动名词的用法及归纳
一、定义
动名词，就是动词后加ing 的形式，即doing sth. 它的作用相当于一个名词，所以叫做“动名词”。
二、动名词的特征及作用
动名词是一种兼有动词和名词特征的非限定动词。它可以支配宾语，也能被副词修饰。动名词有时态
和语态的变化。
动名词属于非谓语动词中的一种，所以它不可以做谓语。
动名词具有名词的性质，因此在句中可以做主语、表语、宾语、定语、状语等。
【例题】指出下列句子中动名词/现在分词或动名词/现在分词短语做句子的什么成份：
①Climbing mountains is really fun.
②It is no use/no good crying over spilt milk.
③Mark often attempts to escape being fined whenever he breaks traffic regulations.
④We are busy preparing for the coming sports meet.
⑤a walking stick
⑥a washing machine
⑦Be careful while crossing the street.
⑧Seeing is believing.
⑨My work is cleaning the house.
⑩Be careful while crossing the street.
三、动名词和现在分词的区别：
动名词：动词的-ing形式，相当于名词在句子中的用法；
现在分词：具有动词的特征，可以表示一个正在进行、主动的动作。
【例题】判断以下v-ing形式是动名词用法还是现在分词用法：
①I see Mary doing her homework now.
②Seeing is believing.
③They are singing.
④Walking in the street, I came across an old friend of mine.
⑤I advice waiting till tomorrow.
⑥I prefer going shopping this weekenk.
四、动名词和动词不定式作主语的区别：
动词不定式和动名词都可以用作主语。在意义上相近。但动名词多用来表示泛指或抽象动作，
不定式多用来表示特指或具体动作。
比较以下句子：
Saving money is a good habit.
To save money is not easy for me.
五、动名词的时态和语态
动名词的时态和语态如下图所示：
主动形式被动形式一般式v原形+ing：doing being+v过去分词：being done
完成式having+v过去分词：having done having been+v过去分词：having been done
高中英语语法：It的完整用法精讲 it可用作人称代词、指示代词、先行词及引导词等。 1. 人称代词it，是第三人称单数中性，代表前文已提到过的一件事物。如： 1）That vase is valuable. It's more than 200 years old. 那个花瓶很珍贵，它有200多年的历史。 2）I love swimming. It keeps me fit. 我喜欢游泳，它能使我保持健康。 当说话者不清楚或无必要知道说话对象的性别时，也可用it来表示。如： 3）It's a lovely baby. Is it a boy or a girl? 宝宝真可爱，是男孩还是女孩？ it可用来指代团体。如： 4）The committee has met and it has rejected the proposal. 委员会已开过会，拒绝了这项建议。 it用以代替指示代词this, that.如： 5）--- What's this? --- It's a pen. —这是什么？—是一支钢笔。 6）--- Whose book is that? --- It's Mike's. —那是谁的书？—是迈克的。 2. 指示代词it，常用以指人。如： 7）Go and see who it is. 去看看是谁。 8）--- Who is making such a noise? —是谁发出这样的吵闹声？ --- It must be the children. —一定是孩子们。 3.虚义it无指代性，常用作没有具体意义的主语，出现于表示天气、气候、温度、时间、地点、距离等意义的句子中。如： 9）It is half past three now. 现在是三点半钟。 10）It is six miles to the nearest hospital from here. 这里离最近的医院也有六英里。 11）It was very cold; it snowed and grew dark. 天气很冷；天下着雪，渐渐地变黑了。 it也常用来表示一般的笼统的情况。如： 12）It's awful—I've got so much work I don't know where to start. 糟透了——我有这么多工作要做我不知从何开始。 13）How is it going with you? 你近况如何？ 14）Take it easy. 不要紧张。 it也常用于下列结构： 15）It looks as if the college is very small. 看起来这个学院很小。 16）It seems as though our plan will be perfect. 似乎我们的计划很完善。 17）It's my turn. 该轮到我了。 it也常用于某些习惯用语中作宾语，各该习惯用语有具体意义，但it并无具体意义。如：cab it 乘车catch it 受责，受罚come it 尽自己分内come it strong 做得过分walk it 步行make it 办成take it out of somebody 拿某人出气 4. 先行词it. it充当形式主语或形式宾语，本身无意义，只起一种先行引导的作用，先行词不重读。后面的真正主语或真正宾语通常是不定式结构、-ing分词结构或名词性从句。 （1）用作形式主语
你听过英文语法有动词(verb)、名词(noun)；但你听过有动名词(gerund)吗？ 1. The girl is singing a song. 2. The girl singing now is my sister. 3. Singing is one of her hobbies(爱好). 三个句子中都有singing。第一个句子的singing是常见的现在进行式(Present Continuous)，是说眼下正在做什么；第二个句子的singing是现在分词(Present Participle)，它把sing这个动词转为形容词，但仍有动词的成份（哈哈，这么一说，要把你搞晕了吧:-) 。关于分词，以后有空再谈OK？）。好戏在后头，你看看第三个句子的singing到底是什么东东呀？原来就是我们的主角动名词(Gerund)了！憧矗瑂ing原本是个动词，可是现在它加上ing后，看来竟像是一个名词了。 一、名词性的动名词(Nominal Gerund) Nominal Gerund 可以加上定冠词(Definite article，如the)或不定冠词(Indefinite article，如a, an)，其他可加在动名词前的还有如：my, this, some, any, all, no 等等。举例如下： 1. The mellow(愉快地) singing of the birds announces the coming of spring. (singing前加定冠词the及形容词mellow；coming 前加the) 2. We knew the robber was near when we heard a faint rustling(沙沙声) in the bushes. (rustling 前加不定冠词a及形容词faint) 从上面的例子可看出如何将一个动词转成名词；但它和真正的名词还是有区别的，那就是没有单数或复数之分。不过，有一些动名词是可以变成真正名词的喔，如：saying, writing, opening, painting, cutting, heading, feeling, being,saving, surrounding, crossing, misunderstanding 等等。它们都可以有复数的喔，方法就是在它们的后面加个s，如：paintings。 二、动词性的动名词(Verbal Gerund) 看看下面的句子： Carelessly writing essays annoys the teacher. 上面的句子里的writing是动名词，但前面有副词carelessly（粗心地），后面又有受词(Object) essays。因此writing就有动词的特征。 注意：Verbal Gerund 这类动名词的前面可不能加上任何冠词(the, a, an ...)喔。 动名词的功能与用法 一、在句子中用作主语(Subject)或主语的补语(Subject Complement): 1.1 作主语 1. Listening to music gives me pleasure. (主语Listening ） 2. Running is good exercise. （主语running) 3. Walking to school is a good idea. (主语walking) 1.2 作主语的补语 1. My cat's favorite activity is sleeping. (补语sleeping) 2. Seeing is believing. (主语seeing, 补语believing) 1.3 主语置于句尾 1.3.1 用It + be + ... +v-ing 句型 1. It is fun speaking English. 2. It is of great importance fighting against pollution(污染).
高中英语语法详解：动名词 概念 动名词由动词原形+ING构成,是一种非谓语动词形式 相关知识点精讲： 1.作主语。例如： Fighting broke out between the South and the North. 南方与北方开战了。 2.作宾语 a. 有些动词能够用动名词作宾语。例如： admit 承认 appreciate 感激 avoid 避免 complete完成 consider认为 delay 耽误 deny 否认 detest 讨厌 endure 忍受 enjoy 喜欢 escape 逃脱 fancy 想象 finish 完成
imagine 想象 mind 介意 miss 想念 postpone推迟 practice 训练 recall 回忆 resent 讨厌 resume 继续 resist 抵抗 risk 冒险 suggest 建议 face 面对 include 包括 stand 忍受 understand 理解 forgive 宽恕 keep 继续 例如：Would you mind turning down your radio a little, please? 你把收音机音量调小一点，好吗 The squirrel was lucky that it just missed being caught. 这松鼠幸运得很，刚逃避了被逮住的厄运。 b. 有些结构后面能够用动名词作宾语或其他成分。例如：
admit to prefer…to be used to lead to devote oneself to object to stick to no good no use be fond of look forward to be proud of be busy can't help be tired of be capable of be afraid of think of burst out keep on insist on count on
高中英语连词用法归纳 一、概说 连词是一种虚词，用于连接单词、短语、从句或句子，在句子中不单独用作句子成分。连词按其性质可分为并列连词和从属连词。并列连词用于连接并列的单词、短语、从句或句子，如and, but, or, for等；从属连词主要引出名词性从句(主语从句、宾语从句、表语从句等)和状语从句(时间状语从句、条件状语从句、目的状语从句等)，引出名词性从句的连词如that, whether等，引出状语从句的连词如when, because, since, if 等。 二、并列连词的用法 ◆ 1. 表示转折关系的并列连词。这类连词主要有but, yet 等。如： Someone borrowed my pen, but I don?t remember who. 有人借了我的钢笔，但我不记得是谁了。 He said he was our friend, yet he wouldn?t help us. 他说他是我们的朋友，但却不肯帮助我们。 ◆ 2. 表示因果关系的并列连词。这类连词主要有for, so 等。如： The child had a bad cough, so his mother took him to the doctor. 这孩子咳得很利害，所以他妈妈带他去看医生。 You are supposed to get rid of carelessness, for it often leads to serious errors. 你们一定要克服 粗枝大叶，因为粗枝大叶常常引起严重的错误。 注意：for表示结果通常不能放句首，也不能单独使用。 ◆ 3. 表示并列关系的并列连词。这类连词主要有and , or , either…or , neither…nor , not only…but(also) , both…and , as well as 等。如： He didn?t go and she didn?t go either. 他没去，她也没去。 The weather is mild today; it is neither hot nor cold. 今天天气很温暖，不冷也不热。 Both New York and London have traffic problems. 纽约和伦敦都存在交通问题。 It is important for you as well as for me. 这对你和对我都很重要。 People who are either under age or over age may not join the army. 年龄不到或者超龄的人都不得参军。 三、从属连词的用法 ◆1. 引导时间状语从句的从属连词 (1) 表示“当…时候”或“每当”的时间连词。主要的when, while, as, whenever。如： Don?t talk while you?re eating. 吃饭时不要说话。 Vegetables are best when they are fresh. 蔬菜新鲜时最好吃。 He came just as I was leaving. 我正要走时他来了。 (2) 表示“在…之前(或之后)”的时间连词。主要的有before, after。如： Try to finish your work before you leave. 离开前设法把工作做完。 After we have finished tea, we will sit on the grass. 喝完茶之后我们将坐在草地上。 (3) 表示“自从”或“直到”的时间连词。主要的有since, until, till。如： She?s been playing tennis since she was eight. 她从八岁起就打网球了。 Hold on until I fetch help. 坚持一下，等我找人来帮忙。 Never trouble trouble till trouble troubles you. (谚)不要无事惹事。 (4) 表示“一…就”的时间连词。主要的有as soon as, the moment, the minute, the second, the i nstant, immediately, directly, instantly, once, no sooner…than, hardly…when等。如： I?ll let you know as soon as I hear from her. 我一接她的信就通知你。 The moment I have finished I?ll give you a call. 我一干完就给你打电话。 I came immediately I heard the news. 我一听到这个消息，马上就来了。 Once you begin you must continue. 你一旦开始, 便不可停下来。 (5) 表示“上次”、“下次”、“每次”等的时间连词。主要的有every time(每次)，each time(每次)，(the) next time(下次)，any time(随时)，(the) last time(上次)，the first time(第一次)。如： I?ll tell him about it (the) next time I see him. 我下一次见到他时，我就把这个情况告诉他。We lose a few skin cells every time we wash our hands. 每当我们洗手的时候，我们都要损失一
巩固练习 Ⅰ. 把下面句子译成英语，注意it的用法。 1. 过了很久他才回来。 ________________________________________________________________________ 2. 我们两个月后才会再见面。 ________________________________________________________________________ 3. 我离开这所学校已经20年了 ________________________________________________________________________ 4. 直到她摘下墨镜我才认出她是个著名影星。 ________________________________________________________________________ 5. 是约600年前第一块带有表盘(face)和一个时针（hour hand）的钟表被制造出来的。________________________________________________________________________ 6. 昨天是他们打扫的教室。 ________________________________________________________________________ 7. 我是在大街上遇见她的父亲的。 ________________________________________________________________________ 8. 我们弄清楚了我们要在何时何地开会。 ________________________________________________________________________ 9. 据说所有的票都卖完了。 ________________________________________________________________________ 10. 我们真的该采取行动了。 ________________________________________________________________________ Ⅱ. 从方框中选出能够填入空白处的合适的连接词。 since, before, after, that, where, which 1. The weather turned out to be very good, _______ was more than we could expect. 2. It was not until ten o'clock ______ we got home last night． 3. Look at the building. It was the theatre _______ Lincoln was murdered. 4. Could it be in the restaurant in______ you had dinner with me yesterday_______ you left behind your keys and wallet? 5. It's years ______I painted this beautiful picture. 6. It will be years ______ I paint this beautiful picture. 7. It was years ______ I painted this beautiful picture. 8. It's for years ______ I have painted this beautiful picture. 9. It worried the mother a lot _______ her son drove so fast. 10. I think it important ______ you should attend the conference. Ⅲ. 单项选择。 1. I have always been honest and straightforward, and it doesn't matter ____ I am talking to. A．who is it B．who it is C．it is who D．it is whom 2. It was the ability to do the job _______ matters not where you e from or what you are.
高中英语语法之动名词 一、含义 动名词兼有动词和名词特征的非谓语动词形式。基本形式为v-ing, 动名词具有名词的性质，因此在句中可以做主语、表语、宾语、定语等。 动名词有时态和语态的变化。 动名词的时态和语态的基本形式：（以write为例） 注意：动名词的否定形式是：not writing 二、动名词的基本用法 １．用作主语---常表抽象，或者泛指习惯性的动作。 Smoking is bad for your health. Playing with fire is dangerous. Swimming is her favorite sport. 游泳是她最喜欢的体育运动。 Learning is important to modern life. 学习对现代生活很重要。 注意： ①不定式也可以做主语。不定式与动名词作主语的区别： 不定式作主语时经常表示具体的、 ．．．动作，而动名词 ．．．．一次性 作主语时经常表示抽象动作或习惯性动作。
Getting up early is a good habit. To get up early this morning made me sleepy. ②动名词作主语，有时用it作形式主语，把动名词置于句末。 It is no use/ good doing...(做。。。没有用); It is fun doing... (做。。。很有趣); It is a waste of time doing... (做。。。是浪费时间) 等句型中。 例如：It’s no use crying over spilt milk.(覆水难收） It is fun playing with children. 和孩子们一起玩真好。 It is a waste of time persuading such a person to join us. 说服这样一个人加入我们当中来是浪费时间。 2. 作宾语 ①作某些及物动词的宾语 常见的动词有：advise，avoid，delay，escape，excuse，enjoy，consider，finish，deny，fancy，keep，mind（在乎）postpone，pardon，practise，suggest，imagine等。 need，want，require后接动名词，表示被动意义。 如：Would you mind opening the door？请你把门打开好吗？ Fancy meeting you here. 真想不到在这里遇见你。 ②作介词的宾语 He left without saying good-bye to us. 他没有和我们道别就离开了。 On arriving at the airport，I saw my mother standing in the
The Gerund Seeing (see) is believing. Having solved (solve) this difficult question made her very happy. Being invited (invite) to the party is a great honor. Having been defeated (defeat) by such a weak team made the players very upset. 1. 定义： 动名词是英语动词的一种非谓语形式。动名词的构成：动词加上ing 构成。顾名思义，动名词有双重功能。它既有名词的特点---可作句子的主语，动词和介词的宾语；也有动词的特点---可以有自己的宾语和状语。 First, exchange a “Hello” or “Hi” with the foreigner, but at the same time, pay close attention and see if he feels like chatting. That’s the cue for you to stop moving on. Making small talk can be one of life’s pleasures. 2. 动名词具有名词的性质，因此在句中可以作主语、表语、宾语、定语。 1) 作主语 ①直接位于句首做主语。 . _____D_____ clean is a safeguard against disease. A. To be keeping B. Kept C. Keep D. Keeping 读书是一种艺术。 Reading is an art. 爬山是真有趣。 Climbing mountains is really fun . ②动名词作主语，除了放在句首，有时先用it作形式主语，把动名词置于 句末。这种用法在习惯句型中常用。如： It is no use/no good crying over spilt milk. 洒掉的牛奶哭也没用。 It is a waste of time persuading such a person to join us. 劝说这样的人加入真是浪费时间。 It is fun playing with children. 和孩子们一起玩真好。 注：动名词作主语与动词不定式作主语的比较 动词不定式和动名词都可以用作主语。在意义上相近。但动名词多用来表示泛指或抽象动作，不定式多用来表示特指或具体动作。比较： Smoking is not good for health. It is not good for you to smoke so much.
高中英语连词知识点整理 一.概念 连词是用来连接词,短语,从句或句子的词.连词不作成分. 二.重点连词 .表示并列关系的连词有：and,both…and…,notonly…butalso…和neither…nor…等 )and：和，并且（连接对等关系的字和字，句子和句子） 例如：Ienjoybasketball,footballandtabletennis. Theweatherbecomescolderandcolder. 2)both…and…既…也…,都… 注：both…and…构成的词组作主语时,谓语动词用复数。 例如：BothjimandkatearefromEngland. both…and…否定句表示部分否定。 例如：youcan’tspeakbothGermanandEnglish. Bothmyfatherandmymotheraren’tdoctors. 3)neither…nor…:既不…也不…（就近原则） 例如：NeitherInorhehasseentheplaybefore. 4)notonly…butalso…:不但…而且…（就近原则） 例如：Notonlythemotherbutalsothechildrenareill.
2.表示转折关系的连词有：but,however,yet,still，while等。 例如：marywasanicegirl,butshehadoneshortcoming. Hewasverytired,stillhekeptonwalking. 3.表示选择关系的并列连词有：or,either…or…,whether…or…等。 )or：或、否则 例如：IsyourfriendEnglishorAmerican? Hedoesn’tlikedumplingsornoodles. 祁使句后连接or，表“如果…,否则…”,有转折的意思，此时or=ifyoudon’t…,you’ll… 例如：Hurryup,oryou’llbelate. =Ifyoudon’thurryup,you’llbelate. 2)either…or…:或者…或者…;不是…就是… 例如：EitheryouorIamright. DoeseithersheortheylikeEnglish? 注：由either…or…引导的否定句是完全否定。 例如：Sheisn’teitherastudentorateacher. 3)whether…or…不管…还是… 例如：Sheisalwayscheerful,whetherathomeoratschool.
语法复习二十一：连词 连词分为并列连词和从属连词两大类。并列连词是连接主语与主语，谓语与谓语，句子与句子，分词与分词的词，它要求前后两部分有相同的形式和语法作用；而从属连词一般连接主句与从句，从句形式有名词性从句，定语从句和状语从句等。 （一）并列连词： 并列连词可用来连接词与词，词组与词组，分句与分句。常用的并列连词有：and（和），as well as（既…又），both … and（不但…而且），not only … but also（不但…而且），not … but（不是…而是），neithe r … nor（既不…也不），either … or（不是…就是），or（或者），but （但是），yet（然而），for（因为），so（所以），while（而），when（这时）等。如：Both my brother and my sister are teachers./ His room is bright but mine is gloomy（暗沉沉的）./ He can not only repair radios but also fix them./ It is a glorious（光荣的）yet difficult task./ Strike while iron is hot. （二）从属连词 从属连词是指在复合句中引导从句的连结词。常见的从属连词有： 引导时间状语从句的：after, before, when, as, while, since, until, till, as soon as 引导原因状语从句的：because, since, as 引导让步状语从句的：although, though, no matter（无论）, even if (though) 引导条件状语从句的：if, unless, once, so (as) long as 引导结果状语从句的：so … that …, such … that … 引导目的状语从句的：so that …, in order that … 引导比较状语从句的：as … as …, not so (as) … as …, … than … 引导方式状语从句的：as if … 引导主语，宾语或表语从句的连词主要有：that, whether, if三个。其中that 和whether 间或还可以引起同位从句和状语从句。 （三）某些用法比较特殊的从属连词用法区别 1、当while, when, as引导时间状语从句时的区别：①while引导的状语从句中动词必须是持续性。谓语动词多为进行时，或状态动词的一般时。while 的这些用法可用when代替，等于“at the time that”, “during the time that”。例如：Please keep quiet while (when) others are studying；② when除可指一段时间外，还可用来指一点时间，等于“at the time”，也就是说when引出的时间状语从句中的谓语动词可以是终止性的，也可以延续性的。因此主句和从句的谓语可以是一般时，进行时，或完成时。例如：When I went into the lab, the teacher was doing an experiment.（when不能换成while）He often makes mistakes when he is speaking English.（when可换成while）③as常可与when，while通用，但强调“一边、一边”。例如：
高考英语语法知识之It 的用法总结 1．It is + 被强调部分+ that ... 该句型是强调句型。将被强调的部分放在前面，其它部分置于that之后。被强调部分可以是主语，宾语，状语。强调的主语如果是人，that可以由who换用。 如果把这种句型结构划掉后，应该是一个完整无缺的句子。这也是判断强调句型与其它从句的方法。 It was they that (who) cleaned the classroom yesterday. It was in the street that I met her father. 2．It was not until + 被强调部分+ that ... 该句型也是强调句型。主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是not ... until ... 的强调形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = Not until she took off her dark glasses did I realize she was a famous film star. = I didn’t realize she was a famous film star until she took off her dark glasses. 3．It is clear ( obvious, true, possible,certain....) that ..... 该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显然，真的，肯定．．．）＂是主语从句最常见的一种结构。 It is very clear that he’s round and tall like a tree.= That he’s round and tall like a tree is very clear. 4. It is important ( necessary, right, strange, natural...) that ... 由于主句中的形容词不同，that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去。 It is important that we (should) learn English well. It is necessary that he (should) remember these words. 5. It is said (reported, learned....) that ... 该句型中的it 仍是形式主语，真正主语是that 引导的主语从句。该结构常译为＂据说（据报道，据悉．．．）＂。It is said that he has come to Beijing. 6. It is suggested ( ordered ... ) that ... 主句中的过去分词是表示请求，建议，命令等词时，that后的从句要用虚拟语气（should + 动词原形），should 可以省。常译为＂据建议；有命令．． It is suggested that the meeting ( should ) be put off. It was ordered that we ( should ) arrive there in two hours. 7. It is a pity ( a shame ... ) that ... 该句型中，that后的从句一般用虚拟语气（should + 动词原形），should可省去．表示出乎意料，常译为＂竟然＂。没有这种意义时，则不用虚拟语气。 It is a pity that such a thing ( should ) happen in your class. It is a pity that he is ill. 8. It is time ( about time ,high time ) that ... 该句型中that 后的从句应该用虚拟语气，值得注意的是①常用过去时态表示虚拟．②有时也用should + 动词原形，should 不能省。常译为＂是（正是）．．．的时侯．．．＂。 It is time that children should go to bed. = It is time that children went to bed. 9. It is the first ( second ... ) time that ... 该句型中的that 从句不用虚拟语气，而用完成时态。至于用什么完成时态，由主句的谓语动词的时态决定。如果是一般现在时，后面从句用现在完成时态；如果是一般过去时，后面从句则用过去完成时态。该结构中that 可以省去；it有时用this / that 替换．常译为＂这是某人第几次做某事了＂。 It is the first time I have been here. = This is the first time I have been here. 10 It is the +形容词最高级+ 名词+ that + ….. 该句型中的that 从句不用虚拟语气，而用完成时态。至于用什么完成时态，由主句的谓语动词的时态决定。如果是一般现在时，后面从句用现在完成时态；如果是一般过去时，后面从句则用过去完成时态。该结构中that 可以省去；it有时用this / that 替换．常译为＂这是某人做过的最…的事情＂。 This is the best film that I have ever seen . That was the worst song that he had heard . 11. It is .... since ...
高中英语动词不定式用法大全(名师总结必考语法知识点，值得下载) 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 pla nt 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。 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。例： I want to tell you a story. 我想给你讲个故事。 They begin to work at eight every morning. 他们每天早晨8点开始工作。 Don’t forget to lock the door.别忘了锁门。 Would you like to go and have a picnic with us tomorrow?明天和我们一
高中英语现在分词的用法 1）- ing分词（短语）作主语： 1. 动词-ing 形式作主语表示抽象的或泛指的动作, 谓语动词用单数。如： 1. Talking to him is talking to a wall. 对他说话等于对牛弹琴。 2. Smoking may cause cancer. 吸烟会致癌。 3. Walking is my only exercise. 散步是我唯一的运动。 4. Talking mends no holes. （谚）空谈无济于事。 5. Saying is easier than doing. 说比做容易。 1. 为了保持句子平衡，通常用作形式主语，而把真实主语放在句末。如：It is no use crying over spilt milk. 作无益的后悔是没有用的。 It's a waste of time arguing about it. 辩论这事是浪费时间。 常见的作表语的名词或短语有：no use, no good, fun, hard work, a hard / difficult job, a wonder, a waste of time 等。如： It is worthwhile discussing with her. It 's no good waiting here. Let 's go home. It was a waste of time reading that book. 2. 动词-ing形式的否定形式是在其前面加not。如： Your schoolmate 's not coming home made her parents worried. 2）-ing 分词（短语）作宾语： 1. I suggest ending the meeting. 我建议结束会议。 2. He admitted taking the money. 他承认钱是他拿的 3. I couldn ' t help laughing.
动词的-ing形式按功能可分为动名词和现在分词。动词的-ing形式何时为动名词，何时为现在分词。首先，我们要从概念上区分。动词的-ing形式在起名词作用时，称为动名词；用作形容词或副词时，称为现在分词。其次，我们要从用法方面区分动词的-ing形式是动名词还是现在分词。 一、动词的-ing形式用作主语时为动名词，现在分词不可以用作主语。 1．动名词用作主语. Reading French is easier than speaking it. 阅读法文比讲法语容易。 Talking to him is talking to a wall. 和他说话等于对牛弹琴。 2．有时it作形式主语，把动名词主语放在句子后面 It’s nice seeing you again. 再次见到你太好了。 It was tiring driving from morning till night. 从早到晚开车很累人。 3. “There is + no”后可以用动名词作主语 There was no knowing what he could do. 他能做什么很难说。There was no arguing with her. 没法和她争论。 二、动词的-ing形式用作宾语时为动名词，现在分词不可以用作宾语。 1．有许多动词可接动名词作宾语 I suggested bringing the meeting to an end. 我建议结束会议。 So you prefer living abroad? 这样说你更愿意住在国外？ 2．有许多带介词的动词固定搭配接动名词作宾语 He has given up playing football. 他现在不踢足球了。Prices keep on increasing. 价格不断上涨。 三、当动词的-ing形式用作状语时为现在分词，动名词不可以用作状语。 现在分词及其短语可以用作状语，表示时间、原因、结果、条件、让步、方式或伴随情况等。其动作可能发生在谓语之前或之后，也可能与谓语动词的动作同时发生。 Climbing to the top of the tower, we saw a magnificent view. 我们爬到塔顶后，看到了一片壮丽的景象。（表时间） Living in the country, we had few social engagements. 我们住在乡下，交际的机会很少。（表原因） Having money, he will buy a bigger car.（表条件） Knowing the secret, she would not tell me about it..（表让步） The child fell, striking his head against the door and cutting it. 那孩子跌倒了，头碰在门上碰破了.（表结果） He stood leaning against the wall. 他靠墙站着.（表方式或伴随情况） 四、动名词与现在分词都可以用作表语，当动词的-ing的作用相当于名词时为动名词。当动词的-ing的作用相当于形容词时，动词的-ing为现在分词。 1．动名词用作表语 Her hobby is painting. 她的爱好是绘画。Her job was tending the sheep. 她的工作是放羊。 2．现在分词用作表语