改革开放只有进行时没有完成时
改革开放只有进行时没有完成时
天津师大外院英语专业1105班李蕊
改革开放是决定当代中国命运的关键抉择，是党的十一届三中全会以来新时期最新鲜明的特点。简单来说，改革开放就是对内改革，对外开放。我国目前正处于社会主义的初级阶段，因此我们要通过改革进行自我完善和发展。同时，中国的发展也是离不开世界的，现在全球化趋势越来越明显，而不能顺势发展的将会落后甚至被淘汰，所我国应始终坚持对外开放。改革开始是一个漫长的发展过程，它既是我国社会主义制度自身的发展，也是我国对外关系的发展。因此，改革开放只有进行时没有完成时。
从哲学角度来说，发展是事物由小到大，由简到繁，由低级到高级，由旧物质到新物质的运动变化过程。事物的发展原因是事物联系的普遍性，事物发展的根源是事物的内部矛盾，即事物的内因。我国社会主义改造完成以后，毛泽东以中国的实践经验为基础，运用马克思主义基本原理，全面阐述了社会主义的矛盾问题。党的十一届三中全会以后，邓小平充分肯定了毛泽东关于社会主义社会基本矛盾的理论。我国目前社会主义主要矛盾是人民日益增长的物质文化需要同落后的社会生产之间的矛盾。同时生产关系和生产力之间的矛盾、上层建筑和经济基础之间的矛盾也是普遍存在的。为了解决社会主义初级阶段中所存在的一系列矛盾，其根本途径就是解放和发展生产力。而改革这是解放和发展生产力的必由之路。解放和发展生产力并不能一蹴而就，它需要实事求是，一切从实际出发，一步一个脚印的发展。
我国历史上也有过因为急于求成，想要求得迅速发展而出现的失误。因此邓小平在我国改革开放全面展开的历史进程中，反复强调稳定是中国现实社会主义现代化发展战略的必要前提。改革是动力，发展是目的，稳定是前提。因此，改革将会是一个漫长的过程。
与此同时，坚持对外开放也是我国始终坚持的一项国策。我国在清朝时期，曾因为闭关锁国和实行海禁政策而错过第一次与第二次工业革命，从而造成了落后，又因为落后被列强侵略将近百年。我们应以史为诫。中国的发展离不开世界，这是对中国发展历史的深刻总结。关起们来搞建设是行不通的。中国作为一个发展中的大国，在实现现代化的进程中存在着许多困难与问题，因此我们需要通过对外开放，充分利用国内和国外两种资源，两个市场，参与国际分工。中国是处于社会主义初级阶段的发展中国家，因此在进行现代化建设时，要立足于国情，开发中国的资源，开拓国内市场。但中国同时是世界的一部分，中国的经济不能离开世界经济孤立地发展，而应从中国的特点出发，开发国际市场，充分利用国际资源，建立起一个与世界经济相适应的开放经济。从根本上来讲，对外开放的核心也是发展生产力。经济全球化对我们来说既是机遇也是挑战，因此在实行对外开放的同时我国也始终坚持独立自主，自力更生，而非盲目的对外开放，从而是我国的经济可以在稳定中求得发展。
发展是一个循序渐进的过程，我国应在稳定中求得发展，不能急于求成。改革开放并非救急之举，而是我们需要始终贯彻落实的一项原则，是不断完善我国社会主义制度的根本途径，因此改革开放没有
终点，我国也在发展的过程中不断完善改革开放的方式方法，其根本目的就是解放与发展生产力，改善人民生活，缓和社会矛盾。矛盾是无法消除的，矛盾是普遍存在的，因此，改革开放只有进行时没有完成时。
新概念现在完成时练习题及答案
创作编号： GB8878185555334563BT9125XW 创作者：凤呜大王* 新概念的现在完成时练习卷 Exercise: I. Fill in the blanks with the proper form. 1. I____ already ____ (see) the film. I ________ (see) it last week. 2. _____ he ____ (finish) his work today? Not yet. 3. My father ____ just ____ (come) back from work. He is tired now. 4. Where’s Li Ming ? He __________ (go) to the teacher’s office. 5. I __________ (work) here since I ______ (move) here in 1999. 6. So far I _______________(make) quite a few friends here. 7. How long ________ the Wangs ______________(stay) here ? For two weeks. 8. I ________ just ___________ (finish) my homework. 9. He ________ (go) to school on foot every day. 10.____ you ______ (find) your science book yet? 11. If it ____ (be) fine tomorrow, I'll go with you. 12. The students ____________ (read) English when the teacher came in. 13. Look! The monkey __________ (climb) the tree. 14. My mother __________ (come) to see me next Sunday. 15. I've lost my pen. _________ you ________ (see) it anywhere? II. Choose the best answer. 1. How long have you _______ here? A. come B. got C. arrived D. been 2. My grandpa died _________. A. at the age of my 2 B. for 2 years C. when I was 2. D. my age was 6. 3. Jane has _____ to BeiJing. She will come back tomorrow. A. been B. gone C. went D. never been 4. It is ten years _____ I last saw her. A. after B. since C. for D. that 5.--Who will go to the station to meet Lorry? --I will. I _____ her several times. A. met B. have met C. had met D. will meet 6. --What a nice dress! How long _____ you _____ it? --Just 2 weeks.
九年级英语 过去完成时()
九年级英语过去完成时(外研版) 一、初中英语过去完成时 1．Seeing John rush into the room with tears in his eyes, I asked him what . A. would happen B. had happened C. happened D. was happened 【答案】 B 【解析】【分析】所填写动作发生在asked以前，表示过去的过去，用过去完成时，故选B。句意是：看到约翰眼里含着泪水冲进房间，我问他发生什么事了。 【点评】本题考查过去完成时的用法。 2．We are too tired. Please stop __________ a rest. A. to have B. having C. have D. has 【答案】 A 【解析】【分析】句意：我们是在太累了，停下来休息一下吧。stop to have a rest.固定搭配故选A 【点评】注意时态一致， 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．By the time they reached the bus stop, the bus__________ for ten minutes. A. had left B. have left C. had been away D. have been away 【答案】 C 【解析】【分析】句意:到他们到达公交车站的时候，公交车已经离开十分钟了。句中by the time 的意思是到...时候，后跟从句，从句使用的是一般过去时。根据句意可知，从句中
现在完成时和现在完成进行时
现在完成时和现在完成进行时小练习 1. He _____ with his first teacher for quite a long time. A. lost touch B. got in touch C. lost in touch D. has been out of touch 2. Mary _____ Green for five years. A. has married B. has married with C. married D. has been married to 3. It's the third time I ______him this month. A. had seen B. have seen C. saw D. see 4. Tom ________for more than a week. A. has been away B. has gone away C. went away D. has left 5. We _____each other since I left Shanghai. A. haven't seen B. hadn't seen C. didn't see D. wouldn't see 6. He ________with us since he returned last month. A. lives B. lived C. had lived D. has lived 7. They _____here for more than a month. A. have arrived B. have reached C. have come D. have been 8. Comrade Wang ____the Party for about three years. A. has attended B. has joined C. has been in D. has taken part in 9. The book _____on the floor for ten minutes, but no one has picked it up. A. is lying B. has lain C. has been lying D. lay 10. I _______from him so far. A. didn’t hear B. don't hear C. haven't heard D. hadn't heard 11. Great changes ________in my hometown in the past few years. A. were taken place B. have been taken place C. took place D. have taken place 12. ________ the new color film ________this year? A. Has; been shown B. Did; show C. Are; shown D. Will; show 13. ---Why does Mary look to be so sorry? ---Because she _________by her classmates. A. has been laughed B. has laughed at C. was laughed D. has been laughed at 14. For this he _________on twice. A. has operated B. has been operated C. had been operated D. operated 15. I haven’t seen you for quite some time. What ______lately? A. were you doing B. did you do C. have you been doing D. had you done 16. The house looks much bigger now that we _______ the walls in brighter colours. A. are painting B. have painted C. had painted D. have been painting 17. ---How about my food? I _______ here for almost half an hour. ---I’m sorry, sir. It must be ready by now. A. have been sitting B. am sitting C. had been sitting D. was sitting 18. Mary ___________ at this school for thirty years but she hasn’t decided to retire. A. has been taught B. has been teaching C. taught D. had taught 19. I ______ always ______ of him, but I can’t see him. A. had; been thinking B. have; been thinking C. was; thinking D. have; thought 20. Although medical science ______ control over several dangerous diseases, what worries us is that some of them are returning. A. achieved B. has achieved C. will achieve D. is achieving 21. —Is it hard to drive downtown to work? —Yes, that’s why I to work by train. A. have been going B. have gone C. was going D. will have gone
现在完成时
一.表达概念： 1.表示到说话人说话时已经完成的动作，却对现在仍有影响或结果。 例句：He has lost his book.他丢了他的书。 2.表示事情开始与过去，却一直持续到现在还在进行的事情。 例句：He has taught in our school for 30 years. 他在我们学校教书已有30年了。 3.表示从过去某个时间直到现在的这个时间范围内不断重复发生的动作或情况，并且这个不断重复的动作有可能继续下去，也有可能到现在就结束。 例句：My father has always gone to work by bike. 我父亲一向骑车上班。 4.同一般现在时可以表示将来一样，现在完成时也可以在时间状语从句里表示将来。 例句：I’ll wait until he has written his letter. 我愿等到他把信写完。 二、句型构成 主语+have/has+动词的过去分词(p.p）（V-ed） e.g done ①肯定句中：主语+have/has+动词的过去分词(p.p）（V-ed）+宾语. ②否定句中：主语+haven't/hasn't+动词的过去分词（p.p）（V-ed）+宾语. ③一般疑问句中：Have/Has+主语+动词的过去分词（p.p）（V-ed）+宾语. ④特殊疑问句中：特殊疑问词或词组+一般疑问句（have/has+主语+过去分词（V-ed）+其他） 三、时间状语 常与现在完成时连用的时间状语： ever,never,already,yet,just,before,recently,still,lately,since+时间点,for+时间段,etc. 四、注意点
现在完成时及现在完成进行时讲解及练习
现在完成进行时 1 定义:现在完成进行时表示动作从过去某一时间开始，一直延续到现在，可能还要继续下去。 2 现在完成进行时的构成:现在完成进行时是由“have/has+been+动词的现在分词”构成 3 现在完成进行时的基本句型 肯定式I/We have been working. 疑问式Have you been working？ 简略回答Yes，I/we have. No，I/we haven't. 肯定式He/She/It has been working. 疑问式Has he/she/it been working？ 简略回答Yes，he/she/it has. No，he/she/it hasn't. 4 现在完成时的用法 1）在强调指出动作还未结束，还要继续下去。如：I've been reading this book for two hours，but I haven't finished it. 这本书我已读了两个小时了，但我还没读完。 I've read this book.我已读完这本书了。 2）强调动作延续时间的长久或带感情色彩。 She has always been working like that.她一贯是这样工作的。 3）现在完成进行时也可表示现在以前这段时间反复发生的事情。 We've been seeing quite a lot of each other recently.最近我们经常见面。 5 相同点 1. 现在完成时和现在完成进行时都可以表示从过去某一时刻开始一直延续到现在的动作.如: I have worked in this school since 2001. I have been working here since 2001. 2. 现在完成时和现在完成进行时都可以表示一段时间内进行的动作.例如: Mr. Smith has taught English for 20 years. Mr. Smith has been teaching English for 20 years 6 现在完成时和现在完成进行时的区别 1）现在完成进行时更强调动作的延续性,它是现在完成时的强调形式。试比较： We've been living here for ten years. We've lived here for ten years.我们在这儿已经住了十年了。
(完整版)新概念第一册语法讲解：现在完成时
新概念第一册语法讲解：现在完成时 现在完成时 构成：主语+助动词have, has+过去分词 用法： 1）表示过去发生的和现在有某种联系的动作，常和just, usually, already, since等时间副词连用。 I have just had lunch. （饱了，不用再吃了。） He has had a cup of tea.（不渴了，不用再喝。） They have already had their holiday. （不能再度假了。） The boy has already read the book. （已经知道书的内容了，不 用再看了。） 2）询问别人是否做过某事一般用现在完成时： Have you finished your homework? Have you been to Beijing? Have he seen the film? 3）表示开始于过去并持续到现在的动作 I have lived in Beijing for twenty years. I have worked for this school for 1 year. 4）表示一种经历，经验：去过…地方，做过…事情，经历过…事情 I have never had a bath.
I have never seen a film. I have never been to cinema. I have ever been to Paris. Have been to表示去过，have gone to 表示去了 I have been to London.（人已经回来） He has gone to London.（人还在那里） 5）表示一种结果，一般不和时间副词联用 I have lost my pen. I have hurt myself. He has become a teacher. She has broken my heart. 句型变化： ★变疑问句将助动词移到句首，变否定句在助动词后面加not. Have you lost your pen? I have not lost my pen. ★肯定回答及否定回答 Yes, I have. / No, I have not. ★特殊疑问句 What have you done? What has he done? 一般过去时与现在完成时的区别： 凡是有明确的表示过去的时间状语的句子为过去时。
改革开放只有进行时没有完成时讲课稿
改革开放只有进行时没有完成时
精品资料 改革开放只有进行时没有完成时（2012年12月31日） 2015年07月20日13:45 来源：人民网－中国共产党新闻网 改革开放是一项长期的、艰巨的、繁重的事业，必须一代又一代人接力干下去。必须坚持社会主义市场经济的改革方向，坚持对外开放的基本国策，以更大的政治勇气和智慧，不失时机深化重要领域改革，朝着党的十八大指引的改革开放方向奋勇前进。 历史、现实、未来是相通的。历史是过去的现实，现实是未来的历史。要把党的十八大确立的改革开放重大部署落实好，就要认真回顾和深入总结改革开放的历程，更加深刻地认识改革开放的历史必然性，更加自觉地把握改革开放的规律性，更加坚定地肩负起深化改革开放的重大责任。 必须认真总结和运用改革开放的成功经验。第一，改革开放是一场深刻革命，必须坚持正确方向，沿着正确道路推进。在方向问题上，我们头脑必须十分清醒，不断推动社会主义制度自我完善和发展，坚定不移走中国特色社会主义道路。第二，改革开放是前无古人的崭新事业，必须坚持正确的方法论，在不断实践探索中推进。摸着石头过河，是富有中国特色、符合中国国情的改革方法。摸着石头过河就是摸规律，从实践中获得真知。摸着石头过河和加强顶层设计是辩证统一的，推进局部的阶段性改革开放要在加强顶层设计的前提下进行，加强顶层设计要在推进局部的阶段性改革开放的基础上来谋划。要加强宏观思考和顶层设计，更加注重改革的系统性、整体性、协同性，同时也要继续鼓励大胆试验、大胆突破，不断把改革开放引向深入。第三，改革开放是一个系统工程，必须坚持全面改革，在各项改革协同配合中推进。改革开放是一场深刻而全面的社会变革，每一项改革都会对其他改革产生重要影响，每一项改革又都需要其他改革协同配合。要更加注重各项改革的相互促进、良性互动，整体推进，重点突破，形成推进改革开放的强大合力。第四，稳定是改革发展的前提，必须坚持改革发展稳定的统一。只有社会稳定，改革发展才能不 仅供学习与交流，如有侵权请联系网站删除谢谢2
九年级英语过去完成时专项练习
九年级英语过去完成时专项练习 一、初中英语过去完成时 1．By the end of last month, we ______already ______ our lessons. A. has, finished B. have, finished C. had, finished D. will, finish 【答案】 C 【解析】【分析】题意：到上个月末为止，我们已经结束了课程。根据句意，应选C。 【点评】注意时间状语，很容易选出。 2．We are too tired. Please stop __________ a rest. A. to have B. having C. have D. has 【答案】 A 【解析】【分析】句意：我们是在太累了，停下来休息一下吧。stop to have a rest.固定搭配故选A 【点评】注意时态一致， 3．By the end of last month, Jane _____ enough money for the poor sick boy. A. raised B. would raise C. had raised D. has raised 【答案】 C 【解析】【分析】句意：在上个月末，珍已经为贫穷的生病的孩子筹集到了足够的钱。根据By the end of last month，可知句子的时态为过去完成时，C是过去完成时结构，故答案是C。 【点评】考查过去完成时，注意过去完成的时的判定方法。 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 【答案】 D 【解析】【分析】这题考查时态，第一空几个选项都可以，第二空指“我到电影院之前电影已经开始5分钟了”，用过去完成时，又因为begin是短暂动词，不能和一段时间连用，所以选D。 【点评】要注意完成时态中的延续性动词的转换。 5．Yesterday when I _______ to the station, the train ______ already. A. got, had left B. got, has left C. had got, left D. got, left
现在完成时知识讲解
专项语法讲练——现在完成时 【概念引入】 如何学习时态？对中学生来说，最好还是从各个时态的基本概念、基本形式和基本用法学起。在过了这一阶段之后，再放开步伐，通过大量的听、读和笔头实践，获得感性的知识。现在，我们就从最基本的概念、形式和用法等方面来总结一种新的时态——现在完成时。 【用法讲解】 一、现在完成时的定义 现在完成时表示过去发生或已经完成的某一动作对现在造成的影响或结果。 二、现在完成时的构成 1. 肯定句 现在完成时的肯定句式是“have（has）＋过去分词”。 注意：该句式中的have或has是助动词，has用于第三人称单数，其它人称一律用have。 2. 否定句： 现在完成时的否定句式是“haven’t（hasn’t）＋过去分词”。 3. 疑问句： 现在完成时的一般疑问句式是把助动词have或has提到主语之前。回答用Yes, …have(has)./ No, …haven’t(hasn’t). 三、动词过去分词规则变化与不规则变化 (一) 规则变化 变化规则：与动词过去式规则相同。 1. 一般直接在词尾加上ed。look —looked 2. 以e结尾的动词，直接加d。move —moved 3. 以y结尾，y前面是辅音字母的动词，变y 为i，再加ed。carry —carried 4. 部分动词需双写尾字母，加ed。stop —stopped (二)不规则变化 不规则动词的变化因词而异。但是如果对不规则动词的过去式和过去分词做一分析，就可发现其中的“规则”。同学们在记忆时，可按下面的形式对教材后不规则动词表进行分析、整理。例如：AAB型 ABC 型 AAA型
新人教版九年级英语过去完成时整理及习题
过去完成时态 过去完成时的用法： 1、表示一个动作或状态在过去某一时间或动作之前已经发生或完成，即发生在"过去的过去"，这个过去的时间可以用by,before等介词短语或者一个时间状语从句来表示。如： When I woke up,it had stopped raining. When Mr Li got to the classroom, all the students had begun reading. By the time they arrived, the bus had left. 2、表示某一动作或状态在过去某时之前已经开始，一直延续到这一过去的时间。常用表延续的时间状语如by the end of+过去的时间点，by the time+从句等。如: By the end of last year,she had worked in the factory for twenty years. 过去完成时态的构成： 肯定式：had + 动词的过去分词 否定式：hadn't + 动词的过去分词 疑问式：Had … + 动词的过去分词 简略回答: Yes, 主+ had. No, 主+ hadn’t 练一练： 1. He ______ in Shanghai University for four years before he ______ Beijing. A. studied, had gone B. had studied, went C. has studied, goes D. had studied, had gone 1. We __________out by that time that he_________ a thief for a longtime. A. had found, had been B. had found, was C. found, had been D. found, was 2. It so happened that they________ the novel before. A. had read B. would read C. were reading D. read 3．He asked me _____ during the summer holidays. A. where I had been B. where I had gone C. where had I been D. where had I gone 4. What ___ Jane ____ by the time he was sever? A. did, do B. has, done C did, did. D. had, done 5. I ______ 900 English words by the time I was ten。 A. learned B. was learning C. had learned D. learnt 6. By the time my parents reached home yesterday, I _____ the dinner already. A had cooked B. cooked C. have cooked D. was cooked 7. By the time he was ten years old, he _________. A. has completed university B. has completed the university
现在完成时和现在完成进行时的练习题
现在完成时和现在完成进行时的练习题 A. Correct the following sentences. （改错） 1. All these years they are contributing articles to our magazine. 2. I have been drinking five cups of coffee this afternoon. 3. What have you been doing before you left Oxford? 4. It's a good job. Have you done it all by yourself? 5. It's a long time since you come to see me. 6. Alice didn't see much of Henry lately. 7. I'm glad to tell you that you passed the exam. B. Complete the following sentences with the right form of the verbs given. 1. You know, I ________ (look) for a job for three months, and this is my first formal interview. 2. My sister ________ (stay) in Beijing for three months last year. 3. The little boy is dirty all over because he ________ (play) in the mud all the morning. 4. I ________ (wonder) if you were free this afternoon. 5. Here he is! We ________ (wait) anxiously for him since last night. C. Make the best choices. 1. — I’m sure Andrew will win the first prize in the final. — I think so. He ________ for it for months. (2008江苏) A. is preparing B. was preparing C. had been preparing D. has been preparing 2. By the time he realizes he _________ into a trap, it’ll be too late for him to do anything about it. (2008山东) A. walks B. walked C. has walked D. had walked 3. So far this year we _______ a fall in house prices by between 5 and 10 percent. A. saw B. see C. had seen D. have seen 4. Cathy is taking notes of the grammatical rules in class at Sunshine School, where she ______ English for a year. A. studies B. studied C. is studying D. has been studying 5. Danny _________ hard for long to realize his dream and now he is popular. A. works B. is working C. has worked D. had worked 6. —I have got a headache. —No wonder. You_________ in front of that computer too long. A. work B. are working C. have been working D. worked 7. The unemployment rate in this district_______ from 6% to 5% in the past two years. A. has fallen B. had fallen C. is falling D. was falling 8. Now that she is out of job, Lucy ___ going back to school，but she hasn’t decided yet. A. had considered B. has been considering
现在完成时(知识梳理)
现在完成时 【概念引入】 欣赏含有现在完成时的名言： Life has taught me to think, but thinking has not taught me to live. 生活教会了我思考，但思考却没有教会我生活。 Winter must be cold for those with no warm memories. We have already missed the spring. 对于那些没有温馨回忆的人们来说，冬天一定很冷。我们已经错过春天了。 Nature has given us the seeds of knowledge, but not knowledge itself. 在自然赋予我们知识的种子，而非知识本身。 现在完成时的构成： 现在完成时是：助动词have（has）+过去分词构成的。 I have finished my homework. 我已经完成了作业。 现在完成时的否定句：是在助动词have(has)的后面加not构成。 I haven’t seen the film so far. 到目前为止，我还没有看那部电影。 现在完成时的一般疑问句：是把助动词have(has)提到句子主语的前面。 Have you seen the film yet? 你看过那部电影了吗？ 【用法讲解】 一、现在完成时的定义及用法（1） 表示过去发生的某一动作对现在造成的影响或结果。 I have just cleaned my clothes. 我刚洗过衣服。 （“洗衣服”是发生在过去的动作，对现在造成的结果是“衣服干净了”） Have you read that story？你读过那个故事吗？ （“读”这一动作发生在过去，对现在造成的影响是：是否知道故事的内容。） 在学习这一概念的同时，还应注意常与现在完成时连用的几个副词：already，just，ever，yet，never等。already，just多用于肯定句中，ever，yet，never多用于疑问句和否定句中。 I have already finished my homework. 我已经做完家庭作业了。 He has just had his meal. 他刚吃过饭。 Have you ever sung this English song？你曾唱过这首英文歌吗？ They haven’t started yet．他们还没有动身。 We have never heard of it．我们从来没有听说过这件事。 二、现在完成时的定义及用法（2） 表示过去已经开始，持续到现在的动作或状态，也可以表示实质可能继续下去的动作或状态。这时往往与表示一段的时间状语连用。
九年级英语过去完成时教案
2010年中考英语时态复习系列（七）过去完成时过去完成时表示过去某一时间或某一动作之前已经发生或完成的动作，动作发生的时间是"过去的过去"。它是一个相对的时态,只有在和过去某个时间或动作相比较时才会用到. E.g. By the end of the match, they had kicked two goals. We had already had lunch before we arrived there. 其结构是"had+过去分词". 它的否定句是在had后边加not，变一般疑问句是把had提前。 E.g. I had reached the station before 9:00 o'clock. I had not reached the station before 9:00 o'clock. Had you reached the station before 9:00 o'clock? 它通常和before, by the end of 等引导的表示过去的时间状语连用. 另外, 复合句的主句为一般过去时, 宾语从句表达过去发生的动作时,从句也要用过去完成时. E.g. He said he had never seen such an exciting match before. 做题时常见错误如下： 一、had形式易写错 例：He hads (have) gone home when I got to his office. 答案：had 解析：have/has 的过去式都为had, had 在过去完成时中也是助动词, 不能再有单三人称的变化. 二、易与现在完成时弄混 例：He asked what I have (have) said. 答案：had 解析：现在完成时强调对现在的影响或结果．而过去完成时强调对过去的影响或结果．三、易与一般过去时弄混 例：She lived (live) in New York for eight years before he came to China. 答案：had lived 解析：一般过去时表示过去发生的动作或存在的状态。而过去完成时主要体现过去发生的两动作先后有别，即比过去发生的某动作还要“过去”，两动作中先发生的是过去完成时，后发生的则只用一般过去时。
现在完成时与完成进行时for和since练习题
现在完成时练习题 I. 用never, ever, already, yet, for, since填空 1.I have _______ seen him before, so I have no idea about him. 2.Jack has _________ finished his homework ________ an hour ago. 3.Mr. Wang has taught in this school ________ ten years. 4.“Have you ________ seen the film?”“No, I have ________ seen it.” 5.“Has the bus left _______?”“Yes, it has _________ left.” II. 用since和for填空 A. 1) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours 8) _______ an hour ago 9) _______ we were children 10) _____ lunch time 11) ______ she left here B. 1. He has lived in Nanjing ________ the year before last. 2. I’ve known him __________ we were children. 3. Our teacher has studied Japanese _________ three years. 4. She has been away from the city ___________ about ten years. 5. It’s about ten years __________ she left the city. 6. I've been practicing the piano since 10∶30. 7. Mario has been running ____ 15 minutes. 8. Sarah has been sleeping ____ 9∶00. 9. Dale has been talking on the phone ____ five minutes. 10. Louie has been studying Chinese ____ he was six years old. 11. I've been watching you ____ ten minutes. 12. She has done her homework _________ two hours. 13. Tom has been swimming _________ an hour. 14. They have learnd English ________ they came to school. 15. They have been in the room __________8 o’clock. 16. We have studied English _________several years. 17. I have been living in Xi’an_________I was born. 18. She has worked here _________ 2006. 19. Mary has been running _________ she came here. 20. Ann has been learning English since 2003.（选出同义词组）