱是个好习惯。 2 .作定语不定式多为后置定语，动名词 多为前置定语；不定式多表示将来的动作，动名词只能表示事物的属性、用途等。例如：He is look ing for a room to live in. 他正在找一间房子去住。Take these sleep ing pills and you\'ll sleep better.吃了这种安眠药，你会睡得更好。3 .作宾语：有些动词后只能跟不定式作宾语,不能跟动名词作宾语；有些动词后常跟动名词作宾语，不能跟不定式作宾语；有些动词后跟不定式和动名词作宾语皆可， 1、动名词做主语往往表示普通的、一般的行为，不定式做主语常表示某次具体的行为。例女口： Collect ing in formation about childre n ' s health is his jc收集有关儿童健康的信息是他的工作。It ' s necessry to discuss the problem with an experieneed teacher. 与一位有经验的老师讨论这个问题是有必要的。2、常用不定式做主语的句型有： （1） It ' s difficult （important，necessary） for sb. to do （2）It ' s kind （good，friendly，polite， careless，rude，cruel，clever，foolish，brave） of sb. to do. 3 、常用动名词做主语的句型 有: It ' s no good （use，fun） doing. It ' s （a） waste of time one 另：1）s动o名词作主语通常表示抽象动作；而不定式作主语表示具体动作。Smoking is prohibited（禁止）here .这里禁止抽烟。（抽象）It is not very good for you to smoke so much .你抽这么多烟对你身体很不好。（具体）（2）动名词作主语时，通常用以表示一件已知的事或经验。 不定式短语通常用来表示一件未完成的事或目的。Climb ing mou ntai ns is interesting .爬山很有趣。（经验）Driving a car during the rush hour is tiring .在高峰时刻开车令人厌烦。（经验）（3 ）不定式做主语，一般用it当形式主语，把作主语的不定式短语后置。It took me only five minu tes to finish the job. I .动名词和不定式做主语的相同点 1. 不定式短语和动名词做主语时，常常为了保持句子的平衡，用it来做形式主语，如： It is not easy to learn English well. It is no use asking him for help. 2. 如果主语用了不定式，表语和宾语也要用不定式；主语用了动名词，表语和宾语也要用动名词，这在英语中称为对称性，如：
动词不定式和动名词 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． (1)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)如果要表示不定式动作的执行者，就在It + be +形容词+to do sth该句型中的不定式之前加for sb或of sb。 ①在形容词hard, difficult, easy, necessary, important, impossible, good, helpful, useful, dangerous, safe等之后常用for sb，即构成句型：It + be + 形容词+for sb to do sth。e.g. I t’s not easy for us to learn a foreign language well. It’s dangerous for you to swim in the river. 该句型中的形容词修饰的是不定式，强调的是做某事怎么样。 ②在形容词nice, kind, clever, foolish(愚蠢的), polite(有礼貌的), careless, careful等之后，常用of sb，即构成句型：It + be + 形容词+of sb + to do sth e.g. It is very kind of you to help me. It was wrong of them to cut the trees. 该句型中的形容词主要修饰人，表示某人的性质或特征，强调的是这个人怎么样。 (3)it作形式主语时，其后的谓语也可以是实义动词。e.g. It took us five hours to get there. It made me happy to find my friends there. (4)动词不定式与疑问词how, what, when, where, which等构成不定式短语，也可作主语。e.g. How to use the computer is the question. Where to go has not been decided. 注意：主语，表语都为动词不定式时，不能用形式主语it代替不定式。e.g. To see is to believe. 眼见为实。 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。
初中不定式和动名词 一、动词不定式：构成：to + 动词原形 1. 下列动词只能接不定式作： want 想要, agree 同意, choose 选择, decide 决定, expect 期望, hope 希望, earn 学会, need 必要, offer 提供, prefer 宁愿, +to do promise保证, plan 计划refuse 拒绝, wish 希望, would like想要 2. 下列动词只能接动名词（即动词+ing） Enjoy; mind; practice; finish；suggest ;deny; admit ; keep; spend; feel like + doing sth. enjoy doing sth., 喜欢做某事mind doing sth. 介意做某事, practice doing sth. 练习做某事finish doing sth. 做完某事 feel like doing sth. 想要做某事keep doing sth. 坚持做某事 have fun doing sth. 尽情做某事suggest doing sth.建议做某事 deny doing sth. 否认做某事admit doing sth.承认做某事 be/get used to doing sth. 习惯做某事look forward to doing sth. 盼望做某事 spend…(in) doing sth. 花费时间做某事can’t help doing sth. 情不自禁做某事 be busy doing sth 忙于做某事be worth doing sth 值得做某事 prefer doing sth. to doing sth 与…相比更喜欢做某事pay attention to doing sth. 注意做某事3．有些动词后面既可接不定式，也可接动名词，意思相同。如： begin/start to do sth.= begin/start doing sth开始做某事, like/love to do sth= like / love doing sth. 喜欢做某事; hate to do sth. =hate doing sth.憎恨做某事 4. 有些动词后接不定式或名词时，意思不同。如： 1）remember doing sth. 记得作过某事（某事已做过） remember to so sth.记住去做某事（某事还没做） 2）forget doing sth. 忘了作过某事（某事已做过） forget to do sth. 忘了去做某事（某事还没做） 3）try to do sth.=do one’s best to do sth. 尽力去做某事 try doing sth. 尝试做某事 4）stop doing sth. 停止做某事（停止正在做的事） stop to do sth.停下来做某事（停止的事去做另外的事） 5）go on doing sth. 继续做某事（同一件事） go on to do sth. 接着去做某事（不同的事） 5.下列动词跟动词不定式充当宾语补足语：vt.+sb. to do sth. vt.+ sb.+not to do sth. Want/ask/ tell /order/ allow/ wish/beg/advise / call /invite +sb. to do sth. She told me to buy a ticket.她让我去买张票 My mother often tells me not to go out at night. 6.help 后的不定式可带to, 也可不带to The teachers helped the students (to) learn English well. 那些老师帮助学生学好英语。 He often helps his mother (to) tidy up the room.他经常帮助他妈妈整理房间。