时态

时态
时态

Ms Lee ________a good rest last night and she felt better this morning.()

A.has

B.had

C.is having

D.will have

31.She ________ when I saw her yesterday morning.()

A.run

B.ran

C.was running

D.has run

32.Jeremy Hao Lin ________ in NBA since 2010.()

A.play

B.played

C.will play

D.has played

31.—Is your brother in Beijing?()

—No.He________to London for the Olympics.

A.went

B.has gone

C.has been

D.will go

32.The plane________after the heavy rain stopped.()

A.takes off

B.took off

C.will take off

D.has taken off

28.He ________too much, so he didn’t feel well.()

A.ate

B.eats

C.will eat

D.is eating

29.You can find Tom in the classroom.He ________ the window.()

A.is cleaning

B.was cleaning

C.cleaned

D.cleans

31.Bill’s uncle ________ in Beijing since last year.()

A.work

B.worked

C.has worked

D.will work

32.I ________ my clothes this time yesterday.()

A.wash

B.washed

C.am washing

D.was washing

27.Mike went boating with his friends last weekend. They ________ a good time.()

A.have

B.had

C.will have

D.is having

28.Tony, be quiet, please! Your dad ________ on the phone.()

A.talked

B.was talking

C.is talking

D.talks

30.Our team ________ every match since April, but we still have three more games to play.()

A.has won

B.will won

C.win

D.won

31.When I went to say goodbye to Ann, she ________ the piano.()

A.plays

B.played

C.has played

D.was playing

29.—Oh, I left my dictionary in your house.()

—Don’t worry.I ________ it to school tomorrow.

A.will take

B.take

C.took

D.was taking

30.—Your hat looks really nice.()

—I ________ it in a small shop last week.

A.bought

B.have bought

C.will buy

D.buy

31.—Look! The light is still on in our teacher’s office.()

—Probably she ________ her work yet.

A.doesn’t finish

B.didn’t finish

C.hasn’t finished

D.won’t finish

28.—Who________us a speech next week?()

—Dr.Smith, a famous scientist.

A.give

B.gave

C.gives

D.will give

29.—Have you seen my dictionary?()

—Yes.I________it on your desk five minutes ago.

A.see

B.saw

C.sees

D.will see

31.Rose ________ English since 2002.She’s got a lot of teaching experience.()

A.has taught

B.will teach

C.teaches

D.taught

32.Mr.Green ________ his lessons when I went into his office.()

A.prepares

B.prepared

C.is preparing

D.was preparing

30.Our manager ________a long way home yesterday and it made him very tired.()

A.drives

B.will drive

C.drove

D.is driving

31.Mrs.White came to our school in 1996.She ________here for nearly 16 years.()

A.has worked

B.works

C.will work

D.worked

32.We ________trees if it is sunny next Sunday.()

A.plant

B.planted

C.have planted

D.will plant

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How often does the shuttle bus run? 2) 在时间和条件状语从句中常使用一般现在时表示将来发生的事情:When Bill comes (不用will come), ask him to wait for me. I shall go there tomorrow unless I’m too busy. 二、一般过去时 标志:动词过去式 期末英语必考八大时态结构及用法详解,初一、初二、初三均适用! *闭音节:元音字母a, e, i, o, u如果发字母本来的音则称为开音节,否则称为闭音节。 1. 表示过去某时所发生的动作或存在的状态,常与表示过去的时间状语连用(e.g. yesterday, this morning, just now, a moment ago, in May, last night / year / week, once upon a time, the other day, before …, when…, in the past等)。如: Jim rang you just now. Liu Ying was in America last year. 2. 表示过去经常或反复发生的动作,特别是used to do表达的句型,本身表示的就是过去常常。如: When I was a kid, I often played football in the street. She used to visit her mother once a week.

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时态用法归纳Mar 2, 2011 第一部分重点时态 1. 过去时与过去进行时 2. 过去时与现在完成时 3. 过去时与过去完成时 4. 进行时态表暂时性情况 5. 一般时态表将来 一. “一般过去时” 与“过去进行时” 一般过去时:指过去做完了某事,有结果。 过去进行时:指当时正做某事, 不知结果或不谈论结果。 1) We built a dam last winter. 大坝 We were building a dam last winter. 2) I was using my phone when the teacher came in. 3) My brother fell while he was riding his bicycle and hurt himself. (NMET 89) 4) I don’t think Jim saw me; he was just staring into space. (NMET 95) Practice: 1) --- Has Sam finished his homework today? --- I have no idea. He _____ it this morning. (2004四川高考) A. did B. was doing (B ) 2) ---- What’s wrong with your coat? ---- Just now when I wanted to get off the bus, the man next to me _____ on it. (2005重庆) A. was sitting B. sat (A) 进一步练习: 1.I first ______ (meet) Lisa three years ago. She ______ (work) at a radio shop at the time. (NMET 97) (met; was working ) 2.“Sorry to have interrupted you. Please go on.” “Where was I?” “You _________ (say ) you didn’t like your father’s job.” (2004年春招) (were saying ) 3. “You were out when I dropped in at your home.” “Oh, I ___________ (wait ) for a friend from England at the airport.” (2004广东) (was waiting) 4. Mary _____ __ (make ) a dress when she cut her finger. (NMET91 ) (was making ) 5. My mind wasn’t on what he was saying so I’m afraid I _____ (miss) half of it. (2004河北卷) (missed ) 6. ---You look very tired. _______ at all last night? --- No, not really. I’m tired out now. (2006陕西) A. Did you sleep B. Were you sleeping (A )

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一般现在时态与一般过去时态结构及用法 1 一般现在时 标志:动词原形 1. 表示经常性或习惯性动作,常与表频度的时间状语连用: She often speaks English. I leave home for school at 7 every morning. 2. 表示现在的状态、特征、职业、能力、感觉等: He seems to feel a bit down today. He works as a driver. 3. 表示真理、客观存在、科学事实或用于格言警句中:Shanghai lies in the east of China. Columbus proved that the earth is round. Where there is a will, there is a way.

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一般现在时 一、概念: 1)经常性、习惯性的动作或存在的状态。 标志词或短语(带有表示频率的时间状语):always , everyday , often , once a week (month , year , etc。) ,never, sometimes , seldom , usuall y等等She only write to her family once a month.她一个月只给家里写一封。 I go to work by bike every day。我每天骑自行车上班。 2)表示主语的特征、性格、能力、爱好等。 . He can swim. I work hard. I like watching TV. 3)表示客观真理 . There are seven days in a week. The sun rises in the east 。日出东方。 Ten minus two is eight。十减二等于八。 Light travels faster than sound 。光的速度比声音的速度快。 The United States lies by the west coast of the Pacific Ocean. 美国位于太平洋西岸。 4) 根据英文语法规定,当主句的谓语动词是一般将来时,那么时间或条件状语从句的谓语动词只能用一般现在时来表示将来要发生的动作。主句表将来,从句要用一般现在时。 例:I'll tell him the news when he comes back. 他回来时,我将告诉他这个消息。 If you take the job , they will talk with you in greater details。 如果你接受这份工作,他们将和你谈谈细节。 二、句式结构: 1)主语 + be动词 + 其他 2)主语 + 行为动词 + 其他 三、句式转换 1)be 动词的一般现在时的句式转换: 肯定句:主语+be+表语(n., adj.等)

(完整版)各种时态结构的总结

各种时态结构的总结 各种时态的主动结构: 一般现在时(表习惯性,经常性,反复性): 1.主语+am/is/are+其他 2.三单主语+动词-s/-es形式+其他 3.非三单主语+实义动词原形+其他 一般过去时(表动作发生在过去): 1.主语+was/were+其他 2.主语+实义动词过去式+其他 一般将来时(表动作发生在将来): 1.am/is/are going to+动词原形 2.will/shall+动词原形 过去将来时(表动作发生在过去的将来): 1.was/were going to +动词原形 2.Would+动词原形 现在进行时(表动作现在或目前正在发生):am/is/are +动词-ing 过去进行时(表动作过去某一时间正在发生):was/were+动词-ing 现在完成时(表动作发生在过去,对现在造成的影响或结果;或者动作持续到现在或将来): has/have+动词过去分词(have/has done)(三单主语用has,其他人称用have) 过去完成时:(表过去某个动作之前的那个动作,即过去的过去)had+

动词过去分词(had done) 各种时态的被动结构:(done指过去分词)一般现在时:am/is/are done 一般过去时:was/were done 一般将来时:1,shall/will be done 2, am/is/are going to be done 过去将来时:1,would be done 2, was/were going to be done 现在进行时:am/is/are being done 过去进行时:was/were being done 现在完成时:have/has been done 过去完成时:had been done 含情态动词的被动结构:情态动词+be done 不定式的被动结构:“to be done”。

英语语法基本基础知识——时态

英语的时态问题 英语的时态可以分为:“时”(time) 和“体”(aspect)(又称为态)。时是指动作发生的时间,体是指动作发生时的状态。时间与体就象是坐标里的横轴和纵轴,它们的结合交织出了瞬息万变的时空,也构成了英语动词的时态问题。 时间分为:过去,现在,将来,过去将来 体分为:一般(在某个时间点), 进行(延续某个时间段), 完成(完成某个时间段) 完成进行(延续某个完成的时间段) 如此以来,英语中就有16种时态变化,现在就用动词为write例,看看它们的形式。 注意:里面的斜体字部分,由于时态过于复杂,几乎没有人真正去应用它们,可以忽略不记。 下面就常用的12种时态,(其中还有三种相对用的较少的,请注意)。具体分析一下。 一.一般现在时 表示现在的时间“点”上发生的动作或者状态,常用于以下的情况 1、经常重复发生的动作或存在的状态,多与often, always, usually, sometimes, everyday, 等时 间状语连用。 He takes a walk after supper everyday My mother and father work at the same company. 2、表示性格,特征,能力。 Mr. Smith hates fish and never eats any. 3、表示客观真理或者普遍事实。

The sun rises in the east. 二.一般过去时 表示过去某时发生的动作或者状态,常和表示过去某个时间“点”的时间状语(yesterday, last week, 3 years ago, in 1987)连用 She bought a car last week. He came to help me at that time. 三.一般将来时 表示将来的时间“点”上发生的动作或者状态。 The train will arrive soon. We shall know the news tomorrow. 四.过去将来时 过去某个时间“点”上将要发生的动作或状态。 I asked her where she would spend her holiday. I told my father that I should go home next Monday. 五.现在进行时 表示现在的时间“段”上正在延续进行的动作或者状态。 I’m doing some washing. What are you doing? 六.过去进行时 在过去某一个时间“段”正在延续进行的动作。 I was working in my office at eight o’clock yesterday evening. He was making a phone call when I saw him. 七.将来进行时 在将来某个时间“段”正在发生的动作,一般表示一种猜测和未来的计划,一般不太常用。What will you be doing at 3 o’clock tomorrow afternoon? (明天下午三点你将在做什么哪) 八.现在完成时 表示动作在一个时间“段”的完成,而且这个时间段是从过去某一点延续到现在的。经常跟时间状语since 1987,for 10 hours , by the last year相连。 My brother has been ill for 3 days. I have not seen her since 1991. 九.过去完成时 在过去的某个时间“段”里动作的完成,从过去的一点再到过去的另一点。或者称为过去的过去。 He said that he had written her a letter. Helen rang me up after I had gone to sleep.

种英语时态的用法

本专题为大家讲解了16种英语时态的用法,为大家总结了英语时态表,方便同学们更好的英语时态的结构. 英语的基本时态由三种“时”(时间),四种“态”(状态)交叉构成。 三种“时”:过去现在将来 四种“态”:常态进行态完成态完成进行态 一般时进行 时完成时完成进行时 现在 study be studying have studied have been studying 过去 studied be studying had studied had been studying 将来 will study wil be studying will have studied will have been studying 过去将来would study would be studying would have studied would have been studying

时态(Tense)是表示行为、动作和状态在各种时间条件下的动词形式。因此,当我们说时态结构的时候,指的是相应时态下的动词形式。 Ⅰ现在时态:四种 1.一般现在时态:表示现存的状态(be动词),经常做的动作 I do it. 我(经常)做这件事。 2.现在进行时态:表示正在进行的动作 I am doing it. 我(现在)正在做这件事。 3.现在完成时态:表示现在已经完成,对现在产生影响,形成结果 I have done it. 我(现在)已经做完这件事了。 4.现在完成进行时态:表示一直在进行的动作(字面意思已经在进行) I have been doing it. 我(现在)一直正在做这件事。 Ⅱ过去时态:四种 5.一般过去时态:表示过去存在的状态(be动词),经常做的动作 I did it. 我(过去经常)做这件事。 6.过去进行时态:表示过去正在进行的动作 I was doing it. 我(过去的某个时间)正在做这件事。 7.过去完成时态:表示过去已经完成,对过去的某个时间产生影响,形成结果 I had done it. 我(过去的某个时间)已经做完这件事了。 8.过去完成进行时态:表示一直在进行的动作(字面意思已经在进行) I had been doing it. 我(到过去的某个时间)一直在做这件事。 Ⅲ 将来时态:四种 9.一般将来时态:表示将来存在的状态(be动词),将来经常做的动作

一般将来时态用法

一般将来时态用法 一般将来时表示在将来某个时间要发生的动作或存在的状态。 一. 一般将来时的基本用法: 表示“纯粹的将来”: ①表示将要发生的动作或情况,常带有表示将来的时间状语,如tomorrow, next week, in two days, from now on 等。如:It will be fine tomorrow. 明天天气晴朗。 ②表示预料将要发生的动作或情况。如: You will feel better after having this medicine. 吃了这药,你就会感觉好些的。 二. 一般将来时的构成: 1. 由助动词“ shall/ will +动词原形”构成,shall 用于第一人称,will 用于第二、第三人称,而美式英语在陈述句中无论什么人称,一律用will. 表示“带有情态意义的将来”,用来表示意图,用will 来表示。如:I will be more careful next time. 下次我要更加小心。 I won't go shopping this afternoon, but she will. 今天下午我不想去购物,但她想去。 2. will 在疑问句中,用来表示有礼貌地征询对方的意见。如:Will you have some more tea 要不要再喝点茶 What shall we do this weekend 本周末我们要干什么 3. 一般将来时的否定和疑问形式: 一般将来时的否定形式是will not ,缩写为won't; shall not ,缩写为shan't 。 一般将来时的疑问形式是把will/ shall 提到主语前。如:He won’t go to th e park this Sunday. 本周日他不去公园。 Will you go swimming with me 和我一起去游泳好吗 4. shall只用于第一人称,如用于第二、第三人称,就失去助动词的意义,已变为情态动词,试比较: He shall come. 他必须来。(shall有命令的意味。) He will come. 他要来。(will 只与动词原形构成一般将来时。) 5. 关于“shall/will”的用法的五个规则:

时态数据库

1.时态数据库的定义 区别于传统的关系型数据库(RDBMS),时态数据库(Temporal Database)主要用于记录那些随着时间而变化的值的历史,而这些历史值对应用领域而言是重要的,这类应用有:金融、保险、预订系统、决策支持系统等。 目前时态数据库还没有像如Oracle、SQL Server等大型关系数据库那样的产品。在当前时态数据库技术尚未完全成熟的现状下,DBMS提供商不会轻易把时态处理功能引入现有的DBMS中,因此,利用成熟的RDBMS数据库,建立时态数据库的中间件,在现阶段是一个较好的选择,因此就应运而生TimeDB和TempDB了。 2.时态数据库的类型 时态数据库理论提出了三种基本时间:用户自定义时间、有效时间和事务时间。同时把数据库分为四种类型:快照数据库、回滚数据库、历史数据库和双时态数据库。 1)用户自定义时间:指用户根据自己的需要或理解定义的时间。时态数据库系统不 处理用户自己定义的时间类型。因此,用户自定义时间是和应用相关的,不在时态数据库处理的范围之内。 2)有效时间(Valid-Time):指一个对象在现实世界中发生并保持的时间,即该对 象在现实世界中语义为真的时间,包含Valid-From和Valid-To两个值。它可以指示过去、现在和未来。例如,考虑事实?小明从2003年到2007年是大学生?,那么时间区间[2003, 2007]是事实?小明是大学生?的有效时间区间,该事实在该时间区间内为真。有效时间可以是时间点、时间点的集合、时间区间或者时间区间的集合,或者是整个时间域。有效时间由时态数据库系统解释并处理,在查询的过程中对用户透明。用户也可以显式地查询和更新有效时间。 3)事务时间(Transaction-Time):指一个数据库对象发生操作的时间,是一个事 实存储在数据库、或者在数据库中发生改变的时间,包含Transaction-From和Transaction-To两个值。当用户对数据库状态进行更改时,会产生各种操作历史,事务时间真实地记录了数据库状态变更的历史。有时也称事务时间为系统时间。 4)快照数据库:快照数据库是反映现实世界某一瞬间情况的数据模型。它记录了特 定时刻的数据库状态。快照数据库采用这样的假设:一个存储在数据库中的元组,一定是真实世界中的有效事实。 5)历史数据库:数据库中被管理对象的生命周期是对象的有效时间,每一个元组记 录了数据的一个?历史?状态。历史数据库中没有约束时间的表示方法,可以是时间点的集合、时间区间或者区间集合等形式表示。 6)回滚数据库:数据库中被管理对象的生命周期是事务时间的数据库。它保存了数 据库中事务提交、状态演变的历史状态。 7)双时态数据库:数据库中元组包含一个系统支持的有效时间和一个系统支持的事 务时间的数据库,称为双时态数据库。双时态数据库具备了快照数据库、历史数据库和回滚数据库的特点,存储了现实世界和数据库系统的变更历史。 8)Now:Now的中文意思是当前时间,是一个时间变元,随着当前时间的变化而变化, 记录了随时间变化的信息,它的有效值依赖于当前时间。但在很多应用当中,now 值还能表示?过去?和?未来?时间,这就是now语义的研究课题,它对于提高时态系统查询效率具有比较重要的意义。 3.时态数据库脚本ATSQL的使用 时态数据处理构件根据ATSQL2的语法引入了Now、Beginning和Forever三个变元。 Beginning和Forever分别表示时态数据处理构件所能表示的时间起点和终点。Now表示当前时间。每次执行操作时必须使Now绑定到一个固定的值(操作执行的当前时间),

英语八大时态结构-含例句

时态(8个): 一般现在时: 经常或习惯性的动作 结构: 肯定句主语+be (am, is, are ) + 其他 eg: I am Chinese. 否定句主语+be not +其他 eg: I am not a boy. 疑问句 Be+主语+其他 eg: Are you a girl? 或: 肯定句主语+动原+其他 (三单作主语动词要变形) eg: I (He) often get (gets) up early. 否定句主语+don't+动原+其他 (三单作主语don't变doesn't) eg: I (She) don’t (doesn’t) like him. 疑问句 DO+主语+动原+其他 (三单作主语do变does) eg: Do (Does) you (she) like playing baseball? 关键词: sometimes=at times有时,often经常, usually通常, always总是, every day每天, on Sunday afternoon在周日下午, five days a week一周五天, three times a month 一个月三次… 现在进行时: 正在发生的动作 结构: 肯定句主语+be+动词的现在分词(ing)+其他 eg: I am reading now. 否定句主语+be not+动词的现在分词(ing)+其他 eg: I am not working. 疑问句 Be +主语+动词的现在分词+其他 eg: Are you sleeping? 关键词:now现在, at the moment此刻, look, listen, keep quiet等提示语. 一般将来时: 将要发生的动作 结构: 肯定句主语+will+动词原型+其他 eg: I will call you later. 否定句主语+will not +动词原型+其他 eg: I will not go to the park. 疑问句 Will +主语+动词原型+其他 Will you go shopping with her? (will 可改为be going to ,当主语是第一人称时will可用shall) 关键词:tomorrow, next year明年, tonight今晚, this year今年, at the end of this term这学期期末, from now on从现在开始, soon一会儿马上, later后稍后,in three days三天之内, in the future 未来… 一般过去时: 过去发生的动作强调时间 句子结构:肯定句主语+be(was,were)+其他 eg: I was born on July.1st, 2000. 否定句主语+be not+其他 eg: I was not born in 1999. 疑问句 Be+主语+其他 eg: Were you born in January? 或: 肯定句主语+动词的过去式(ed)+其他 Lily went shopping yesterday. 否定句主语+did not+动原+其他 eg: He did not go to school today. 疑问句 Did+主语+动原+其他eg:Did she pass the test? 关键词:yesterday昨天,last week上周, last year去年, 一段时间+ago如ten years ago十年前 five hours ago五小时前, in +年/月,on+具体日期... Just now=a moment ago刚才,in the old days从前, long ago很久以前... 过去进行时: 过去正在发生的动作 结构: 肯定句主语+was/were+动词的现在分词+其他

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