完成时
什么时候用完成时

什么时候用完成时①表示动作发生在过去某个不确定的时间,但对现在留下了某种影响和结果。
常被just、already、yet等副词修饰。
如:-Have you had lunch yet? -Y es, I have. I've just had it.你(已经)吃午饭了吗?我刚刚吃过。
(现在我不饿了)②表示从过去某一时刻开始一直持续到现在的动作或状态。
这个动作可能刚停止,可能仍然在进行。
常带有for和since等表示一段时间的状语。
如:He has taught here since 1981他自1981年就在这儿教书。
(可能还要继续教)I haven’t seen her for four years.3 现在完成时用法总结⑴与时间状语so far, till now, up to now, for + 一段时间, before, ever, never, recently, just, already, yet 等时间状语的句子中, 谓语常用现在完成时.I have planted fourteen trees so far.Have you ever been to Europe before?I have learned English for three years.She has not yet studied French well.⑵用在特定句型中ⅰThis /It is the first /second…/last time (that) …” that常省略, 表示“这是某人第几次做某事” 常常用完成时态. 如果主句用一般现在时, 从句用现在完成时。
主句用一般过去时, 从句用过去完成时。
It is the third time that I have seen the film.It is my first time that I have been to Shanghai.It was the first time I had seen a fantasy film.ⅱIt is / has been… since…句型中, 主句常用现在完成时,但since从句用一般过去时.It has been three years since she graduated from Beijing University.自她北大毕业以来已经三年了.ⅲThis is one of the most attractive places I’ve been to. 被形容词最高级所修饰的名词后的定语从句中,一般用完成时态。
完成时的四种时态的基本结构

完成时的四种时态的基本结构完成时态是英语中最常用的时态之一,它表示过去某个时间点或时间段已经完成的动作或状态。
完成时态有四种基本结构,分别是现在完成时、过去完成时、将来完成时和完成进行时。
下面将分别介绍这四种时态的基本结构和用法。
一、现在完成时现在完成时的基本结构是“have/has + 过去分词”,其中have用于第一人称单数、第二人称单数和复数,has用于第三人称单数。
现在完成时表示过去发生的动作或状态对现在造成的影响或结果,常用于以下情况:1. 表示过去发生的动作或状态对现在造成的影响或结果,如:I have lost my keys.(我丢了我的钥匙。
)She has been studying English for five years.(她已经学习英语五年了。
)2. 表示过去发生的动作或状态一直持续到现在,如:I have lived in this city for ten years.(我在这个城市住了十年了。
) He has worked for this company since 2010.(他自2010年以来一直在这家公司工作。
)3. 表示过去发生的动作或状态与现在有关联,如:I have just finished my homework.(我刚刚完成了我的作业。
)She has already left for the airport.(她已经去机场了。
)二、过去完成时过去完成时的基本结构是“had + 过去分词”,表示在过去某个时间点或时间段之前已经完成的动作或状态。
过去完成时常用于以下情况:1. 表示过去某个时间点或时间段之前已经完成的动作或状态,如:I had finished my work before he arrived.(他到达之前我已经完成了我的工作。
)She had lived in Paris for two years before she moved to London.(她在搬到伦敦之前在巴黎住了两年。
现在完成时的三种基本用法

现在完成时的三种基本用法
现在完成时是英语中最常用的时态之一,它表示过去发生的动作或状态对现在产生的影响。
现在完成时有三种基本用法,分别是表示经验、表示持续状态和表示完成的动作对现在的影响。
一、表示经验
现在完成时可以用来表示一个人的经验或经历。
例如,“我已经去过巴黎了”表示我曾经去过巴黎,这是我的经验。
这种用法通常和时间状语连用,如“已经”、“曾经”、“从来没有”等。
二、表示持续状态
现在完成时还可以用来表示一个动作或状态从过去一直持续到现在。
例如,“我已经学习英语十年了”表示我从十年前开始学习英语,一直到现在还在学习。
这种用法通常和时间段连用,如“十年”、“三个月”等。
三、表示完成的动作对现在的影响
现在完成时还可以用来表示一个动作已经完成,但对现在产生了影响。
例如,“我已经吃过晚饭了”表示我已经吃完了晚饭,但这个动作对现在的状态有影响,我现在不饿了。
这种用法通常和表示现在状态的词连用,如“饿”、“累”、“渴”等。
现在完成时是英语中非常重要的时态,它可以用来表示经验、持续状态和完成的动作对现在的影响。
在学习英语时,我们需要掌握这三种基本用法,以便更好地运用现在完成时。
完成时态

现在完成时:用法一:持续到现在的动作或状态开始于过去的动作一直持续到现在,而且还可能持续下去(状态、习惯等)。
谓语动词一般为延续性动词(last, continue, know, want, be, work, study, teach, live ……)。
特点:1.动作发生的时间是过去,但这一动作持续到现在,而且还可能继续持续下去。
2.与这种用法的现在完成时态连用的时间状语通常是表示“一段时间”的时间状语,以说明某个动作或状态持续了多久。
(since+时间点,for+时间段,untill now,up till now, so far. In the past few years, over the past few years. during, through centuries, throughout history等)。
用法二:过去发生但与现在仍有联系的动作或状态表示不确定的过去发生的某一动作对现在仍有影响。
谓语动作一般为短暂性的动词。
例句:he has broken his leg 言外之意就是now he is still in hospital,so he can't go out for outing with his classmates.He broke his leg. 单纯表示一种过去的经历,但现在腿已经好了。
使用短暂动词的肯定句不可与“一段时间”的时间状语连用,但否定句表示尚未发生的事情可理解为一种状态,从而可以表示延续。
Eg. I haven't heard from my girlfriend since I came to America. (词句写成肯定句就是错误表达)用法三:表示到目前为止,一段时间内重复发生的动作谓语动词可以使持续的也可以是短暂的。
Eg, I have taken three tests so far this week.(短)For more than eight years, scientists have argued over whether life exists on the planat Mars.(持)其他用法结构表达:This is the third time that I've come to Beijing.This is the most intereting movie that I've ever seen.综述:现在完成时总是与现在有着密切关系:或是表示到现在为止这段时间“一直在持续”或“重复发生”的动作或状态;或是表示“影响现状”的事件。
各种完成时

already; yet; by this time; just; ever; never;
now; before; lately 等。
现在完成时考点
现在完成时与时间状语up to now, so far, up till now等连用。 例如: So far we have finished 9 passages.
将来完成时:will have +动词过去分词 将来完成时表示将来某一时刻之前已经完成的动作。 例如:I’ll have finished my work by this time tomorrow. Before long he will have forgotten all about it. 考点:
完成时:
1、现在完成时:have/has+动词的过去 分词 2、过去完成时:had+动词的过去分词 3、将来完成时:will have+动词的过去 完成时 4.现在完成进行时:will have been doing.
1. 表示动作已经完成,强调过去 发生的某一 动作对现在造成的影响和结果。一般过去 时仅仅说明动作在过去,不强调对现在的 影响。 常与一些时间状语连用:如:
将来完成时与by+将来的时间连用。
Mary will have taken 58 credits by the time she graduates.
练习: 1. I hope they D this road by the time we come back next year. A. have repaired C. are to repair B. will repair D. will have repaired
现在完成时的三种含义

现在完成时的三种含义
现在完成时是英语中的一个时态,表示动作已经完成,但与现在仍有联系。
它可以有以下三种含义:
1. 表示过去完成的动作对现在造成的影响
例如:I have lost my car keys. (我丢了车钥匙)
这句话中,现在完成时表示“我丢了车钥匙”,这个动作已经完成了,但是对现在仍有影响,即我现在找不到车钥匙。
2. 表示从过去到现在发生的一段时间内已完成的动作
例如:I have been studying English for five years. (我已经学英语五年了)
这句话中,现在完成时表示“我已经学英语五年了”,这个动作是从过去一直持续到现在,已经完成了五年。
3. 表示刚刚完成的动作
例如:I have just finished my homework. (我刚做完作业) 这句话中,现在完成时表示“我刚做完作业”,这个动作是刚刚完成,与现在有直接联系。
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现在完成时用法大全

现在完成时用法大全1.现在完成时是表示过去动作对现在造成影响和结果的时态,常用时间状语如many times。
just。
yet。
ever。
never。
already。
so far。
by now等。
另外,现在完成时也可以表示动作或状态从过去开始一直持续到现在,常与so far、for或since等短语连用。
例如,He has been working here since last year.2.现在完成时的构成是have/has+过去分词,例如I have XXX.3.现在完成时的四个基本句型包括肯定句、一般疑问句、否定句和特殊疑问句。
例如,XXX the work。
He has not finished the work。
What has he done?4.在使用现在完成时时,常用的九个词语包括already。
yet。
ever。
never。
just。
before。
so far。
how long和how many times,以及两个词组have/has gone to和have/has been to。
例如,I have already found my pen。
He has gone to Beijing.Jim has been living in this city for two months。
Lucy has been living in Beijing since three years ago。
He has been in China since he arrived here。
If there is no time adverb in the sentence。
the present perfect tense is often used to convey the meaning of "already" in Chinese。
For example。
"Have you lost your library book?" can be translated as "你已经弄丢了从图书馆借的那本书吗?"The present perfect tense is also commonly used in the following sentence patterns: "They have planted many trees in the last few years," "This is the best book I have ever read," and "It is the first time I have played computer games."In the present perfect tense。
英文时态:完成时态

1)我曾经在某个地方见过她。
I have ever seen her somewhere. → 2
2)到目前为止, 该桥尙未竣工。
So far, the bridge hasn't been completed. → 2
3)她刚刚买了一部新自行车。
She has just bought a new bike. → 2
since的四种用法 1)since+过去一个时间点 (如具体的年、月、日期、钟 点、1980,last month,half past six)。 I have been here since 1989. 2)since+一段时间+ago I have been here since five months ago. 3)since+从句 Great changes have taken place since you left. Considerable time has elapsed since we have been here.
⑤Mr. Odds works in a bank and lives on his own. The only family he has is in the next town: his sister lives there with her husband, and her son, Mark. Last week Mr. Odds had a surprise. He drove home from the bank at the usual time, driving neither too slowly nor too fast; he parked his car where he always parked it, out of the way of other cars, and he went inside to make his evening meal. Straight away, there was a knock at the door. Mr. Odds opened the door, to find a policeman standing on the doorstep. “What have I done wrong?” Mr. Odds asked himself. “Have I driven on the wrong side of the road? Has there been some trouble at the bank? Have I forgotten to pay an important bill?” “Hello, Uncle,” said the policeman, “My name’s Mark.” ⑥You should have put the milk into icebox; I expect it undrinkable by now. A.became B.had become C.has become
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过去完成时1)概念:表示过去的过去----|-------|-----|---->其构成是had +过去分词构成。
那时以前那时现在2)用法a.在told, said, knew, heard, thought等动词后的宾语从句。
She said (that) she had never been to Paris.b. 状语从句在过去不同时间发生的两个动作中,发生在先,用过去完成时;发生在后,用一般过去时。
When the police arrived, the thieves had run away.c. 表示意向的动词,如hope, wish, expect, think, intend, mean, suppose等,用过去完成时表示原本…,未能…We had hoped that you would come, but you didn't.3)过去完成时的时间状语before, by, until , when, after, once, as soon as。
He said that he had learned some English before.By the time he was twelve, Edison had began to make a living by himself.Tom was disappointed that most of the guests had left when he arrived at the party.典型例题The students ___ busily when Miss Brown went to get a book she ___ in the office.A. had written, left B,were writing, has left C. had written, had left D. were writing, had left答案D. 把书忘在办公室发生在去取书这一过去的动作之前,因此忘了书这一动作发生在过去的过去,用过去完成时。
句中when表示的是时间的一点,表示在同学们正忙于……这一背景下,when所引导的动作发生。
因此前一句应用过去进行时。
注意:had no … when还没等…… 就……had no sooner… than刚…… 就……He had no sooner bought the car than he sold it.1. 单项选择1.He asked me _____ during the summer holidays.A. where I had beenB. where I had goneC. where had I beenD. where had I gone2. What ____ Jane ____ by the time he was sever?A. did, doB. has, done C did,did. D. had, done3. I ______ 900 English words by the time I was ten。
A. learnedB. was learningC. had learnedD. learnt4. She ______lived here for ______ years.A. had, a fewB. has, severalC. had, a lot ofD. has, a great deal of5. By the time my parents reached home yesterday, I _____ the dinner already.A had cooked B. cooked C. have cooked D. was cooked6. She said she __________ the principle alreadyA .has seen B. saw C. willsee D. had seen7. She said her family _______ themselves ______ the army during the war.A. has hidden, fromB. had hidden, fromC. has hidden, withD. had hidden, with8. By the time he was ten years old, he _________.A. has completed universityB. has completed the universityB. had completed an university D. had completed university9. She had written a number of books ______ the end of last year.A. forB. inC.by D. at10. He _____ to play ____ before he was 11 years old.A had learned, piano B. had learned, the pianoC. has learned, the pianoD. learns ,piano.11. What _______ Annie ____ by the time he was ten?A. did, doB. did, didC. has, doneD. had done12 .He ___ in the factory for three years before he joined the Army.A. has workedB. worksC. had workedD. will work13. By the end of last week, they ____ the bridge.A. has completedB. completedC. will completeD. had completed14. Ben hates playing _____ violin, but he likes playing ____ football.A. a…theB. the… theC. / …theD. the…/15. By the time he was 4, he ______ a lot of German words.A. had learnedB. has learnedC. learnedD. learns16 .Jim turned off the lights and then _____ the classroom.A. was leftB. had leftC. has leftD. left17.They _________ in Guangzhou since 2000.A. livedB. had livedC. have livedD. were living18. The train from Beijing_______ ten minutes ago.A. has arrivedB. was arrivingC. arrivedD. had arrived19. The students _________ their classroom when the visitors arrived.A . have cleaned B. had cleaned C. was cleaned D. have been cleaned20. Fergie_______ the project in one hour.A. have finishedB. will finishC. finishesD. has finished21. The man ________ his coat and went out.A. put onB. had put onC. will put onD. was putting on22 My mother______ in that factory at the age of 18.A. had workedB. has workedC. workedD. works23. Dad ________ while he _______ TV.A .fell asleep…watch B. was falling asleep…watchedC. fell asleep……was watchingD. had fallen asleep…watched2.用动词的适当形式填空1. We _____________ (paint) the house before we ______________ (move) in.2. That rich old man _____________ (make) a will before he _____________ (die).3. They _____________ (study) the map of the country before they ________ (leave).4. The robbers _____________ (run away ) before the policemen _______ (arrive).5. I __________ (turn off) all the lights before I ____________ (go) to bed.6. Paul __________ (go) out with Jane after he __________ (make) a phone call.7. Tom __________ (say) he ___________ (read) the book twice.8. Our plan ____________ (fail ) because we _____________ (make) a bad mistake.9. When the chairman ______________ (finish) speaking, he _____________ (leave)the hall.10.The Reads __ ______ (have) lunch when I ________________(get) to their house.11.When I ______________(arrive) at the station, he ____________________(leave).12..We _______________(learn) about 4000 English words by the end of last term.13. I waited until he _______________(finish) his homework.14. We were surprised at what she ________already ______(do)15.She ____________(not go) to Qingdao because she ________________ (go) there before.16. He ______________(not tell) you the news yet.17. He said he _____________already_________(give) the book to the teacher.18. I ______________(be) to Shanghai before.19. She told me she _________________(be) to Sanya three times.20.She _____________(play) the guitar while her sister_______________(sing).(2)现在完成时可以和带有since或for等表示“一段时间”的状语连用,表示动作或状态从某一时刻开始,一直持续到现在。