瞬间动词的进行式用法
在通常情况下，瞬间动词是不用于进行时态的。但某些特殊场合，瞬间动词也可用于进行时态，其用法主要有以下几种：
一、表示反复或重复
英语中有少数瞬间动词可以用于现在进行时表示不断重复的动作，这类动词主要有ju mp, knock, kick, hit, nod, tap, wink, cough, shoot, drop等。如：
Someone is knocking. 有人敲门。
John is nodding his head. 约翰频频点头。
He is jumping up and down. 他上下地跳着。
Why is she blinking her eyes? 她为什么老眨眼睛?
如果主语为复数，某些动词的现在进行时往往有“不断”或“一个接一个”的含义，如：People are dying in that part of the world. 在那个地方人们不断地死去。
Men are dropping with malaria, dysentery and simple starvation. 士兵们由于疟疾、痢疾或仅仅因为饥饿一个接一个地倒了下去。
二、表示即将发生
注意有些瞬间动词的现在进行时并不表示动作的重复，而是表示动作即将发生。如：Julyan is coming right away. 朱利安马上就来。
She is getting married next December. 她12月结婚。
What time are you leaving? 你什么时候动身?
They’re having a party next week. 下星期他们将开一个晚会。
You’re young people. You ate only beginning to live. 你们是年轻人，刚刚开始生活。
三、表示即将结束
有些瞬间动词的现在进行时则表示动作即将结束，如：
I am finishing. 我快做完了。
It is ceasing to rain. 雨快停了。
The fruit is ripening. 这果子快熟了。
It was my painful duty to tell her that he was dying. 要我把他即将去世的事告诉她，这使我十分为难
瞬间动词转换成持续性动词 瞬间动词用于完成时态不能与一段时间状语连用，须转换成持续性动词。 1.用相应的延续性动词替换的有： buy---have borrow---keep put on----wear catch/get a cold---have a cold come/go/become---be 等。 eg. 1.We have had the TV set for 3years. 2.I have kept the book for 2 weeks. 2.转换成be+名词的有： join the army----be a soldier join the Party----be a Party member go to school----be a student 等。 eg. 1.He has been a soldier for 5 years. 2She has been a student for 2 months. 3.转换成be+adj/adv. die—be dead finish—be over begin---be on leave---be away move----be out of
put on---be on open---be open close---be closed fall asleep------be asleep 等。 eg. He has been dead for 5 years. 4. 转换成be+介词短语 go to school----be in school join the army---be in the army 等。 eg. 1.She has been in the army for 2 years. 2.He has been in school for 9 years. 5.通过去掉短语中的结束性动词 get to know---know begin to study---study come to work----work eg. 1.We have known each other for 10 years. 2.He has study Chinese for 2 years. *瞬间动词完成时的否定式已成为一种可延性状态，因此可以和表示一段的时间状语连用。 eg. 1.I haven’t heard from her for 6 months. 2.I haven’t bought anything for 2 months.
短暂动词当然可以用于进行时态。用什么时态和它是不是短暂动词没有什么关系。英语动词中，有些动词只用为表示状态；但有些动词，有时表示状态，有时又表示动作，遇到这样的动词，就要先分清它是作了状态动词呢，还是作了动作动词。如果是作了状态动词，就不用于进行体。 1、系动词表示状态，是状态动词，不用于进行体。 It is the Mid-autumn Festival today. --Let’s go to the suburbs to enjoy the moon. --It sounds a nice idea. Cui Yongyuan looks good-humoured. be动词也有用于进行体的时候。 2、感觉动词表示状态，是状态动词，不用于进行体。 They saw the plane splashing on the top of the hill. The medicine tastes a little bitter. Don’t you hear me? I’m saying. 常见的还有：feel, keep, notice, smell, etc. 如果表示强调、短暂、一时的状态，也可以用于进行体： The weather is keeping fine these days. I didn’t expect he is being terribly friendly to me. My back is hurting. 3、表示思想活动的动词也是状态动词，不用于进行体。 I know nothing about the market for the festival. I wonder why they have made a decision to go on with the work during the festival. What do you mean? 常见的还有：Admit, agree, appreciate, believe, care, consider, dislike, disbelieve, doubt, expect, find (=consider), forget, guess, imagine, realize, regret, remember, see (understand), suppose, think etc. 如果表示说话人的情感，也会用于进行体： --I am loving the Beijing Opera, aren’t you? --No. Frankly, I am hating it. 4、动词表示愿望、需要时也是一种状态，不用于进行体。 I hope we can have 7 days off over the festival. We all desire health and happiness. What you said requires careful thought. 常见的还有：need, want, wish etc. 5、存在与所属也是一种状态，表示存在与所属的动词也被看作是状态动词，不用于进行体。 He owed his success to luck more than to capacity. The two sides have reached a partial agreement, but several differences still exist between them. 常见的还有：belong to, compare, concern, consist of, depend on, equal, have, include, involve, keep, own, possess, result, stand for etc. 动词have表示所属，但更多的情形是构成短语表示动作，这时，它就可以用于进行体了： He has a good memory. (have在此例中表示possess, owe拥有，是状态)
延续性动词与非延续性动词 动词按其动作发生的方式、发生过程的长短可分为延续性动词与非延续性动词。 一.延续性动词表示能够延续的动作,如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。延续性动词可以与表示时间段的状语连用。 表示时间段的短语有: 1.for+一段时间, eg: for 2 years; for a long time等 2.since从句,since he came here; 3.since+时间点+ago,eg：since last year, since 5 days ago; 4. how long; 二.非延续性动词也称终止性动词、瞬间动词,表示不能延续的动作,这种动作发生后立即结束。如:open, die, close, begin, finish, come, go, move, borrow, lend, buy等。 如果要与for+ 时间段，since+年份，since+时间段+ago，how long连用时，瞬间性动词要变延续性动词。 三.延续性动词与非延续性动词之间的转换：
例：（1）他死了三年了。 误：He has died for three years. 正：He has been dead for three years. 正：He died three years ago. 正：It is three years since he died. 正：Three years has passed since he died. (2) 他来这儿五天了。 误：He has come here for five days. 正：He has been here for five days. 正：He came here five days ago. 正：It is five days since he came here. 正：Five days has passed since he came here. (1)、(2)句中的die、come为终止性动词，不能与表示"段时间"的状语连用。那么，应如何正确表达呢？可以采用下面的四种方法： (1)将句中终止性动词转换为相应的延续性动词, 如上面两例中的第一种正确表达方式. (2)将句中表示"段时间"的状语改为表示过去确定时间的状语，如下面两例中的第二种正确表达 方式。 (3)用句型"It is+段时间+since..."表达原意，如上面两例中的第三种正确表达方式。 (4)用句型"时间+has passed+since..."表达原意，如上面两例中的第四种正确表达方式。 四、终止性动词可用于现在完成时否定式中，成为可以延续的状态，因而可与表示一段时间的 状语连用。 如:1.He hasn't left here since 1986. 2.I haven't heard from my father for two weeks. 五、终止性动词的否定式与until/till连用，构成"not+终止性动词+until/till ..."的句型，意为"
初中英语动词ing用法小结 [导读]动词finish,mind,enjoy,practise,keep等后接动词，要用动名词形式作宾语。 在英语教学中，我发现考 动词-ing形式的题目很多。根据多年教学经验，现在把初中阶 段-i n g 的情况总：一、一些动词后要接动名词作宾语 1.Everyoneenjoys____(watch)TVintheevening. 2.Pleasefinish____(draw)thepictureafterschool. 3.Thestudentspractise____(read)Englisheverymorning. 【解析】动词finish,mind,enjoy,practise,keep,miss,hate,consider,continue, Imagine,suggest,advise等后接动词，要用动名词形式作宾语。答案是：watching；drawing；reading. 二、一些介词后面要加动名词作宾语 1.Heisgoodat____(write). 2.Wearelookingforwardto____(see)you. 3.Theyareinterestedin____(listen)tomusic. 4.Youcandrinkalotofwaterwithout____(get)fat. 【解析】介词后跟动词，要用动名词形式作其宾语。如下列结构中的介词：thanksfor doingsth,thinkaboutdoing,begoodatdoingsth,dowellindoingsth,succeedin doing,How/Whataboutdoingsth?,insteadofdoingsth,keepsbfromdoingsth,stopsb fromdoingsth,lookforwardtodoingsth,beusedto（习惯于 ）doingsth,devotetodoing sth,payattentiontodoing,preferdoingtodoing,makeacontribution(贡献 )todoingsth 答案是：writing;seeing;listening;getting. 三、一些固定结构要加动词的ing形式 1.Hespendshalfanhour____(do)hishomeworkeveryday. 2.Theyarebusy____(prepare)forthecomingtest. 3.Wehaveagreattime____(talk)toeachtimeatlunchtime. 【解析】在一些固定结构中要求使用动词-ing形式。 如：havesomeproblems(difficulty,trouble)doingsth,spend?doingsth,bebusy doing,havefundoingsth,haveagreattimedoingsth,,preventsbfromdoingsth,feel likedoing,giveupdoing,findsbdoing,can’thelpdoing,putoffdoing,keepondoing,be
初中英语点动词和延续性动词练习题 初中英语点动词和延续性动词练习题初中英语点动词和延续性动词练习题 w 初中英语点动词和延续性动词练习题 1) He got to Beijing five minutes ago He ________ _________ _________ Beijing for _________ _________ 2) I moved to the USA last year I ________ ________ __________ the USA since __________ __________ 3) I went home yesterday I _______ ________ _________ home for _________ __________ 4) They came here last week They _________ _________ here since _________ __________ 5) He came out two years ago He _________ __________ _________ for __________ __________ 6) We return to Fuzhou yesterday We ________ ________ _________ to Fuzhou since __________ 7) I became a teacher in 2000 I ________ __________ a teacher for _________ _________ 8) The river became dirty last year The river _________ _________ dirty for _________ __________ 9) The shop closed two hours ago The shop ________ _________ _________ for _________ _________
[导读] 动词finish, mind, enjoy, practise, keep等后接动词，要用动名词形式作宾语。 在英语教学中，我发现考动词-ing 形式的题目很多。根据多年教学经验，现在把初中阶段容易考-ing的情况总结如下： 一、一些动词后要接动名词作宾语 1. Everyone enjoys____(watch) TV in the evening. 2. Please finish____(draw)the picture after school. 3. The students practise____(read) English every morning. 【解析】动词finish, mind, enjoy, practise, keep, miss, hate, consider, continue , Imagine, suggest, advise等后接动词，要用动名词形式作宾语。答案是：watching；drawing；reading. 二、一些介词后面要加动名词作宾语 1. He is good at ____(write). 2. We are looking forward to____(see)you. 3. They are interested in____(listen)to music. 4. You can drink a lot of water without____(get) fat. 【解析】介词后跟动词，要用动名词形式作其宾语。如下列结构中的介词：thanks for doing sth, think about doing, be good at doing sth, do well in doing sth, succeed in doing , How/What about doing sth?, instead of doing sth, keep sb from doing sth, stop sb from doing sth, look forward to doing sth, be used to（习惯于）doing sth, devote to doing sth, pay attention to doing, prefer doing to doing, make a contribution (贡献)to doing sth 答案是：writing; seeing; listening;getting. 三、一些固定结构要加动词的ing形式 1. He spends half an hour____(do)his homework every day. 2. They are busy____(prepare)for the coming test. 3. We have a great time____(talk)to each time at lunchtime. 【解析】在一些固定结构中要求使用动词-ing形式。
瞬间动词与延续性动词 “瞬间动词”又叫终止性动词、点动词，表示动作有一个终点，到了终点就不能再延续。因此在现在完成时的句子中，瞬间动词不能直接与for/since 连用，需要转换成“延续性动词”。常用的请见5BP17表格。 Exercises 一、改错：横线划出错误的部分，并在后面的横线上改正。 1. How long have you begun to study English? ________________________ 2. I have borrowed this book for two weeks. ________________________ 3. The river has become very dirty since last August.___________________ 4. Our manager is away today. He has been to Guangzhou on business. ___________________________ 5. He has gone out for two years. ________________________ 二、选择 （）1. Her grandfather ______ for two years. A. died B. has died C. has been dead D. has been died （）2. It's six weeks ______ I met you last. A. when B. since C. before D. for （）3. Have you met Mr. Li ______？ Ａ. just Ｂ. ago Ｃ.before Ｄ. a moment ago （）4. We ______ Xiao Li since she was a little girl. Ａ. know Ｂ. had known Ｃ. have known Ｄ. knew
动词-ing形式小结 动词-ing形式概述 v.-ing 形式包括传统语法的现在分词和动名词两部分，像动词不定式一样，它既具有动词时态和语态的特征，又具有名词、形容词和副词的特征，它可以在句中作主语、表语、定语、宾语、状语、宾语补足语、主语补足语等。 动词-ing形式的时态、语态 主动语态被动语态 一般式 writing being written 完成式 having written having been written 否定式 not writing v.-ing形式的一般式 V.-ing形式的一般式的构成，表示动作发生在谓语动词动作的同时、之前或之后。 用来泛指动作，没有时间的区分。 Seeking after knowledge is human nature． 求知是人的本性。 Travelling abroad can widen one’s outlook． 出国旅游会扩大人们的视野。 Eating too much chocolate is bad for your teeth． 吃太多的巧克力对你的牙齿有害。 My favourite sport is playing table tennis． 我最喜欢的运动是打乒乓球。 行为与主要动作同时发生，表示伴随。 The students came into the classroom laughing and talking． 学生们又说又笑地走进了教室。 As she saw me，she came over smiling． 她看到我时，笑容可掬地走过来。 Doing the washing up，Connie was planning her holiday． 康妮在洗碗的时刻盘算着怎样度假。 行为在主要动作之前或之后。 Antonio remembered sending his mother an email three times last month． 安东尼记得上个月给他母亲发了三次电子邮件．(在前) Mr. Lee went out shutting the door behind him． 李先生出去后将门随手关上。(在后) v.-ing形式的完成式 v.-ing形式的完成式由“having + v.-ed 形式”构成，表示动作发生在谓语动词表示的动作之前。 Having finished his homework，he went to bed． 做完了作业，他去睡觉了。(先“做作业”，后“去睡觉”) He doesn’t remember having promised me that． 他忘记了曾经答应过我那件事。 She regretted having missed the film． 她很后悔没看这部电影。 I remember having heard you speak on that subject． 我记得曾经听见你谈过这个问题。 I could not recall having heard anyone say that before。 我不记得以前听过谁说这样的话。
延续性动词和短暂性动词转换归纳 瞬间动词可以用于现在完成时，但不能和表示一段时间的状语连用如:for 和since 所引导的时间状语都表示一段时间.那就要将瞬间动词转化为表延续的动词或者表状态的be+名词／形容词或副词／介词短语等。 leave—been away from buy—have borrow—keep die—be dead get up—be up put on—be on / wear come / get back—be back go to town—be in town lose—be missing catch a cold—have a cold close—be closed / not open open —be open fall ill / asleep— be ill / asleep begin /start—be on return--be back marry---be married finish--be over become--be come / go to —be in / at arrive in （at）/ get to / reach——be in / at join + 名词-------be in + 组织/ be a（an）+组织成员get /receive a letter from—have a letter from
一看时间状语。如果句中没有表示过去确切时间的状语，常用现在完成时；如果有，则只能用一般过去时。如： I have visited the factory. I visited the factory last year. 二看句首有无疑问词。如果笼统地问人家做过某事了吗（句首无疑问词），常用现在完成时；但进一步询问何时、何地、何原因、用什么方式做那事时（句首有疑问词）就要用一般过去时。如：－Have you had your breakfast? －Yes, I have. －When did you have it? －At seven thirty. 注意：这种用法是以连贯性问答为背景的。否则就需要具体情况具体分析。如： How many words have you learned by heart? How did you learn them by heart? 三看句中谓语动词是否为延续性动词。如果表示的动作或状态一直延续到现在，最好选用延续性动词，并使用现在完成时；如果是瞬间动词，则用一般过去时。如： He has been a league member for two months. He joined the Youth League two months ago.
［导读］动词finish, mind, enjoy, practise, keep 等后接动词，要用动名词形式作宾语。 在英语教学中，我发现考动词-ing形式的题目很多。根据多年教学经验，现在把初中 阶段容易考-ing的情况总结如下： 一、一些动词后要接动名词作宾语 1. Everyone enjoys __ (watch) TV in the evening. 2. Please finish ___ (draw)the picture after school. 3. The stude nts practise __ (read) En glish every morning. 【解析】动词finish, mind, enjoy, practise, keep, miss, hate, consider, continue , Imagine, suggest, advise 等后接动词，要用动名词形式作宾语。答案是：watching ；drawing ；reading. 二、一些介词后面要加动名词作宾语 1. He is good at ___ (write). 2. We are look ing forward to _ (see)you. 3. They are in terested in _ (liste n)to music. 4. You can drink a lot of water without __ (get) fat. 【解析】介词后跟动词，要用动名词形式作其宾语。如下列结构中的介词：tha nks for doing sth, think about doing, be good at doing sth, do well in doing sth, succeed in doing , How/What about doing sth?, in stead of doing sth, keep sb from doing sth, stop sb from doing sth, look forward to doing sth, be used to (习惯于)doing sth, devote to doing sth, pay attention to doing, prefer doing to doing, make a contribution (贡献)to doing sth 答案是：writing; seeing; listening;getting. 三、一些固定结构要加动词的ing形式 1. He spe nds half an hour __ (do)his homework every day. 2. They are busy (prepare)for the coming test.
点动词与持续动词 点动词 就是瞬间性动词，终止性动词，瞬间动词，非延续性动词，只是叫法不同。由于这类动词所表示的动作发生与结束在一瞬间完成，所以点动词的完成体的肯定式既不能与表示一段时间的状语for＋时间段或 since＋ 时间点连用，也不能用在how long引导的特殊疑问句之中。常见的点动词有：leave，go，come ，arrive ，begin，buy，borrow，die，join，become 等瞬间动词又叫做结束性动词 瞬间动词，也叫终止性、结束性动词。表示动作的结果，或表示短暂性、一次性的动作。如：close, leave, buy, join, become, begin, fall(掉下)，fall ill(病倒)，get to(know), come, go, see, hear, hear from, catch a cold等。这类动词可以用于完成时，但在一般情况下，不能加上表示一段时间的状语或疑问词， 但是在否定句中，瞬间动词也可以和表示一段时间的状语、连词连用，它的含义是好长时间没进行这个动作了，没进行此动作的状态就可以延续。如： I haven't heard from my parents for a long time. 我有好长时间没收到父母来信了。 He hasn't left home for a week. 他有一个星期没出门了 误区 [ 一] 瞬间动词的完成时误区之一是：现在完成时表达的是“从前发生的动作”，“延续到现在”。而瞬间动词一瞬间便完成了从发生到结束的全过程，能有完成时吗？现在完成时虽然动作“发生在过去”但其“影响”持续到现在。因整个存在的时间短，所以其完成时不与表达“段”的时间连用。 [ 二] 瞬间动词的进行时误区二： leave, come 等终结性动词，没有进行时的形式。例如 come这一个词，（尤其在肯定句中，可参见第四点）不与表达段的时间状语连用。比如我们不说： He has come for days.
一、现在完成时的谓语动词如果是短暂性动词，通常不能与表示一段时间的短语及短语（或从句）等连用。应将短暂性动词改为相应的延续性动词。如： 1、This factory opened twenty years ago. This factory has been open for twenty years. 2、Miss Gao left an hour ago. Miss Gao has been away for an hour.
3、Her teacher has been a Party member for 3 years. Her teacher joined the Party 3 years ago. 4、The film began two minutes ago. The film has been on since two minutes ago. 5、He bought the bike two years ago. He has had the bike for two years. 6、The old man died ten years ago. The old man has been dead for ten years. 7、He came back 3 days ago. He has been back for 3 days. 8、I left my hometown 10 years ago. I have been away from my hometown for 10 years. 9、They got married 13 year ago. They have been married for 13 years. 10、I borrowed the book a week ago. I have kept the book for a week. How long have you kept the book? 注：在否定句中，短暂性动词可以和表示一段时间的状语连用。 I haven’t borrowed the book for a long time. 我好长时间没有借过这一本书了。
1、-ing分词的构成 -ing分词是由动词原形加词尾-ing构成。-ing分词同样有时态和语态的变化，通常有下表几种形式（以do为例）： 一般式完成式 主动形式 doing 主动形式 having done 被动形式 being done 被动形式 having been done -ing分词的否定形式是由not 加-ing分词构成。如： Not knowing his address, I could do nothing but stay at home and wait. 不知道他的地址，我只好在家里等着。 His not coming made all of us angry. 他没来使我们大家都很生气。 2. -ing分词的一般式和完成式： -ing分词的一般式表示和谓语动词所表示的动作同时进行的动作；完成式表示在谓语动词所表示的动作之前发生的动作。如： Being a student, he was interested in books. 作为一个学生，他对书本很感兴趣。 Not having studied his lessons very hard, he failed the examinations. 因为没有努力学习功课，他考试不及格。 3. -ing分词的被动式： -ing分词的被动式表示它的逻辑主语是-ing分词动作的承受者。根据-ing分词动作发生的时间，-ing分词的被动式有一般被动式(being done)和完成被动式(having been done)。如： The question being discussed is very important. 正在被讨论的问题很重要。 Having been criticized by the teacher, he gave up smoking. 被老师批评以后，他把烟戒了。 注意：在need, want, require, be worth等动词(短语)后，作宾语的-ing分词常用主动形式来表示被动含义。如： Your shoes need cleaning. = Your shoes need to be cleaned. 你的鞋需要清洗一下了。
终止性动词与延续性动词之间的转换 终止性动词(也可称为非延续性动词,瞬间动词,点动词或短暂性动词),如begin,start,die,buy,leave, come等,表示动作的发生与结束于一瞬间完成,不能再延续,所以它的现在完成时不能和表示延续的时间状语连用, 即不能与表示一段时间的状语,for+时间段, since+时间点/从句连用,也不能用在how long引导的特殊疑问句中. 终止性动词要表示持续时, 可用以下方法: ⑴.将时间状语改为时间段+ ago,句中谓语动词用一般过去时. eg.我弟弟参军两年了. My brother joined the army two years ago. ⑵.若保留for+时间段,since+时间点/从句, 或用在how long 句型中,则需将终止性动词改为相应的状态动词或延续性动词 The film started two hours ago．→The film has been on for two hours． 常见短暂性动词与延续性动词的转换 Ⅰ. be 型 1. go there -- be there https://www.doczj.com/doc/0a6628359.html,e here—be here https://www.doczj.com/doc/0a6628359.html,e back—be back 4.die—be dead 5.leave—be away(from) 6.open—be open 7.close—be closed 8.go/get out—be out 9.finish/end-- be over 10.become—be 11.get up—be up 12.begin/start(上演)—be on 13. fall asleep-- be asleep 14.fall ill – be ill 15. move here/there --be here/there 16. get to… --be at/in 17.arrive at / in… -- be at / in 18.reach…-- be at/in 19.get married --be married 20.join—be in/be a member of join the Party-- be in the Party / be a Party member/ be a member of the Party Ⅱ. 实义动词型 1.borrow-- keep 2. buy——have 3.Begin to teach—teach 4. get to know—know 5.Put on—wear 6. receive--have 7.catch a cold—have a cold 8.hear from—have a letter from ［注意点］ 1．上述例词除borrow／buy／catch需转换为keep ／have外，其余均为“be＋adj．／adv．／n．”结构。2．非延续性动词并非不可用于现在完成时态中，只是不能和表示“一段”时间的短语连用，但可与just，yet，already ，ever，never等连用。例如： They have already come． He has just gone out．
现在完成式中瞬间性动词如何变为延续性动词。 在完成式中，一个瞬间性动词（一次性动作如buy, borrow,die,leave,begin,join等）不能与 表示一段时间的状语（for, since, how long等）连用，此时须将该瞬间动词改为延续性动词或状态动词. 女口：He borrowed a book two days ago.（用现在完成式表达） He has kept the book for two days. 他持有这本书两年了。 1、 _______________________________________________________________ 他三年前买了一辆车。 2、 _______________________________________________________________ 他两年前参了军。 答案：1、He has had a car for three years或He has bought a car.或He bought a car three years ago. 2、He has been in the army for two years或He has joined the army. He joined the army two years ago. 切记：有些动词是非延续的，在此用法中要换成其相对应的延续性动词： His father has died. His father has been dead for three years. 他父亲已经去世三年了。 She has joined the Party/League. She has been in the Party/ League for two months.=She has been a Party/ League member for two mon ths.
最佳答案 since+时间点 for+时间段 eg:He has kept the book for two weeks. He borrowed the book since two weeks ago. 注意动词的时态，for后面是一段时间，动词用完成式，而since后面是一个时间点，动词用过去式。两周前的一天，与for two weeks 的两个星期这样14天相比是一个点。 一、延续性动词 延续性动词表示的动作不但可以延续，而且可以产生持久的影响。常见的这类动词有：be，have，keep，know，learn，lie，live，read，sing，sleep，stand，stay，wait，walk，watch等。延续性动词的用法很广，但常见于现在完成时中的句子中，且常与for，how，long，since等引导的表示一段时间的状语或状语从句连用。例如： 1．I have learned more than 1，000 Chinese words since I came to China． 自从来到中国，我已经学会了l，000多个汉字。 2．We have lived in Linqing since we came here．自从来到这儿，我们就一直住在临清。
3．I have kept the picture for about three years．这张画我保存了大约三年。 二、终止性动词 终止性动词又称为瞬间动词或非延续性动词，它表示的动作不能延续，也就是说动作一旦发生就立即结束，并产生某种结果。常见的这类动词有：accept，arrive，become，begin，borrow，break，buy，catch，close，come，die，end，fall，finish，get，give，go，join，leave，put，reach，receive，shut，start，stop等。终止性动词用在现在完成时要注意下面三点： （一）终止性动词可直接用来表示某一动作的完成。例如：1．They have reached Shanghai．他们已经到达了上海。2．Has he gone to London? 他已经到伦敦去了吗? （二）终止性动词表示的动作极其短暂，不能持续，所以，在现在完成时中一般不能和以since，for等引导的表示一段时间的状语连用。例如： 1．那老人已经死了一周了。The old man has died for a week．(误) 2．他三天前就已经来这儿了。He has come here since three days ago．(误) 在以上两句中，die和come都是终止性动词，可用于现在完成时，但不能与以