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,怎样成为一个不错的英语学习者?,每一种语言的学习都是围绕其三大要素语音、语法和词汇而展开的。1.语音学习。国际音标是根本,更高层次的是语调和语流的把握。充分的语言环境是至关重要的。语音在英语语言能力的直接表现是交际能力,即听与说。多练吧。BBC,VOA,美剧(老友记是不错的素材),背诵新概念英语(1-4册)。2.语法学习。语法较之语音,是相对容易把握得住的,学习者可以显性地学习,系统性指导讲解可以使学习效率事半功倍。这也是中学课堂上老师一般花大心力的部分。3.词汇学习。一个词,两个字,积累。在阅读中积累词汇是最值得推荐的。也有一些很好的记忆方法,因人而异,多归纳总结。(多本不同的词汇书结合起来记,有交融点的时候记忆就形成了,感觉这个法子对我很有效) 我能提供最多帮助的,也就是第二模块,语法学习,语法包括两大部分,词法和句法。鉴别这两者,先试分析以下句子。1.Never trouble trouble until trouble troubles you. 2. I know. You know I know. I know you know I know. You know I know you know I know. 3. That that that student wrote on the blackboard was wrong. 分析:1.四个”trouble”存在于一个句子,使其存在合理化的根本原因是词法,这一个词存在有两种词性名词性和动词性。 2.使第二个句子群的存在合理化的根本原因是句法,宾语从句。 3.词法和句法共同支持着第三个句子的存在。(“that”作为一般指示代词和定语从句关系代词的身份)。,总的说来,整个英语语法知识很有限。具体说来,词法是关于各种词类的使用,主要有动词、名词、代词、冠词和数词、形容词和副词、介词。关于这些词类的所涉及的知识点,可以系统地回忆一下,它们各自包含哪些,有哪些部分自己不甚熟悉,然后有针对性地进行学习、巩固和复习。 而语法主要包括从句(名词性从句-主语从句、宾语从句、同位语从句,定语从句和状语从句),动词时态、语态和非谓语动词,虚拟语气、一致关系、特殊句式(倒装句和强调句),纵向来看,初中英语主要是学词法,高中是句法,其中动词贯穿了初中和高中的语法学习,是英语句子的动脉。一般说来,完成了中学阶段的英语学习,学习者就已经掌握了整个英语框架,也就完全具备了独立学习英语的能力,后面的学习是在英语这棵大树树干上添加新叶,让她看起来更加丰满更加活力。(我有个高中伙伴,高中毕业没有继续深造,有着中学阶段建构的英语大框架支撑,靠着自学,学习过程也不算辛苦或是悲壮,现在英语水平比一般大学英语专业的学生高出很多。而且现在英语学得很棒的人中有很大一部分并非英语专业出身),动 词,定义,表示动作或状态的词,是构成句子的核心部分。有时态、语态、语气和非谓语动词的变化,也有人称和数的变化。,动词种类及其作用,1.系动词 系动词后常加一定的成份构成系表结构,说明主语的状态、性质、特征、身份和结果。 常见的系动词:be动词; 感官动词(feel, look, hear, sound, smell, taste); 保持(keep, stay, remain, sustain); 改变(become, turn, go, grow) 2.实意动词 分为及物动词和不及物动词,前者要求接宾语,否则意思不完整。不及物动词自身意思完整,不需要接宾语。 3. 助动词 没有独立意义,不能单独作为谓语,应与谓语动词连用,表时态、语态、语气或构成否定句、疑问句 4.情态动词 有一定的意义,没有人称和数的变化,必须和实意动词连用才能构成谓语。 注:助动词和情态动词后接动词原形,一定是 (o)/,普通动词的变化和形式,英语中有五种动词变化形式,即动词原形、第三人称单数形式、过去式、过去分词和现在分词,这五种形式构成动词的各种时态、语态和语气。,1.一般现在时的第三人称单数变化形式,(1)通常在末尾加-s works, plays, thinks (2)词尾以s, sh,ch,x或部分o结尾的词加-es teaches, goes, fixes (3)以“辅音字母+y”结尾的词,变y为i,再加-es tries, studies, carries,2.现在分词的词尾变化形式,(1)一般情况在末尾加-ing。going, doing, playing (2)以不发音字母e结尾的词,去e加-ing leaving, living, moving 但以-ee结尾的动词,直接加-ing。agreeing, seeing (3)以重读闭音节结尾的动词,末尾又只有一个辅音字母,则将末尾的辅音字母双写,再加-ing planning, beginning, begging,3.过去式和过去动词的词尾变化形式,(1)一般情况在词尾加-ed wanted, worked, stayed (2)以字母e结尾的动词词尾-d, living, facing, arriving (3)以“辅音字母+y”结尾的动词,变y为i,再加-ed tried, studied, carried (4)以重读闭音节结尾的动词,末尾又只有一个辅音字母,则将末尾的辅音字母双写,再加-ed planned, permitted, begged (5)特殊变化,动词涉及的知识点主要有三大部分,时态、语态和非谓语动词。,动词的时态,过去 现在 将来,1.一般现在时,一般现在时表示经常发生、习惯性动作、客观真理、科学事实、格言,目前的特征、状态、能力等; 主句是一般将来时,时间、条件状语从句中用一般现在时表示将来; Ill go there after I finish my work. If it rains tomorrow, I wont go there. Eg.Months ago we sailed ten thousand miles across the open sea, which_ the Pacific, and we met no storm. was called B. is called C. had been called D. has been called 虽然航海发生在过去,但是,海洋的名称不会因此而变化,所以要用一般现在时。,2.现在进行时,表示正在进行的动作; 表示按计划安排即将发生的动作。 She is leaving for Beijing.她要去北京。 My father is coming to see me this Saturday.这个星期六我爸爸要来看我。 代替一般现在时,描绘更加生动。 The Changjiang River is flowing into the east.江水滚滚向东流。 与always, forever, constantly, continually连用,表示赞赏或厌恶等感情色彩,但并非强调动作正在进行; She is always forgetting something.她老是忘记某些事情。,3.现在完成时,表示过去发生的动作对现在产生的影响或结果,或说话时已完成的动作; I have finished the report. 表示从过去开始,待续到现在的动作或状态,往往和“for.”, “since.”表述的一段时间状语连用;He has learned English for six years. 表示“曾经到过某地(人已回来)”用“have/has been to”; 表示“到某地去了(还未回来)”用“have/has gone to”。 Where is Li Hua? He has gone to the reading-room. She knows a lot about Shanghai.She has been there.,在时间状语从句,条件状语从句或让步状语从句中表达将来某时已经完成的动作。 When you have learned English, you will find it a bridge to so much knowledge. 注意:这里的现在完成时强调从句动作在主句动作之前完成, 如果两个动作同时或几乎同时发生, 则不必用完成时试比较: Ill let you know as soon as I hear from her. She will call you when she gets home.,短暂动词(即瞬间动词),join,lose,buy,borrow,leave,go,come,arrive,die,marry, finish,complete,begin,start,break out等,在完成时态中,其肯定式不能和表示一段时间的状语连用。 “他参军已经三年了”不能说:He has joined the army three years.可采用: “ago法”:He joined the army three years ago. “延续法”:He has been in the army for three years. “since法”:It is/has been three years since he joined the army.,4.现在完成进行时,用来表示从过去某一时刻开始一直持续到现在(或今后还要继续一去)的动作; He has been doing the maths problems since 8:00. 凡是不能用于现在进行时的动词均不能用于现成完成进行时。如: 感觉类:look, smell, feel, sound, taste, see, hear 情感类:like, love, prefer, admire, hate, fear 心态类:wish, hope, expect, want, need, believe, think, understand, agree, know 所有类:have, contain, own, hold, belong to等。,5.一般过去时,表达特定的过去时间内发生的动作或存在的状况,或过去某一时间内经常发生或反复发生的动作或为; He often sang when he was a boy. He went to the cinema last. 用于I didnt know或I forgot,表示事先不知道或不记得,但现在已知道或记得的事情。 I didnt know you were here.(现在已经知道) Sorry, I forgot to bring my book.(“忘记带书”已成为过去的事了),6.过去进行时,表示过去某一时刻或某一段时间内正在进行的动作(这一过去时间须用时间状语表示); He was preparing his lecture all day yesterday. 表示动作在另一过去动作发生时进行; They were still working when I left. 用在两个过去进行时动作同时发生; I was writing while he was watching TV. 过去计划、安排好的将来动作(只限于come, go, leave, arrive, start, move, sail, fly, travel, stay等); He said she was arriving the next day.,与always, forever, constantly, continually连用,表示赞赏或厌恶等感情色彩。 (参看现在进行时的用法) Comrade Lei Feng was always thinking of others never thinking of himself. 过去进行时可用来描绘故事发行的背景。 The wind was blowing and it was raining hard.,7.过去完成时,表示在过去某一时间以前已经完成的动作。 He had shut the door before the dog came up. Everything had been all right up till this morning. 表示动作或状态从过去某个时刻开始一直延续到另一个过去时刻才完成,甚至还要继续下去。 At the age of ten, he had learned 500 English words. 过去未曾实现的意图、打算或希望(只限于think, want, plan, mean, intend, hope, expect, suppose,wish, want等动词)。 I had wanted to pay a visit to you yesterday, but the rain prevented me. 我本来想昨天拜访你的,但是下雨(让我不能来)。,注意: 过去完成时必须以过去某一时刻为基点,即“过去的过去”。因此只有在和过去某时或某动作相比较时才用到它; before, after本身表示时间的“前”“后”明显,因此可用一般过去时代替过去完成时。 He (had) left before I arrived.,8.一般将来时,一般将来时有下列一些构成形式需要记住: will/shall do (侧重将来行为,不突出计划安排去做某事) be going to do (主观上打算或客观上可能发生) be doing (按计划将要发生,常和表示最近的将来时间连用) be about to do (按计划即将发生) 有时,这些差别亦可忽视。O(_)O 一般将来时的用法: 现在看来以后要发生的动作或存在的状态 Tom will come next week. 事物的固有属性或必然趋势 Fish will die without water. 对将来某个动作的安排、计划 He is going to speak on TV this evening.,9.将来完成时,用来表示在将来某个时刻(前)将完成的动作。常和by短语,when,before引起的时间状语连用。 We will have finished senior Book 2 by the end of this term.,10.过去将来时,过去某一时刻后将要发生的过去动作或过去的意图打算(主要用于宾语从句中); She was sure she would succeed. I thought you would come. 把一般将来时中的助动词变成过去式,便成了过去将来时的表达形式。 表示过去经常发生的动作。 When he was young, he would go swimming. 注意:would与used to的区别:would只表示过去,不涉及现在,而used to表示“过去常常”要与现在比较,即现在不是这样了。,11.要求一定时态的固定的句型,was/were doing sth. whendid sth.(正在做某事,这时突然) I was reading a book when the bell rang. was/were about to do sth. whendid sth. (正要做某事,这时突然) We were about to leave when the telephone rang. It(This) is(will be ) the first/second/thirdtime+ that Its the first time Ive seen her. We have been there three times. 如果句中有比较确定的时间状语,则服从时间状语的要求。 Last year I saw him many times.,It is/has been since It is (has been) two weeks since I came here. Hardly whenNo sooner than Hardly had we got in the crops when it began to rain. It(This) is(will be ) the first/second/thirdtime+ that Itll be the first time Ive spoken in public.,被动语态表示句子的主语是动作的承受者,也就是动作的对象,一般说来只有及物动词才有被动语态。其构成为“be+及物动词的过去分词“。助动词be有人称、数和时态的变化,其变化规则与be作为连系动词时完全一样。含有情态动词的谓语变化为被动语态时,由“情态动词(can, may must, have to等)+be +动词的-ed形式。含有“be going to , be to, used to, be about to“等结构的复合谓语变为被动语态时,其构成为“be going to (be to, used to, be about to)+ be +动词的-ed形式“构成。,动词语态,1.被动语态的适用范围,当我们不知道谁是动作的执行者,或者没有必要指出谁是动作的执行者时。这时不用by短语。 This jacket is made of cotton. 这件上衣是棉料的。 为了强调动作的承受者时 Visitors are requested not to touch the exhibits. 要求参观者不可触摸展品。 出于策略、委婉、礼貌等不提出动作的执行者 You are said to be active recently. 据说你最近很活跃。,常用于如下句型: Its not known that 不得而知 Its said that 据说 Its reported that 据报道 Its not decided that尚未决定 Its believed that 据认为 Its announced that据宣布,2.被动语态的句型,常见句式是:主语(受动者)be过去分词(by施动者)He was scolded by the English teacher. 主语get过去分词其它成分 The boy got drowned last summer 使用这种结构不能带有“by施动者” 在现代英语中大量地出现了由“get+及物动词的过去分词”构成的被动语态,这就叫做get-型被动语态。get-型被动语态中的过去分词数量有限。,get+及物动词的过去分词 get常同marry, beat, break, damage, tear, strike, hurt, paint, invite, repair, dress, pay, wound等动词的-ed形式连用,构成被动语态。这种结构一般指动作的结果而非动作本身,常指“最后终于,突然发生“等意义。 He got wounded in the battle. 他在战斗中受伤了。 The boy got hurt on his way home from work. 男孩在回家的路上受伤了。,get-型被动语态一般不宜用在含有双宾语的结构中,也不宜与see, hear, watch, listen to等感官动词构成被动语态。 The old man was offered a large sum of money. (正)有人给了这位老人一大笔钱。 The old man got offered a large sum of money. ( 误) get-型被动语态有时有言外之意或具有感情色彩 He got taught a lesson. 他被教训了一顿。(有“活该”之意) get-型被动语态有时表示开始进入某种状态,而be+动词的-ed形式只表示存在的状态。 She got tired. 她感到累了。(有开始感到疲劳的含义) She was tired. (只表示”她累了”),带有双宾语(直接宾语和间接宾语)的主动句变为动句,其主语可以是直接宾语,也可以是间接宾语。 She lent me a bike.被动:I was lent a bike(by her). A bike was lent to me(by her). 情态动词be过去分词 This problem must be worked out in half an hour. 双重被动式:主语被动式谓语不定式的被动式其它成分 These magazines are not allowed to be taken out of the reading-room. The murderer was ordered to be shot.,3.主动表示被动的几种情况,不及物动词与状语连用,用以表示主语的品质和状态 常见动词是:cut,sell,read,write,fill,cook,lock,wash,drive,keep等 This knife cuts well.这把刀好切。 These books sell well.这些书好卖。 肉在这样热的天气里放不长久。 The cloth washes well.这种布好洗。 一些连系动词的主动式形容词。常见动look,smell,taste,sound,feel,prove,turn out等 The apples taste good. The flower smells wonderful. The news proved/turned out true,4.不可以变为被动语态的几种情况,当句子的宾语是反身代词时(因为反身代词不可作主语) He can dress himself. 他能自己穿衣服。不可变为Himself can be dressed by him. 当句子的宾语是相互代词时(因为相互代词不可作主语) We help each other/one another.不可变为Each other/One another is helped by us. 动宾结构的固定短语只能用于主动式,不能用被动式 He lost heart.不可变为Heart was lost by him. 类似lose heart词组的还有make a face,keep silence,keep words,lose in thought等等,take part in, belong to ,own, have,hate,fail,contain等表状态动词没有被动语态 She took part in the sports meet.不能变为The sports meet was taken part in by her. 当have, cost, fit, last, hold等表示状态的及物动词作谓语时 Our village has twenty tractors.我们村有20台拖拉机 The hall can hold 2000 people. 这个大厅能盛2000人 The war lasted four years. 这场战争持续了4年,当某些及物动词(如leave, enter, join,等)的宾语是表示处所、地点或组织时 The students entered the classroom one by one. 学生门陆续地进了教室。 My father left his hometown five years ago. 我父亲5年前离开了家乡。 当句子的宾语是同源宾语时 The Browns live a happy life. 布朗一家过着幸福的生活。 当句子的宾语为行为者(主语)身体上某一部分时 I couldnt believe my eyes when I saw him still alive. 看到他还活着,我简直不相信自己的眼睛。,当用非谓语动词作宾语时 He likes studying English. 他喜欢学习英语 I wish to go there myself. 我想亲自去那里一趟 注意:少数以不定式(短语)做宾语的动词(如agree, feel, decide, think等)可以变为被动句,但不能以不定式(短语)直接做被动句的主语,而要借助it为先行主语,将不定式(短语)置于谓语动词之后 He has decided to go and study abroad. It has been decided(by him)to go and study abroad. 他已决定出国留学。,非谓语动词,在介绍非谓语动词之前,先对句子的成份稍加说明。每一种语言都涉及几个主要的句子成份,主语、谓语、宾语和状语、定语。母语为中文的英语学习者,对于成份的掌握一般并不是那么清晰,因为汉语的成份意识并没有英语那么显性。在英语语言中,一个完整的句子一般都具有主语+谓语+宾语。简单说来主语是动作发出者,谓语是表示动作的词,由动词充当。宾语是动作承受者。其中除非是并列的谓语,一个句中中能允许存在一个谓语,不然则应把其它的动词转换成非谓语动词的形式。所以,一定要把这一意识融入脑袋里,否则在写作中很多英语学习者都会出现run-on sentence 或是fragment sentence。,非谓语动词是指在句子中不是谓语的动词,主要包括不定式、动名词和分词(现在分词和过去分词),即动词的非谓语形式。非谓语动词除了不能独立作谓语外,可以承担句子的任何成分。 在句子中充当除谓语以外的各种句子成分的动词形式叫做非谓语动词(the Non-Finite Verbs)。非谓语动词也是动词的一种,他们有着动词的其他特点,可以充当主语、宾语、状语等。非谓语动词与谓语动词是相对的概念。,谓语动词VS非谓语动词,(一)相同点 1如果是及物动词都可与宾语连用,例如: They built a garden. They suggested building a garden. 2都可以被状语修饰: The suit fits him very well. The suit used to fit him very well.,3都有主动与被动,“体”式(一般式;进行式;完成式)的变化。例如: He was punished by his parents.(谓语动词被动语态) He avoided being punished by his parents.(动名词的被动式) We have written the composition.(谓语动词的完成时) Having written the composition, we handed it in.(现在分词的完成式),4都可以有逻辑主语 They started the work at once.(谓语动词的逻辑主语) The boss ordered them to start the work.(动词不定式的逻辑主语) We are League members.(谓语动词的主语) We being League member,the work was well done. (现在分词的逻辑主语),(二)不同点 1非谓语动词可以有名词作用(如动词不定式和动名词),在句中做主语、宾语、表语。 2非谓语动词可以有形容词作用(如动词不定式和分词),在句中做定语、表语或宾语补足语。 3非谓语动词可以有副词作用(如动词不定式和分词),在句中作状语。 4谓语动词在句中作谓语,受主语的人称和数的限制;非谓语动词在句中不能单独作谓语,它不受主语的人称和数的限制。 5英语中不能单独做句子的谓语。,这是我在网上看到的关于语法树状图的图片,可以作为参考,一、动词不定式,动词不定式:(to)+do,具有名词、形容词、副词的特征。 否定式:not + (to) do 以do为例,动词不定式的构成如下:,1一般式:不定式的一般式所表示的动作与谓语动词动作同时发生或发生在谓语动词动作之后. 例如: Im nice to meet you. 很高兴见到你。 He seems to know a lot. 他看起来懂得很多。 We plan to pay a visit. 我们计划花钱去参观。 He wants to be an artist. 他想成为一个艺术家。 The teacher ordered the work to be done. 老师要求完成工作。,2进行式:不定式的进行式所表示的动作与谓语动词动作同时发生,例如: The boy pretended to be working hard. 男孩假装工作得很努力。 He seems to be reading in his room. 看起来他正在他的房间里面读书。 3完成式:不定式的完成式表示的动作发生在谓语动词动作之前,例如: I regretted having told a lie. 我后悔我说谎了。 He is pleased to have met his friend. 他很高兴能遇上他的朋友。,不定式的句法功能:,(1)作主语: To finish the work in ten minutes is very hard. 十分钟之内完成这项工作是很难的。 动词不定式短语作主语时,常用it作形式主语,真正的主语不定式置于句后,例如上面两句可用如下形式: It is very hard to finish the work in ten minutes. 十分钟之内完成这项工作是很难的。 (2)作表语: Her job is to clean the hall. 她的工作是打扫大厅 He appears to have caught a cold. 他似乎感冒了。,3作宾语: 常与不定式做宾语连用的动词有: want,hope,wish,offer,fail,plan,learn,pretend,refuse,manage,help,agree,promise,prefer,如果不定式(宾语)后面有宾语补足语,则用it作形式宾语,真正的宾语(不定式)后置,放在宾语补足语后面,例如: Marx found it important to study the situation in Russia. 马克思发现研究俄国的情况是很重要的。,4作宾语补足语: 在复合宾语中,动词不定式可充当宾语补足语,如下动词常跟这种复合宾语:want,wish,ask,tell,order,beg,permit,help,advise,persuade,allow,prepare,cause,force,call on,wait for,invite. 有些动词如make,let,see,watch,hear,feel,have等与不带有to的不定式连用,但改为被动语态时,不定式要加to,如:I saw him cross the road. 我看见他横过公路。 He was seen to cross the road. 他被我看见横过公路。,5作定语: 动词不定式作定语,放在所修饰的名词或代词后。与所修饰名词有如下关系: 动宾关系: I have a meeting to attend. 我有一个会议要出席。 注意:不定式为不及物动词时,所修饰的名词如果是地点、工具等,应有必要的介词,如: He found a good house to live in. 他找到了一个居住的好房子。 说明所修饰名词的内容: We have made a plan to finish the work. 我们制定了一个完成工作的计划。 被修饰名词是不定式逻辑主语: He is the first to get here. 他第一个来到这儿。,6作状语: 表目的: She sold her hair to buy the watch chain. 她卖掉了自己的头发来买那条表链。 注意不定式放句首时,逻辑主语与句子主语要一致: wrong:To save money,every means has been tried. right:To save money,he has tried every means. 为了省钱,他使出了浑身解数。 wrong:To learn English well,a dictionary is needed. right:To learn English well,he needs a dictionary. 为了学好英语,他需要一本词典。,表结果(往往是与预期愿望相反的结果 意料之外):常放在never only后 He arrived late only to find the train had gone. 他来晚了,只见火车已经走了。 I visited him only to find him out. 我去拜访他,只见他出去了。 表原因:常放在形容词后面 They were very sad to hear the news. 他们听到这条新闻非常伤心。 表程度: Its too dark for us to see anything. 太暗了,我们什么也看不见。,7作目的状语:既可以放在句首,也可以放在句尾 To tell you the truth, I dont like the way he talked. 说实话,我不喜欢他讲话的方式。 8不定式的省略:保留to省略do动词。 If you dont want to do it, you dont need to. 如果你不想做这件事,你就不必做。 9不定式的并列:第二个不定式可省略to。 He wished to study medicine and become a doctor. 他希望学医并成为医生。,动名词的形式:V-ing 否定式:not + 动名词,二、动名词,1一般式: Seeing is believing. 眼见为实。 2被动式: He came to the party without being invited他未被邀请就来到了晚会。 3完成式: We remembered having seen the film. 我们记得看过这部电影。 4完成被动式: He forgot having been taken to Guangzhou when he was five years old.,5否定式:not + 动名词 I regret not following his advice. 我后悔没听他的劝告。 6复合结构:物主代词(或名词所有格)+ 动名词 He suggested our trying it once again. 他建议我们再试一次。 His not knowing English troubled him a lot. 他不懂英语给他带来许多麻烦。,三、分词,分词分为现在分词和过去分词。,现在分词,现在分词既具有动词的一些特征,又具有形容词和副词的句法功能。 现在分词的形式: doing 否定式:not + 现在分词 1现在分词的主动语态:现在分词主动语态的一般式表示与谓语动词所表示的动作同时发生,完成式表示的动作在谓语动词所表示的动作之前发生,常作状语。例如: They went to the park,singing and talking. 他们边唱边说向公园走去。 Having done his homework,he played basket-ball. 做完作业,他开始打篮球。,2现在分词的被动语态:一般式表示与谓语动词同时发生的被动的动作,完成式表示发生在谓语动 词之前的被动的动作。 The problem being discussed is very important. 正在被讨论的问题很重要。 Having been told many times,the naughty boy made the same mistake. 被告诉了好几遍,这个淘气的孩子又犯了同一个错误,动名词(gerund)VS现在分词(present participle),相同点:动名词和现在分词在表现形式上都为动词+ing,二者都保有动词的一些特性,都具有完成式和被动语态,动名词在很大程度上等同于现在分词,前者侧重于词性层面,后者侧重于词形层面,所以很多时候难以区分。事实上大部分时候由于其性质及表现形式的类似性,能否将二者分别开来并不具有实际意义。 不同点:所谓动名词(gerund)就是名词,只是保有一些动词的功能.所以它在句中可以作主语,宾语,表语,同位语,定语等那些名词可以充当的成分. 而现在分词(present participle)相当于形容词或副词,在句中作定语或者状语 当-ing形式出现在句中作状语时,它肯定是present participle.,Reading aloud is very helpful. 朗读是很有好处的。(动名词,充当主语) They havent finished building the dam. 他们还没有建好大坝。(动名词,充当宾

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