part的用法总结大全
part的用法总结大全
part的意思是什么呢?part的用法是怎样的呢，快来了解一下吧，今天给大家带来了part的用法,希望能够帮助到大家，一起来学习吧。
part的用法总结大全
part的意思
n. 部分,零件,参加,地区
vt. 使分裂,拆移,使分开
vi. 分开,分离,分岔
adv. 不完全地，部分地
adj. 不完全的，部分的
变形：过去式: parted; 现在分词：parting; 过去分词：parted;
part用法
part可以用作名词
part用作名词时的基本意思是某整体中的“部分”“局部”,是可数名词,用于单数形式时,前面的不定冠词常省略。
part也可作“…分之一,等份”解,以构成整体。
part还可作“零件,部件”解,是可数名词。
part用作名词的用法例句
This piece of glass seems to be part of a lamp.这片玻璃似乎是一盏灯的一部分。
This is one of the nicest parts of San Francisco.这是旧金山最好的地方之一。
He liked the feeling of being part of the team.他喜欢成为这个队伍的一部分。
part可以用作动词
part的基本意思是“使分裂开”,指由于受外力作用而使物体碎成几部分或断裂为几段或把某物〔某人〕分成几部分; 也可指某人离开某人或友好地分手; 还可指用梳子等工具把头发等分开。
part既可用作及物动词,也可用作不及物动词。用作及物动词时,可接名词或代词作宾语。
part用作动词的用法例句
The cable suddenly parted.缆索突然断裂。
The crowd had parted to let them through.人群分散开好让他们通过。
Its sad that we have to part company with them.很遗憾我们
要与他们分别了。
part用作动词的用法例句
Their feelings were part excitement, part fear.他们即兴奋又
害怕。
The development is part-financed by the Energy Department.部分开拓基金是由能源部提供的。
part用法例句
1、These days work plays an important part in a single womans life.
现在，工作在单身女性的生活中起着重要作用。
2、He was in large part a journalist and propagandist.
他很大程度上是个新闻记者和宣传者。
3、673 private golf clubs took part in a recent study.
673家私人高尔夫俱乐部参与了最近的研究。
词汇精选：part的用法和辨析
一、详细释义：
adj.
不完全的，部分的
例句：
His feelings were part happiness, part sorrow.
他喜忧参半。
adv.
不完全地，部分地
例句：
His tuition fee is part funded by a local benefactor.
他的部分学费是由当地的一位好心人资助的。
例句：
The television producer today has to be part news person, part educator.
今天的电视制片人必须既是新闻人，又是教育者。
n.
部分[U]
例句：
We spent part of the morning in the library.
我们上午在图书馆待了一会儿。
例句：
They give the consumers only part of the story.
他们只向消费者透露部分情况。
零件[C]
例句：
The parts of a cell phone include the speaker, keyborad, antenna, screen, etc..
手机由扬声器、键盘、天线、屏幕等零件构成。
例句：
When the machine breaks down, the spare parts should be used.
如果机器坏了就换上备用零件。
角色[C]
例句：
中考英语口语辅导：consider的用法
中考英语口语辅导：consider的用法 表示“考虑”，其后可接动名词，但不能接不定式。如He is considering changing his job. 他在考虑调换工作。I’ve never really considered getting married. 我从未考虑过结婚的事。注：consider 之后虽然不能直接跟不定式，但可跟“疑问词＋不定式”结构。如Have you considered how to get there / how you could get there. 你是否考虑过何到那儿去？2. 表示“认为”、“把……看作”，下面三个句型值得注意(有时三者可互换) (1) consider ＋that从句(2) consider＋宾语＋(as ＋)名词或形容词(3) consider＋宾语＋(to be ＋)名词或形容词I consider him (as) honest (或an honest man). I consider him (to be) honest (或an honest man). I consider that he is honest (或an honest man). 注：(1) 以上备句意思大致相同，对于consider 之后能否接as 的问题，尚有不同看法(即有人认为不能接as ，有人认为可以拉as，但实际上接as 的用法已很普遍)。(2) 在“consider＋宾语”之后除可接to be 外，有时也可to do 型动词(但多为完成形式)。如We all considered him to have acted disgracefully. 我们都认为他的行为很不光彩。
过去完成时态用法小结
过去完成时态的用法小结 默认分类2009-12-27 12:54:52 阅读281 评论0 字号：大中小订阅 一、过去完成时适用场合 1. 过去完成时表示在过去某一时间或动作以前已经完成了的动作。这个过去的时间常用by，before等介词短语或一个时间状语从句表示，也可以暗含在上下文中。 I had finished my homework before supper.我在晚饭前就把作业做完了。 The play had already started when we got to the theatre. 我们到剧场时戏已经开始了。 By the end of June they had treated over 10,000 patients. 到六月底他们已经治疗了一万多病人。 2. 过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或还要持续下去，常与for，since等词连用。如： He had served in the army for ten years before he retired last year. 他在部队干了十年，去年退役了。 He told me that he had known her since he was a child. 他告诉我他从小就认识她。 He had learned English for eight years before he went to England for further study. 他在去英国深造前，已学了八年英语。 3. 在一段情景连贯的文字中，先发生的事放在后面叙述时，要用过去完成时。如： Tom flew home, but his father had already died. 汤姆乘飞机回家，他的父亲却已经去世了。4. 过去完成时也用于hardly...when..., no sooner...than..., It was the first time + that分句等一些固定句型中。 He had no sooner left the room than they began to talk about him. 他刚离开房间，他们就议论起他来。 We had hardly begun when we were told to stop. 我们刚开始就被叫停。 It was the first time that he had ever spoken to me in such a tune.他用这样的语调跟我讲话，这是第一次。 二、过去完成时与一般过去时的比较 1. 当一个由before, after, as soon as 等连词引导的从句所表示的动作和主句的动作紧接着发生时，两个动作均可用一般过去时来表示。 We had breakfast after we did morning exercises. 做完早操后，我们吃早饭。 The train started to move just before he reached the platform. 他到月台时火车刚开走。 They started ploughing as soon as they got to the fields. 他们一到地里就开始耕地。 2. 按时间顺序叙述两个或两个以上接连发生的动作时，用一般过去时。 He entered the room, turned on the light and sat down at the table. 他走进屋子，打开灯，坐在桌子旁。 3. 在表示某人过去未曾完成的“心愿”、“打算”、“计划”、“想法”、“许诺”等时，hope, mean, plan, think, intend等谓语动词常用过去完成时。 I had hoped to be back last night, but I didn’t catch the train. 我本来希望昨晚回来的，但没搭上火车。 We had thought to return early but they wouldn’t let us go. 我们本想早回来的，但他们不让我们走。 4. 在表示过去的句子中出现常与完成时态连用的词，如：already，yet，since，for，ever，never及次数名词等时，常用过去完成时来表示。
最新过去分词作状语的用法归纳
过去分词作状语 一．过去分词作状语的基本用法： 过去分词作状语主要是说明谓语动作发生的背景或条件；表示原因、时间、条件、让步、方式或伴随情况等。过去分词可置于主句前，也可置于主句后，用逗号与主句隔开。 1. 原因状语 Choked by the heavy smoke, he could hardly breathe. 他被浓烟呛了，几乎不能呼吸了。 Caught in a heavy rain, he was all wet. 因为淋了一场大雨，所以他全身湿透了。Frightened by the n oise in the night, the girl didn’t dare to sleep in her room. 受到夜晚响声的惊吓，那姑娘不敢睡在她的房间。 2. 时间状语 Left to itself in the room, the baby began to cry.当被孤独地留在房间里时，婴儿哭了起来。 Asked why he did it, the monitor said it was his duty. 当被问及这件事时，班长说这是他的职责。 Approached in the dark, the lights looked lonely and purposeless. 在黑暗中走近时。那些电灯显得孤单而无意义。 3. 条件状语 Seen in this aspect, the matter isn’t as serious as people generally suppose. 如果从这个角度看，问题并不像人们一般预料的那样`严重。 Grown in rich soil, these seeds can grow fast. 如果种在肥沃的土壤里，这些种子能长得很快。 Given better attention, the accident could have been avoided. 要是多加注意，那次事故就能避免了。 Watered more, these cabbages could have grown better. 如果多浇点水，这些大白菜还可以长的得更好。 Compared with you, we still have a long way to go. 和你相比，我们还有很大的差距。 4. 方式或伴随状语 Surrounded by his students, the professor sat there cheerfully. 那位教授在学生的簇拥下，兴高采烈地坐在那儿。 He stood there silently, moved to tears. 他静静地站在那里，被感动得热泪盈眶。The old man went into the room, supported by his wife. 那位老人在妻子的搀扶下,走进了房间。 5. 让步状语 Beaten by the police and sent to jail, Gandi created the principle of nonviolent resistance. 尽管受警察的殴打，被投入监狱，甘地却首创了非暴力抵抗的原则。Defeated again, he didn’t lose heart. 尽管再次被击败，但他没有灰心。
不定代词用法总结
不定代词总结 一、不定代词 some 与 any 的用法区别 一般说来，不定代词some 用于肯定句中，any 用于否定句和疑问句中。但是，在表示请求、邀请或征求意见的句子中，通常要用 some 而不用any： Would you like some cake 吃点蛋糕吗 Why not buy some bread 为什么不买些面包呢 Shall I get some chalk for you 要我帮你拿些粉笔来吗 【说明】不定代词any 有时也用于肯定句中，此时表示“任何”： Any colour will do. 任何颜色都行。Come any day you like. 随便哪天来都可以。 二、不定代词 many 与 much 的用法以及区别 不定代词many 和 much 都表示“许多”，但 many 修饰或代替可数名词(复数)，与 few(少数)相对；而 much 用来修饰或代替不可数名词(单数)，与little(少量)相对。在口语中两者主要用于非肯定句中： Did you see many people there 你在那儿看见许多人了吗 We don’t have much time. 我们没有许多时间。 Much work has been done. 许多工作都已经做了。 You’ve given me too much. 你已给我太多了。 Take as many (much) as you want. 你要多少拿多少。 I asked her a great many questions. 我问了她许多问题。 辨析：too much；much too； too many 1、too much常用作副词或代词,也可以用作形容词修饰不可数名词.如： Is watching TV too much good or bad for your health电视看得太多对你的健康有益还是有害 You've given me too much.你给我的太多了. We've had too much rain lately.最近我们这里的雨下得太多了. 2、much too常作副词,后接副词或形容词.如： He drove much too fast.他开车开得太快了. It is much too cold.天实在太冷了. 3、too many常用作形容词,修饰可数名词复数.如：
consider的基本用法及与regardthinkofabout
consider的基本用法及与regard,think ofabout和look(up)on as的区别 consider的基本用法及与regard,think of/about和look(up)on as的区别 consider一词在历年高考中是一个常考的要点，其用法应分为两部分来讲。第一、作“考虑、思考”时的搭配如下： 1．consider+n./pron.，例如： Have you considered the suggestion? That’s what we have to consider now. 2．consider+v-ing，但不能接不定式的一般式，例如： We considered going to see the doctor the next day. Have you considered moving to shanghai recently? You must consider to tell him something about it.(错误) 3．consider+疑问词+不定式，例如： He is considering how to improve his English. We must consider what to do next.
4．consider+从句，例如： We didn’t consider whether he should go or not. Have you considered when we should go there? 第二、作“认为、把……当作/看作”等意思时的搭配如下：1．consider+sb/sth+(to be/as)+n./adj.，例如： I consider him to(be/as)my best friend. Everyone considers him(to be)clever. He considered it much improved. 2．consider+sb./sth.+不定式短语（作宾语补足语），不能接不定式的一般式，例如： We consider them to be working very hard. We consider them to have finished the work. We consider him to be the clever in our class. We must consider him to go there at once.(错误) 3．consider+it+adj./n.+不定式短语，其中it为形式宾语，不定式短语为真正的宾语，例如： Jiao Yulu considered it his duty to serve the people heart and soul. They consider it necessary to set the slaves free.
过去完成时知识点总结和题型总结(word)
过去完成时知识点总结和题型总结（word） 一、初中英语过去完成时 1．—We all went to the park except you last weekend. Why didn't you come? —Because I the park twice. A. have gone to B. had gone to C. had been to D. have been to 【答案】 C 【解析】【分析】have gone to去了（尚未回）．have been to去过（已回），根据句意在last weekend之前去过，所以用过去完成时，故选C。 【点评】本题考查过去完成时的用法，表示在过去某一时间前已经发生的动作。 2．Sue didn't go to see the film with us last week because she ________________ it with her mother. A. has seen B. had seen C. will see D. saw 【答案】 B 【解析】【分析】句意：苏上星期没和我们一起去看电影，因为她和她妈妈一起看过了。 A.已经看了，现在完成时； B.已经看了，过去完成时； C.将看，一般将来时； D.看了，一般过去时。Sue和妈妈看了电影的影响是上周Sue没有和我们看电影，所以用完成时，根据didn't可知是与过去有关，所以用过去完成时，结构是had+动词过去分词，see的过去分词是seen，故选B。 【点评】考查过去完成时，注意平时识记其结构，理解句意。 3．Jake _____his key in the office so he had to wait until his wife _______ home. A. has forgotten … comes B. forgot… come C. had left… came D. had left…would come 【答案】 C 【解析】【分析】句意：杰克把他的钥匙丢在办公室了，因此他不得不等到他的妻子回家。结合语境可知前文描述的是过去某时前已经完成的动作，故用过去完成时态。下文指的是过去某时的动作，故用一般过去时态。选C。 【点评】英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型，首先要注意句子中的时间状语，如果没有则要通过分析上下文，结合语境来判断句子的时态。 4．When I ______ the cinema, the film _______for ten minutes A. got to; has begun B. arrived at; has been on C. reached; had begun D. hurried to; had been on
过去分词用法归纳
过去分词用法归纳-标准化文件发布号：（9556-EUATWK-MWUB-WUNN-INNUL-DDQTY-KII
过去分词用法归纳 Mar 7, 2011 过去分词主要表示被动，可表示发生在过去，所以叫过去分词。也可以无时间概念，只表示被动。过去分词用法：状语、定语、补语、表语。 一．状语 情况 1：表“被动”的状语从句可简化成过去分词做状语。表示条件、时间、让步的连词可保留，如if, when, although。表原因的不保留，如because 等。 1) He won’t go to the party tomorrow, if he is not invited. He won’t go to the party, if not invited. 2) When she was asked about her age, she kept silent. When asked about her age, she kept silent. 3) Once it is formed, a bad habit is hard to kick. Once formed, a bad habit is hard to kick. 进一步练习: 1) If it is seen from the mountain, the city looks more beautiful. Seen from the mountain, the city looks more beautiful. 2) If it is heated to 100 degrees Centigrade, water boils. Heated to 100 degrees Centigrade, water boils. 3) The problems, if they are not solved properly, will seriously affect the relations of nations. The problems, if not solved properly, will seriously affect the relations of nations. 4) Although he was warned of the danger, the boy still went skating on the ice. 2
不定代词用法总结
不定代词用法总结-标准化文件发布号：（9556-EUATWK-MWUB-WUNN-INNUL-DDQTY-KII
不定代词用法总结 1) some, any, no的用法 a. some和any通常用于表示不定数或不定量，修饰复数可数名词或不可数名词。some表示“几个；一些；部 分”，多用于肯定句；而any表示“一些；什么；任何；”，对用于否定句或疑问句中。如： * He asked me some questions. (他问了我几个问题。) * Some of the bread has been eaten. (面包已吃了一些。) * Are there any stamps in this post office (这个邮局里有邮票吗？) * I didn’t have any cigarettes, so I went out to buy some. (我没有香烟了，所以出去买了一些。) b. 刚才我们说some一般用于肯定句而any一般用于否定句和疑问句。但有时也有例外。这要根据句子意思来 看。 * I could not answer some of his questions. (我不能回答他的某些问题。) (some用在否定句中表示“一些；部分”。如果说成：I could not answer any of his questions.意思就变了，它表示“我不能回答他的任何问题。”) * Will you get me some apples on your way back (你回来的路上能给我带一些苹果吗？) (some用在疑问句中大多表示“请求” 或“建议”) * Let me know if you hear any news. (如果你有任何消息请告诉我。) (any用在条件从句中表示“任何”) * “What would you like to drink” “Any will do.” (“你想喝什么？”“哪种都行。”) (any在这里表示“任何”) c. no在句子中作定语，表示否定，意思是“没有；不是”，它可以修饰可数名词的单数和复数形式或不可数名 词。 * There are no letters for you today. (今天没有你的信。) * I have no money at the moment. Could you lend me some (我现在没有钱。你能借我一些吗？) 2) 复合不定代词的用法 a. 不定代词some, any, no与-one, -body, -thing可以组成九个复合代词。它们是： someone anyone no one somebody anybody nobody something anything nothing 这些复合不定代词只有名词的性质，可以作主语、宾语等。 b. 因为some一般用于肯定句，any一般用于否定句或疑问句，no表示完全否定，因此由some, any, no与-one, - body组成的复合代词的用法也一样。 c. 第二部分为-one和-body的复合代词只用于表示人，它们的形式是单数形式，但有时可以用they或them指 代。 * There is someone in your office. Can you hear them talking (你办公室里有人。你听见他们说话了吗？) d. 第二部分为-thing的复合代词只能用于指物。如： * There was something wrong with the car so he had to stopped it. * He looked at me and didn’t say anything. * Nothing can be done to save her life. e. 这些复合不定代词如果有其它的形容词修饰，形容词必须后置。如： * Somebody important has arrived, I’m sure. (important修饰somebody) 3) one和none的用法 不定代词one指代可数名词的单数，即指人，也指物。它的复数形式是ones。在句中可以作主语、宾语、定语等。 * He is not the one who is easily cheated. (one指人) * I’ve made some cakes. Would you like one of them (one指物) * I prefer red roses to white ones. (ones指物) * Are they the ones who moved here a few days ago (ones指人) 4) all, every, each, other, another, either, neither, both a. every只有形容词的性质，在句中作定语。常用于修饰单数的可数名词。表示“每个；各个”，还可以表示“一 切”。 * After the strong wind every flower in the garden was gone. every还可以和-one, -thing, -body构成复合不定代词，即：everyone, everything, everybody。其中，everyone和everybody用于指人，意思一样，都是“每人；大家”，形式上表示单数意思上可以表示单数也可以表示复数。everything用于指物，意思是“每件事；一切”，形式上表示单数意思上可以表示单数也可以表示复数。如：* One can’t have everything. * Everything goes well with me. * The town is so small that everybody knows everybody else. 注意：在使用everyone时要注意和every one相区别。everyone是一个不定代词而every on是一个词组，前者只能指人而后者既可以指人也可以指物。请注意下列例句： * Everyone will be here except Patrick. (everyone 指人) * Every one of the children will get a gift. (every one也指人) *We played several matches against the visitors, but unluckily lost every one. (every one指物)
Consider的用法
Consider的用法： -Have you considered_____ the job ss a teacher? -Yes.I like it because a teacher is often considered _______ a gardener. A.to take,to be B.to take,being C.taking,being D.taking,to be 答案：d译文：你考虑过做老师的工作吗？ 是的，我非常喜欢，因为老师通常被认为是园丁 一、consider作“考虑”解，常用于以下句型： 1．consider+名词/代词/动名词。 You'd better consider my suggestion. 你最好考虑我的建议。 I’m considering going abroad some day.我一直考虑有一天出国。 2．consider+从句或“疑问词+不定式”。 Have you considered what he suggested? 你们考虑他的建议了吗？ We must consider what to do next. 我们必须考虑下一步要做什么。 二．consider作“认为”解时，常用于以下句型： 1．consider sb./sth+.(as)+形容词/名词。其中，as可以省略。 We consider him honest. 我们认为他很诚实。 At first they considered me as a doctor.起初他们认为我是医生。 2.consider+sb./sth.+不定式。其中，不定式通常是to be(可以省略)或其他动词的完成式。We consider this matter to be very important. 我们认为这件事很重要。 We all consider him to have stolen the bike.我们都认为他偷了自行车。 3.consider+it+形容词/名词+不定式短语。 We consider it hard to study English well.我们认为学好英语很难。 I consider it my duty to help you with your studies.我认为帮助你学习英语是我的职责。 4.consider+宾语从句。 We consider that the music is well worth listening to.我们这首音乐很值得一听。 在该题中，前一个句子中的consider作“考虑”解，后接动名词作宾语，但不可接不定式，由此可以排除A, B; 后一个句子中的consider作“认为”解，用到句型consider+sb./sth.+不定式，此处使用的是被动语态结构。故答案为D项。 请看下面两道考题，均考查“with+宾语+非谓语动词”结构： 1.—Come on, please give me some ideas about the project. —Sorry. With so much work _________my mind, I almost break down. A.filled B.filling C.to fill D.being filled 2.John received an invitation to dinner, and with his work _________, he gladly acc epted it. A.finished B.finishing C.having finished D.was finished 以上两题答案分别为B和A，均考查“with+宾语+非谓语动词”结构。该结果中的“非谓语动词”可以是不定式、现在分词、过去分词，它们在用法上的区别如下：
英语过去完成时的用法总结
英语过去完成时的用法总结 它表示句子中描述的动作发生在“过去的过去”。 基本结构 主语+had+过去分词vpp、(done) ①肯定句：主语+had+过去分词、 ②否定句：主语+had+not+过去分词、 ③一般疑问句：Had+主语+过去分词? 肯定回答：Yes,主语+had、 否定回答：No,主语+had not 、 ④特殊疑问句：特殊疑问词或词组+一般疑问句（Had+主语+过去分词）？ 基本用法表示在过去某一时刻或动作以前完成了的动作，也可以说过去的时间关于过去的动作。即“过去的过去”。可以用by, before等介词短语或一个时间状语从句来表示，也可以用一个表示过去的动作来表示，还可能通过上下文来表示。 例如： By nine o’clock last night, we had got200 pictures from the spaceship、到昨晚9点钟，我们已经收到200 张飞船发来的图片。 过去完成时-语法判定 1、由时间状语来判定
一般说来，各种时态都有特定的时间状语。与过去完成时连用的时间状语有： （1 ） by + 过去的时间点。如： I had finished reading the novel by nine oclock last night、 （2 ） by the end of + 过去的时间点。如： We had learned over two thousand English words by the end of last term、 （3 ） before + 过去的时间点。如： They had planted six hundred trees before last Wednesday、 2、由“过去的过去”来判定。 过去完成时表示“过去的过去”，是指过去某一动作之前已经发生或完成的动作，即动作有先后关系，动作在前的用过去完成时，在后的用一般过去时。这种用法常出现在： （1 ）宾语从句中 当宾语从句的主句为一般过去时，且从句的动作先于主句的动作时，从句要用过去完成时。在told, said, knew, heard, thought等动词后的宾语从句。如： She said that she had seen the film before、 （2 ）状语从句中
consider的用法归纳有哪些
consider的用法归纳有哪些 consider的用法：作名词 consideration作名词，意为careful thought and attention斟酌，考虑 Several considerations have influenced my decision.好几个因素影响了我的决定。 1.Consideration for顾及，体贴 He has never shown much consideration for his wife’s needs.他从来不顾及他妻 子的需要。 2.Under consideration在讨论/考虑中 Several projects are under consideration.好几个项目在讨论中。 There are some proposals under consideration. 有几个建议在审议中。 3.Take sth. into consideration考虑到某事，体谅 Your teachers will take your recent illness into consideration when marking your exams. 你的几位老师在给你的考试评分时，会考虑你最近生病这一情况的。 4.Leave sth. out of consideration 忽略/不重视某事 It was wrong to leave my feelings out of consideration.不顾及我的情感是不对的。 5.Show consideration for体谅，顾及 Jeff never shows any consideration for his mother’s feelings.杰夫从来不体谅他 母亲的感受。 6.of. No / little consideration无关紧要的，不重要的 Whether he would go with us or not was of no consideration. 他是否跟我们一起 去是无关紧要的。 7.In consideration of sth.作为对……的汇报，考虑到 It’s a small payment in consideration of your services.这是答谢您服务的微薄酬金。 consider的用法：作动词 1.Consider作动词，意为think about sth.考虑，斟酌 常用搭配：consider sth. / doing sth. / where(how, why)+to do /that clause; all things considered通盘考虑，考虑到问题的各个方面。如：
过去完成时用法小结
过去完成时用法小结 一、过去完成时适用场合 1. 过去完成时表示在过去某一时间或动作以前已经完成了的动作。这个过去的时间常用by，before等介词短语或一个时间状语从句表示，也可以暗含在上下文中。 I had finished my homework before supper.我在晚饭前就把作业做完了。 The play had already started when we got to the theatre. 我们到剧场时戏已经开始了。 By the end of June they had treated over 10,000 patients. 到六月底他们已经治疗了一万多病人。 2. 过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或还要持续下去，常与for，since等词连用。如： He had served in the army for ten years before he retired last year. 他在部队干了十年，去年退役了。 He told me that he had known her since he was a child. 他告诉我他从小就认识她。 He had learned English for eight years before he went to England for further study. 他在去英国深造前，已学了八年英语。 3. 在一段情景连贯的文字中，先发生的事放在后面叙述时，要用过去完成时。如： Tom flew home, but his father had already died. 汤姆乘飞机回家，他的父亲却已经去世了。4. 过去完成时也用于hardly...when...（刚…就…）, no sooner...than... （刚…就…）, It was the first time + that分句等一些固定句型中。 He had no sooner left the room than they began to talk about him. 他刚离开房间，他们就议论起他来。 We had hardly begun when we were told to stop. 我们刚开始就被叫停。 It was the first time that he had ever spoken to me in such a tune.他用这样的语调跟我讲话，这是第一次。 二、过去完成时与一般过去时的比较 1. 当一个由before, after, as soon as 等连词引导的从句所表示的动作和主句的动作紧接着发生时，两个动作均可用一般过去时来表示。 We had breakfast after we did morning exercises. 做完早操后，我们吃早饭。 The train started to move just before he reached the platform. 他到月台时火车刚开走。 They started ploughing as soon as they got to the fields. 他们一到地里就开始耕地。 2. 按时间顺序叙述两个或两个以上接连发生的动作时，用一般过去时。 He entered the room, turned on the light and sat down at the table. 他走进屋子，打开灯，坐在桌子旁。 3. 在表示某人过去未曾完成的“心愿”、“打算”、“计划”、“想法”、“许诺”等时，hope, mean, plan, think, intend等谓语动词常用过去完成时。 I had hoped to be back last night, but I didn’t catch the train. 我本来希望昨晚回来的，但没搭上火车。 We had thought to return early but they wouldn’t let us go. 我们本想早回来的，但他们不让我们走。 4. 在表示过去的句子中出现常与完成时态连用的词，如：already，yet，since，for，ever，
过去分词用法详解
过去分词的用法 一、构成：规则动词的过去分词是有动词原形+ed构成的，不规则动词则有各自构成。 二、基本特点：过去分词在句子中的基本用法有两点：1.与逻辑主语之间是被动关系 2.表示完成的动作 三、过去分词的用法： 1.作表语：过去分词作表语时，一般同时具备被动与完成的含义 例如：（1）The cup is broken.（2）He is retired. （3）After running,he is tired. 【注意】过去分词作表语时，已经变成形容词性质，主要表示主语的状态（被动完成）,而被动语态则表示动作. 例如：(1) The cup was broken by my little sister yesterday. 茶杯是昨天我小妹打碎的.(是被动语态,表示动作) （2）The cup is now broken. 茶杯碎了.(过去分词作表语,表示状态) 【注意】有些动词如interest, bore, worry, surprise, frighten 等通常用其过去分词形式来修饰人,表示“感到……” 用-ing 形式来修饰物，表示“令人……” 例如：The book is interesting and I'm interested in it. 这本书很有趣,我对它很感兴趣. 2.做定语 作定语用的过去分词其逻辑主语就是它所修饰的名词.及物动词的过去分词作定语,既表被动又表完成;不及物动词的过去分词作定语,只表完成. 1）单一过去分词作定语,常置于其所修饰的名词之前，称作前置定语。 例如：We must adapt our thinking to the changed conditions. 我们必须使我们的思想适应改变了的情况. 2）过去分词短语用作定语时,一般置于其所修饰的名词之后,相当于一个定语从句,称作后置定语。 例如：The concert given by their friends was a success.他们朋友举行的音乐会大为成功. 3）过去分词短语有时也可用作非限制性定语,前后常有逗号. 例如：The meeting, attended by over five thousand people, welcomed the great hero. 4）用来修饰人的过去分词有时可以修饰与人有关的表情，面貌，举止行为以及感觉等，这时不能用v-ing形式例如：The boy looked up with a pleased expression. His satisfied look showed that he had passed this exam. 3.作状语 作状语的过去分词在句子中多表示被动和完成两重含义。 1）时间状语：A.当和谓语动词动作同时发生时，一般仅表示被动,可以用when从句代替。 例如：Faced with difficulties,we shouldn’t withdraw for any excuse. B.当表示动作发生在谓语动词之前时，通常既表被动又表完成，可用after从句代替，也可用现在分词的被动完成形式代替。 例如：Caught by the police,the thief lay on the ground,crying and shouting. 2）原因状语：过去分词所表示的动作多有被动和完成两重含义。 例如：Written in a hurry, this article was not so good! 因为写得匆忙,这篇文章不是很好. Welcomed by all the students,we expressed own true thanks to them.被全体同学欢迎，我们表达真挚的感激【注意】有些过去分词因来源于系表结构,作状语时不表被动而表主动.这样的过去分词及短语常见的有: lost (迷路); seated (坐); hidden (躲); stationed (驻扎); lost / absorbed in (沉溺于); born (出身于); dressed in (穿着); tired of (厌烦). 等，这种结构可以改写成一个because引导的主系表结构句子。 例如：Lost / Absorbed in deep thought, he didn't hear the sound.因为沉溺于思考之中,所以他没听到那个声音. Tired of the noise,he decided to move to the country.因厌倦了噪音，他决定搬到农村去。 Dressed in an orange dress,she looked more beautiful than before.穿上橘红色连衣裙，她看起来比以前更美3）条件状语：作条件状语时，一般只表被动含义。相当于if引导的条件状语从句。 例如：Grown in rich soil, these seeds can grow fast. 如果种在肥沃的土壤里,这些种子能长得很快. 4）伴随情况：表示伴随谓语动词发生的另外动作，位于主语之后，用逗号隔开，可以同时表示被动与完成， 例如：The mother ran across the street,followed by her little son. 5）结果状语：表示发生在谓语动词后的动作，位于主句后用都逗号分开，也可以同时表示被动与完成。 例如：He listened to the hero’s story,moved to tears. 【注意】状语从句改成过去分词作状语时有时还可保留连词,构成"连词+过去分词"结构作状语. 例如：When given a medical examination, you should keep calm. 当你做体格检查时要保持镇定.