动词时态的句子结构及关键词

小学四种时态句子结构以及各种时态标志词一般现在时的句型结构一般现在时的标志词：sometimes, often, usually, always, every day,five days a week, three times a month等.1.含有be动词的句子结构的变化：①肯定句：主语+be(am,is,are)+其他。

如：I am a boy. 我是一个男孩。

②否定句：主语+ be + not +其他。

如：He is not a worker.他不是工人。

③一般疑问句：Be +主语+其它？如：-Are you a student? -Yes. I am. / No, I'm not.④特殊疑问句：疑问词+一般疑问句？如：Where is my bike?2.含有行为动词的句子结构的变化：①肯定句：主语+行为动词(+其它)。

如：We study English.我们学习英语。

②否定句：主语+ don't( doesn't ) +动词原形(+其它)。

如：I don't like bread. He doesn't often play.③一般疑问句：Do( Does ) +主语+动词原形+其他？如：-Do you often play football? - Yes, I do. / No, I don't. -Does she go to work by bike? - Yes, she does. / No, she doesn't.④特殊疑问句：疑问词+一般疑问句？即：疑问词+ Do( Does ) +主语+动词原形+其他？如：How does your father go to work?一般过去时标志词：yesterday, last, the day before …, ago和过去的某个时间，具体如下：（1）yesterday, yesterday morning/afternoon/evening , last week, last year, at the end of last term/week/mo nth/year等,（2）一段时间+ago如:ten years ago, five hours ago,（3）过去的某个时间，如： on January 1st,2004, in the 1980s等.1.含有be动词的句子结构的变化：⑴am 和is在一般过去时中变为was。

初中英语时态及结构一般现在时: 句子结构: 肯定句主语+be (am, is, are ) + 其他否定句主语+be not +其他疑问句 Be+主语+其他或: 肯定句主语+动词原型+其他( 第三人称单数作主语动词要加"s" ) 否定句主语+don't+动词原型+其他(第三人称单数作主语don't改为doesn't) 疑问句 DO+主语+动词原型+其他(第三人称单数作主语do改为doess) 关键词: sometimes, often, usually, always, every day, on Sunday afternoon, at 10 o'clockin the morning, five days a week, three times a month等. 注:在时间壮语从句,条件壮语从句中,常用一般现在时表示将来时,这时一般从句用一般现在时,主句用将来时一般现在时除主语是第三人称单数时谓语动词要加s外，一律用动词原形。

现在进行时: 句子结构:肯定句主语+be +动词的现在分词+其他否定句主语+be not+动词的现在分词+其他疑问句 Be +主语+动词的现在分词+其他关键词:now, right now, at the moment, It's+几点钟等的句子.或look, listen, keep quiet等提示语现在进行时由 am/is/are 加现在分词构成。

例句：They’re having a meeting. 他们在开会。

I’m studying at an evening school. 我在上夜校。

Mike is coming home on Thursday. 迈克星期四回来。

They’re having a party next week. 下星期他们将开一个晚会。

You’re always interrupting me! 你老打断我的话!(抱怨)My father is always losing his car keys. 我爸老丢车钥匙。

动词时态变化动词是语言中最基本的词汇之一，用于表达动作、状态或情感。

在不同的语境中，动词的时态也会发生变化，以便准确地传达时间信息。

本文将介绍动词的时态变化规则，并提供一些例子来帮助读者更好地理解。

一、一般现在时（Simple Present）一般现在时用于表达经常性的动作、习惯、事实或普遍真理，句子结构为主语 + 动词原形。

1. 主语 + 动词原形例如：- I eat breakfast every morning.- She works at a hospital.- They live in London.- Cats like to play with yarn.2. 主语 + 助动词（do/does）+ 动词原形例如：- He doesn't play basketball.- Do you like ice cream?- My mother does the grocery shopping on weekends.二、一般过去时（Simple Past）一般过去时用于表示已经发生或完成的动作，句子结构为主语 + 动词过去式。

1. 主语 + 动词过去式例如：- I studied English yesterday.- We went to the beach last summer.- They played soccer in the park.2. 主语 + 助动词（did）+ 动词原形例如：- Did you watch the movie?- She didn't finish her homework.- What did they eat for dinner?三、一般将来时（Simple Future）一般将来时用于表示将来要发生的动作或状态，句子结构为主语 + 将来时助动词（will/shall）+ 动词原形。

1. 主语 + will/shall + 动词原形例如：- I will visit my grandparents next week.- We shall go shopping this afternoon.- She will not attend the meeting.2. 祈使句：动词原形（用于表示请求、建议、命令等）例如：- Please wait for me here.- Be careful when crossing the road.- Don't forget to bring your umbrella.四、现在进行时（Present Continuous）现在进行时用于表示正在进行的动作，句子结构为主语 + 现在进行时助动词（am/is/are）+ 动词现在分词。

小学四种时态句子结构以及各种时态标志词一般现在时的句型结构一般现在时的标志词：sometimes, often, usually, always, every day, five days a week, three times a month等.1. 含有be动词的句子结构的变化：①肯定句：主语+be(am,is,are)+其他。

如：I am a boy. 我是一个男孩。

②否定句：主语+ be + not +其他。

如：He is not a worker.他不是工人。

③一般疑问句：Be +主语+其它？如：-Are you a student? -Yes. I am. / No, I'm not.④特殊疑问句：疑问词+一般疑问句？如：Where is my bike?2. 含有行为动词的句子结构的变化：①肯定句：主语+行为动词(+其它)。

如：We study English.我们学习英语。

②否定句：主语+ don't( doesn't ) +动词原形(+其它)。

如：I don't like bread. He doesn't often play.③一般疑问句：Do( Does ) +主语+动词原形+其他？ 如：-Do you often play football? - Yes, I do. / No, I don't. -Does she go to work by bike? - Yes, she does. / No, she doesn't.④特殊疑问句：疑问词+一般疑问句？即：疑问词+ Do( Does ) +主语+动词原形+其他？ 如：How does your father go to work?一般过去时句型结构一般过去时标志词：yesterday, last, the daybefore …, ago和过去的某个时间，具体如下：（1）yesterday,yesterday morning/afternoon/evening ,last week, last year, at the end of last term/we 等,（2）一段时间+ago如:ten years ago, five hours ago,（3）过去的某个时间，如： on January 1st,2004, in the 1980s等.1.含有be动词的句子结构的变化：⑴am 和is在一般过去时中变为was。

英语八大时态结构（含例句）时态概念：不同时间发生的动作或存在的状态，用不同的动词形式表示，称为时态。

一、一般现在时:?表示现在经常发生的或习惯性的动作，及客观现实和普遍真理。

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?you?like?playing?baseball??Does?she?like?playing?football???The?sun?rises?in?the?eat?.?关键词:?sometimes有时，often经常,?usually通常，always总是，everyday每天，?on?Sunday?afternoon在周日下午,?fiv e?days? a? w eek 一周五天，three?times?a?month一个月三次…?二、现在进行时:?表示现在此时此刻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。

最新初中英语各个时态的句子结构及标志词1.概念：一般现在时用于描述经常或反复发生的动作或行为，以及当前的某种状态。

动词使用原形，但如果主语是第三人称单数，则动词需要变成第三人称单数形式。

2.标志词：always。

usually。

often。

sometimes。

every week (day。

year。

month。

)。

once a week (day。

year。

month。

)。

XXX。

3.肯定形式：主语+动词原形+其他（如果主语是第三人称单数，则动词变为第三人称单数形式）4.否定形式：主语+am/is/are+not+其他；如果谓语动词是行为动词，则使用：主语+do+not+动词原形+其他。

如果主语是第三人称单数，则使用：主语+does+not+动词原形+其他。

(is not缩写:isn’t。

are not缩写:aren’t。

does not缩写: doesn’t。

do not缩写: don’t)5.一般疑问句：be+主语+其他？Do/Does+主语+其他？6.例句:1.我经常在家吃饭。

I often have dinner at home.我不经常在家吃饭。

I d on’t often have dinner at home.你经常在家吃饭吗？Do you often have dinner at home?2.XXX喜欢唱歌。

XXX singing.XXX不喜欢唱歌。

XXX’t like singing.XXX喜欢唱歌吗？Does Tom like singing?3.他总是准备着去帮助别人。

He is always ready to help others.他不总是准备着去帮助别人。

He is not always ready to help others.他总是准备着去帮助别人吗？Is he always ready to help others?二、一般过去时1.概念：一般过去时用于描述过去某个时间发生的动作或状态，以及过去的惯性或经常性的动作或行为。

各个时态的句子结构及标志词一、一般现在时1.概念：经常、反复发生的动作或行为及现在的某种状况;一般现在时用动词原形表示;如主语为第三人称单数,动词上要改为第三人称单数形式;2.标志词：Always, usually, often, sometimes, every week day, year, month…, once a weekday, year, month…, on Sundays3.肯定形式：动词+动词原形+其他4.否定形式：主语+am/is/are +not+其他;此时态的谓语动词若为行为动词,则为：主语+do+not+动词原形+其他,如主语为第三人称单数,则用：主语+does+not+动词原形+其他;is not缩写:isn’t, are not缩写:aren’t, does not缩写: doesn’t , do not 缩写: don’t5.一般疑问句：be+主语+其他Do/Does+主语+其他二、一般过去时1.概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为;用动词的过去时表示;2.时间状语：, yesterday, the day before yesterday, last week, lastyear, night, month…, 时间词+ago,two years ago, in/on+表示过去的时间词in 1989, just now刚才, at the age of 5, one day, long long ago很久以前, once upon a time曾经3.基本结构：be动词was, were；行为动词的过去式助动词：did4.肯定形式：主语+动词的过去时+其他5.否定形式：主语+was/were +not+其他; 主语+did not+动词原形+其他did not 缩写：didn’t6.一般疑问句：was或were放于句首；用助动词do的过去式did 提问,同时还原行为动词;即：was/were+主语+其他Did+主语+动词原形+其他三．一般将来时1.概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事;2.时间状语：Tomorrow, next dayweek, month, year…,soon很快, in a few minutes几分钟之后,b y…by 2000, 到2000年时,the day after tomorrow, in+时间状语in two hours 两小时后,in the future在将来in future从今,往后3.肯定结构：主语+am/is/are +going to + 动词原形+其他；主语+will/shall + 动词原形+其他.4.否定形式：主语+am/is/are+not+ going to+动词原形；主语+will/shall+not+动词原形+其他.will not 缩写：won’t shall not 缩写：shan’t5.一般疑问句：be放于句首；will/shall提到句首;Be+主语+going to+动词原形+其他Will/shall+主语+动词原形+其他四．现在进行时1.概念：表示现阶段或说话时正在进行的动作及行为;2.时间状语：Now, at this time此时, at this moment此刻, look, listen, at present, these days, this week3.肯定形式：主语+be +doing +其他4.否定形式：主语+be +not +doing+其他5.一般疑问句：把be动词放于句首; Be+主语+doing+其他6.7. 不用进行时的动词1 事实状态的动词:have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continueI have two brothers.This house belongs to my sister.2心理状态的动词: know, realize, think see, believe, suppose, imagine, agree, recognize, remember, want, need, forget, prefer, mean, understand, love, hateI need your help.He loves her very much.3 瞬间动词:accept, receive, complete, finish, give, allow, decide, refuse.I accept your advice.4系动词:seem, remain, lie, see, hear, smell, feel, taste, get, become, turnYou seem a little tired.五. 过去进行时1. 概念：过去进行时主要表示过去某一时刻正在进行的动作,或表示过去某一阶段一直在进行的动作2. 过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候,另一个短动作发生;3. 常用的时间状语: just then那时, at this time yesterday, yesterday afternoon, at that time, this morning, the whole morning, the whole morning, all day yesterday, from nine to ten last evening, those days或以when, while引导的谓语动词是一般过去时的时间状语等;否定句则在was/were后加一个not,疑问句将was/were提前则可;如：He was reading a book at 5:00pm yesterday.→He was not reading a book at 5:00 yesterday.→Was he reading a book at 5:00 yesterdayYes, he was./ No, he wasn’t.→What was he doing at 5:00 yesterday5.1也就是说用一般过去时,只表示有过这件事；用过去进行时,则强调动作的连续性;①I wrote a letter this morning. 今天上午我写了一封信;信写完了I was writing a letter this morning. 今天上午我在写一封信;信不一定写完②The children watched TV yesterday evening. 昨天晚上孩子们看了电视;强调过去发生了这件事The children were watching TV yesterday evening. 昨晚孩子们都在看电视;强调昨晚看电视这一动作的持续性7.when和while的区别：他们作从属连词时都有“当……. 时候”之意,用法稍有不同：①when引导的时间状语从句的谓语动词可以是短暂性动词,也可以是延续性动词,而while引导的时间状语从句中的谓语动词只能是延续性动词;②when引导的从句谓语动词如果是短暂性动词则用一般过去时,主句是延续性动词则用过去进行时,从句动作发生在主句动作的时间段之内长动作用过去进行时,短动作用一般过去时；如果主句和从句两个谓语动词都是延续性动词则全部用过去进行时,这时when和while都可以用;③when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生;④when和while两个词还可以用作并列连词,但意思不同,when相当于“在那时”,等于at that time或just then;而while则相当于“而；却；但是”；相当于but,表示对比关系;这一点暂时可以不掌握eg.⑴ I was playing computer games when my father got home.= When my father got home,I was playing computer games.2 Mother was cooking when/while I was doing my homework.= When/While I was doing my homework, mother was cooking.六、现在完成时1. 用法1：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;标志词：already, yet, just, ever, never, before2. 用法2：表示：过去已经开始,持续到现在的动作或状态;标志词：for, since, since…ago3. 注意：非延续性动词不能用“现在完成时+ 表示一段时间的状语”的句型中;这类动词有：come, go, start, leave, die, buy, finish, join, borrow, stop等;但它们能够用表示持续状态的相应的延续性动词替换句中的非延续性性动词;例如：arrive, come →be here, be in buy →have begin, start →be on ;die →be dead finish, end →be over go out →be outjoin →be in borrow→keep finish/end →be overclose →be closed leave, move →be away; fall asleep →be asleep5.比较过去时与现在完成时1过去时常与具体的时间状语连用,而现在完成时通常与模糊的时间状语连用,或无时间状语;一般过去时的时间状语:yesterday, last week,…ago, in1980, in October, just now, 具体的时间状语现在完成时的时间状语for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always,3现在完成时可表示持续到现在的动作或状态,动词一般是延续性的,如live, teach, learn, work, study, know.过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等;举例：1. I saw this film yesterday. I have seen this film.强调看的动作发生过了; 强调对现在的影响,电影的内容已经知道了;2. He has been in the League for three years.在团内的状态可延续He has been a League member for three years.是团员的状态可持续He joined the League three years ago.三年前入团,joined为短暂行为;6. have/has gone to 、have/has been to 和have/has been in的区别have/ has gone to 去了,在去某地的路上或在某地,人还未回来have/ has been to 曾经去过,人已经回来了have/ has been in 已经在,常与一段时间连用如：He has been to Shenyang before. 他以前曾去过沈阳;He has been in Shenyang for ten years. 他在沈阳10年了;Has he gone to Shenyang 他去沈阳了吗。

动词时态的句子结构及关键词动词时态的句子结构及关键词:一般现在时:句子结构：肯定句主语+be （am, is, are ） + 其他否定句主语+be not + 其他疑问句Be+ 主语+其他或：肯定句主语+动词原型+其他（第三人称单数作主语动词要加"s" ）否定句主语+don't+ 动词原型+其他（第三人称单数作主语don't 改为doesn't）疑问句DO+主语+动词原型+其他（第三人称单数作主语do改为doess）关键词： sometimes, often, usually, always, every day, on Sundayafternoon, at 10 o'clockin the morning, five days a week, three times a month 等.注：在时间壮语从句,条件壮语从句中,常用一般现在时表示将来时,这时一般从句用一般现在时,主句用将来时现在进行时：句子结构:肯定句主语+be +动词的现在分词+其他否定句主语+be not+动词的现在分词+其他疑问句Be + 主语+动词的现在分词+其他关键词:now, right now, at the moment, lt's+ 几点钟等的句子.或look, listen,keep quiet 等提示语.一般将来时:句子结构：肯定句主语+will+动词原型+其他否定句主语+will not +动词原型+其他疑问句Will +主语+动词原型+其他（will 可改为be going to , 当主语是第一人称时will 可用shall）关键词:tomorrow, tomorrow morning, at seven o'clock tomorrow evening, next year,at ten o'clock next Sunday, this year, at the end of this term, from now on, in the year 2008, soon, in a few days' time, in the future 等.一般过去时:句子结构：肯定句主语+be（was,were）+ 其他否定句主语+be not+其他疑问句Be+ 主语+其他或: 肯定句主语+动词的过去式+其他否定句主语+did not+动词原型+其他疑问句Did+ 主语+动词原型+其他关键词：yesterdayyesterday morning 等,last week, last year, at the end oflast term,一段时间+ago 如:ten years ago, five hours ago, on January 1st,2004, inthe1980s 等.Just now,in the old days, long ago, a moment ago 等.过去进行时:句子结构: 肯定句主语+was/were+ 动词的现在分词+其他否定句主语+was/were not +动词的现在分词+其他疑问句Was/Were + 主语+ 动词的现在分词+其他关键词：具体时间+过去的时间壮语如:at ten o'clock yesterday morning, at this time last Sunday 等.现在完成时：句子结构：肯定句主语+have/has+动词的过去分词+其他(第三人称单数用has) 否定句主语+have/has not+动词的过去分词+其他疑问句Have/Has + 主语+ 动词的过去分词+其他关键词：already, yet, just, ever, never ,so far, for + 一段时间,since+ 过去的时间或过去时从句.或this year alone" 今年以来",these five years alone" 这五年以来",in the last ten years " 在过去的十年中"等.过去将来时：句子结构：肯定句主语+ would+ 动词原型+其他否定句主语+ would not + 动词原型+ 其他疑问句Would+ 主语+动词原型+其他(would 可改为was/were going to , 主语第一人称时would 可用should) 过去将来时主要用在宾语从句中.过去完成时：句子结构：肯定句主语+had +动词的过去分词+其他否定句主语+had not +动词的过去分词+其他疑问句Had+ 主语+动词的过去分词+其他关键词:by+过去某一时间点如:by last year, by the end of+ 过去某一时间点如：by the end of last year, before+ 过去某一时间点,by the time + 从句,或宾语从句中最后,请记住：It's not the end of the world, try to look on the bright side of thing, I'm sure it will be all right.这不是世界末日,试着往事情好的方面看,我确认一切都会好起来. 英语动词有两种语态：主动语态和被动语态。

小学五大时态经常或习惯性的动作时间标志词: 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…句子结构:1.有肯定句：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.一般疑问句：Be+主语+其他eg: Are you a girl特殊疑问句：疑问词+一般疑问句eg: Who are you2.肯定句：主语+行为动词+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+动词原形+其他. 三单作主语don't变doesn'teg: I She don’t doesn’t like him.一般疑问句：DO+主语+动词原形+其他三单作主语do变doeseg: Do Does you she like playing baseball正在发生的动作标志词：now现在, at the moment此刻, look看, listen听, keep quiet安静Array句子结构: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.一般疑问句: Be +主语+动词的现在分词+其他eg: Are you sleeping特殊疑问句：疑问词+一般疑问句eg: What are you doing时间标志词:tomorrow明天, 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…结构:肯定句：主语+will+动词原形+其他. eg: I will call you later.否定句：主语+will not +动词原形+其他. eg: I will not go to the park.一般疑问句：Will +主语+动词原形+其他eg:Will you go shopping with her特殊疑问句：疑问词+一般疑问句Who will you go shopping withwill 可改为be going to ,当主语是第一人称时will可用shall肯定句：主语+be going to+动词原形+其他. eg: I am going to call you later. 否定句：主语+be going to not +动词原形+其他.eg: I am not going to go to the park.一般疑问句：Be +主语+going to+动词原形+其他eg: Are you going to go shopping with her特殊疑问句：疑问词+一般疑问句eg: What are you going to do强调过去时间发生的动作关键词:yesterday昨天, last week上周, last year去年, 一段时间+ago, 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...句子结构:肯定句: 主语+bewas,were+其他. eg: I was born on , 2000.否定句: 主语+was/were not+其他. eg: I was not born in 1999.一般疑问句: Was/were+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. eg:Lily went shopping yesterday. 否定句: 主语+did not+动词原形+其他. eg: He did not go to school today. 一般疑问句: Did+主语+动词原形+其他eg:Did she pass the test过去正在发生的动作标志时间具体到过去的某个点：如:at ten o'clock yesterday morning, at this moment last Sunday 上周日的这个时候...句子结构:肯定句： 主语+was/were+动词ing+其他eg: I was doing my homework at 8 o’clock yesterday evening. 否定句： 主语+was/were not +动词ing+其他They were not staying at home 8：00 t last Sunday. 一般疑问句： Was/Were + 主语+ 动词ing+其他Were you sleeping 11：00 last night特殊疑问句：疑问词+一般疑问句When were you sleeping。

高考时态知识点总结时态是英语语法中非常重要的一个概念，掌握好时态的使用可以使我们的表达更加准确、清晰。

在高考中，时态知识点的考查频率也相当高。

下面是对高考常考的时态知识点进行总结，希望能对广大考生有所帮助。

一、一般现在时（Simple Present Tense）一般现在时用于表示习惯性的动作、客观事实、真理以及现在的状态等。

常见的句子结构有：1. 主语+谓语动词：I play basketball.2. 主语+be（am/is/are)+表语：They are students.3. 主语+助动词do/does+动词原形：She doesn't like coffee.二、一般过去时（Simple Past Tense）一般过去时用于表示发生在过去某个时间的动作或状态。

常见的句子结构有：1. 主语+谓语动词：She danced at the party last night.2. 主语+助动词did+动词原形：I didn't see him yesterday.三、一般将来时（Simple Future Tense）一般将来时用于表示将来某个时间将要发生的动作或者一般的计划、安排。

常见的句子结构有：1. 主语+will+动词原形：He will go to Beijing tomorrow.2. 主语+be going to+动词原形：We are going to visit our grandparents next week.四、现在进行时（Present Continuous Tense）现在进行时用于表示现阶段正在进行的动作。

常见的句子结构有：1. 主语+be（am/is/are）+动词-ing形式：They are playing tennis now.2. 主语+be（am/is/are）+not+动词-ing形式：She is not watching TV at the moment.五、过去进行时（Past Continuous Tense）过去进行时用于表示过去某个时间正在进行的动作。