过去进行时、when和while引导时间状语从句的区别
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when和while的区别①when是at or during the time that, 既指时间点,也可指一段时间;while是during the time that,只指一段时间。
因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
Why do you want a new job when you've got such a good one already?(get为短暂性动词)你已经找到如此好的工作,为何还想再找新的?Sorry,I was out when you called me.(call为短暂性动词)对不起,你打电话时我刚好外出了。
Strike while the iron is hot.(is为延续性动词,表示一种持续的状态)趁热打铁。
②when 说明从句的动作和主句的动作可以是同时,也可以是先后发生;while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导,如:a. When the teacher came in, we were talking. 当此句改变主从句的位置时,则为:While we were talking, the teacher came in.b. They were singing while we were dancing.④when和while 还可作并列连词。
when表示“在那时”;while表示“而,却”,表对照关系。
如:a. The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的声音。
when 和while的用法区别两者的区别如下:①when是at or during the time that, 既指时间点,也可指一段时间;while是during the time that,只指一段时间,因此when引导的时间状语从句中的动词可以是终止性动词,也可以是延续性动词,而while从句中的动词必须是延续性动词。
②when 说明从句的动作和主句的动作可以是同时,也可以是先后发生;while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
③由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时;如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导,如:a. When the teacher came in, we were talking.当此句改变主从句的位置时,则为:While we were talking, the teacher came in.b. They were singing while we were dancing.④when和while 还可作并列连词。
when表示“在那时”;while表示“而,却”,表对照关系。
如:a. The children were running to move the bag of rice when they heard the sound of a motor bike.孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的声音。
b. He is strong while his brother is weak.他长得很结实,而他弟弟却很瘦弱。
一。
引导时间状语从句时,WHILE连接的是时间段,而WHEN连接的多是时间点例如What does your father do while your mother is cooking?What does your mother do when you come back?二,WHILE可以连接两个并列的句子,而WHEN不可以例如I was trying my best to finish my work while my sister was whtching TV三,WHEN是特殊疑问词,对时间进行提问,WHILE不是。
when和while时间状语从句一、when引导的时间状语从句1. 基本用法- when引导的时间状语从句,既可以表示在某一时刻发生的动作,也可以表示在某一时间段内发生的动作。
从句中的动词可以是短暂性动词,也可以是延续性动词。
- 例如:- When I got home, my mother was cooking.(got是短暂性动词,这里表示在我到家这个时刻,妈妈正在做饭)- When we lived in the countryside, we often went fishing.(lived是延续性动词,描述我们住在乡下这个时间段内经常去钓鱼的情况)2. 时态搭配- 当主句是一般将来时,从句常用一般现在时表将来。
- 例如:When he arrives tomorrow, we will have a party.(arrives是一般现在时,主句will have是一般将来时)- 当主句是过去进行时,从句用一般过去时,表示在过去某个动作进行时,另一个动作发生了。
- 例如:I was reading a book when he came in.(was reading是过去进行时,came是一般过去时)3. 位置特点- when引导的时间状语从句可位于主句之前或之后。
当位于主句之前时,从句后常用逗号与主句隔开。
- 例如:When it rains, the ground gets wet.(从句在前)- The birds fly south when winter comes.(从句在后)二、while引导的时间状语从句1. 基本用法- while引导的时间状语从句,从句中的动词必须是延续性动词,表示在某一时间段内,主句和从句的动作同时发生。
- 例如:While I was reading, my sister was watching TV.(reading和watching都是延续性动词,说明我读书和妹妹看电视这两个动作同时进行)2. 时态搭配- 当主句和从句都是过去进行时,表示两个动作在过去某一时间段内同时进行。
when和while的用法和区别When 和 While 的用法和区别在英语学习中,when 和 while 这两个词常常让学习者感到困惑。
它们都可以用来引导时间状语从句,但在具体的用法和所表达的含义上却存在着一些差异。
下面我们就来详细探讨一下 when 和 while 的用法和区别。
一、When 的用法1、表示“当时候”,引导的动作可以是短暂性的,也可以是持续性的。
例如:When I got home, my mother was cooking (我到家时,妈妈正在做饭。
)在这个句子中,“got home”是短暂性动作。
2、还可以表示“就在这时,突然”。
例如:I was walking along the street when suddenly someone called me (我正在街上走着,突然有人叫我。
)3、 When 可以用来询问具体的时间。
例如:When did you come back? (你什么时候回来的?)二、While 的用法1、表示“在期间,当时候”,引导的动作通常是持续性的。
比如:While I was reading, he was playing games (我在读书的时候,他在玩游戏。
)这里“was reading”和“was playing games”都是持续性动作。
2、强调主句动作和从句动作同时发生。
例如:While he was doing his homework, I was watching TV (他在做作业的时候,我在看电视。
)三、When 和 While 的区别1、动作的性质When 引导的从句动作既可以是短暂性的,也可以是持续性的;而while 引导的从句动作通常是持续性的。
例如:When the doorbell rang, I was having a bath (门铃响时,我正在洗澡。
)(“rang”是短暂性动作)While I was sleeping, the phone rang (我睡觉的时候,电话响了。
while时间状语从句1、基本概念“while”可以引导时间状语从句,表示两个动作或状态同时发生。
(1)用法➢同时发生:“While”通常用来表示一个动作或状态持续进行的时候,另一个动作正在发生。
例如:o While I was studying, my sister was watching TV. (我学习的时候,我妹妹在看电视。
)➢对比:也可以用来表达对比两种不同情况或行为。
例如:o While some people enjoy shopping, others find it boring. (当一些人享受购物的时候,其他人却觉得这很无聊。
)(2)时态搭配➢当主句和从句描述的动作都发生在过去,并且强调同时性时,从句中可以使用过去进行时(was/were + 动词-ing)。
➢如果描述的是习惯性的动作或状态,可以使用一般现在时。
➢在某些情况下,从句可以用一般过去时来描述短暂的动作,而主句则可以使用过去进行时或其他时态来描述背景中的持续动作。
(3)注意事项➢“While”引导的时间状语从句中,从句的动作或状态必须是连续的或者习惯性的,这样才能与主句中的动作或状态形成对比或并行的关系。
(4)例句➢While she was sleeping, the house caught fire. (她睡觉的时候,房子着火了。
) ➢While we were eating dinner, the power went out. (我们正在吃晚饭时,突然停电了。
)2、while,when,as三者引导的时间状语从句的不同用法while,when,as三者引导的时间状语从句,三者都可表示“当……时候”,区别如下:(1)若主句表示的是一个短暂性动作,从句表示的是一个持续性动作,三者都可用:o He fell asleep when [while, as] he was reading.他看书时睡着了。
【注】as 用于引出一个持续性动词表示“在……期间”时,其谓语通常只能是那些含有动作(action)和发展(development) 意味的动词,一般不能是那些不用于进行时态的动词(如be, seem, love, want, agree, see, know, have 等),所以下面一句中的while 不能换为as:o A:I’m going to the post office. 我要去邮局。
状语从句的引导词及其区别状语从句在句中作状语,修饰主句中的动词、形容词和副词等。
按其作用和意义可分为时间、原因、目的、结果、条件、让步、方式、比较,地点九种。
下面对这九种从句的要点加以总结。
一、各类状语从句的引导词及易混词的区别。
1. 时间状语从句1) 引导词(1)表示“当……时候”:when, while, as, wheneverWhen I went into the room, he was at work. 当我进屋时,他在工作。
While it was raining, they went out. 正在下着雨时,他们出去了。
Whenever he comes, he brings a friend. 他每次来都带个朋友。
(2)表示“一……就……”:as soon as, the moment/minute/instant, immediately/directly/instantly , hardly/scarcely…when, no sooner…than I’ll tell you the news the moment you come.你一来我就告诉你那个消息。
The machine will start instantly you press the button. 你一按按钮机器就会开动。
Hardly/Scarcely had I got to the cinema when the film began. 我一到电影院,电影就开始了。
I had no sooner reached home than it began to rain.我一到家天就下起了雨。
(3)其它:after, before, since, until, by the time,each time, next timeThe boy went to bed after he finished my homework. 那男孩做完家庭作业之后才睡觉。
when和while的用法和区别When 和 While 的用法和区别在英语学习中,when 和 while 这两个词都是用来引导时间状语从句的,但其用法和所表达的含义却有所不同。
理解它们的用法和区别对于我们正确使用英语、准确表达时间关系至关重要。
首先,我们来看看 when 的用法。
When 既可以表示“在……时候”,也可以表示“就在这时”。
当 when 表示“在……时候”时,它所引导的从句中的动作可以是瞬间性动作,也可以是持续性动作。
比如:“When I was a child, I often played in the park”(当我还是个孩子的时候,我经常在公园玩耍。
)在这个句子中,“was a child”是持续性动作。
再比如:“When the bell rang, we all stopped talking”(当铃声响起时,我们都停止了讲话。
)这里“rang”就是瞬间性动作。
而当 when 表示“就在这时”时,通常用于以下结构:“be doing sth when”(正在做某事,就在这时……)或者“be about to do sth when”(正要做某事,就在这时……)。
例如:“I was walking along the street when it began to rain”(我正在街上走着,就在这时开始下雨了。
)“I was about to leave when the phone rang”(我正要离开,就在这时电话响了。
)接下来,我们看看 while 的用法。
While 通常表示“在……期间”,强调主句和从句的动作在同一时间段内同时发生,并且从句中的动作通常是持续性的。
例如:“While I was doing my homework, my mot her was cooking dinner”(当我在做作业的时候,我妈妈正在做晚饭。
)在这个句子中,“was doing my homework”和“was cooking dinner”是同时进行的持续性动作。
初中英语过去进行时(w h e n-w h i l e用法) -CAL-FENGHAI.-(YICAI)-Company One1Summary 3Past Continuous Tense过去进行时总结I. Definition 时态含义表示过去某一时刻或过去一段时间内正在进行的动作。
II. Time words 时间标志词1.then, at that time, this time yesterday, at 6 o’clock yesterday ...2.when/ while/ (just) as引导的时间状语从句III. Structure 动词结构was/ were + doing引导的时间状语从句在过去进行时态中的用法区别1.when 既可以和短暂性动词连用,也可以和连续性动词连用,句中一般翻译为“当......时候”/“就在那时”。
a.Someone knocked at the door when I was having breakfast.b.I was taking a bath when the telephone rang.2.while 只可以和连续性动词连用句中一般翻译成“当......时候”(=when)/ “然而”(强调前后两个动作同时进行)a.He cut himself while he was shaving.b.My wife was cooking the dinner while I was working in the garden.3.(just) as更强调“随着”,所引导的从句动作一般与主句动作伴随着发生。
a.Just as I was opening the front door, the telephone rang.b.The children were singing as they went home.IV. Exercises 练习( ) 1. We were reading the newspaper suddenly the light went out.A.whenB. whileC. beforeD. after( ) 2. While she TV in the sitting room, the bell .A.watches; rings C. was watching; rangB. is watching; rang D. watched; was ringing( ) 3. She herself while she off the bus.A.hurt; was getting C. hurt; is gettingB.Hurts; was getting D. hurts; is getting( ) 4. When he , I a bath.A.arriving; was having C. arrived; am havingB.arrived; was having D. arrives; was having( ) 5. When I saw her on the way here, she a magazine.A.readsB. is readingC. was readingD. will read6.昨天晚上8点你正在做什么?7.我到家的时候,妈妈正在厨房做饭。
when引导的从句和主句用什么时态
时间状语从句中,如果主句是现在的时态(现在进行时、现在完成时或一般现在时),从句可以用任意时态;如果主句是过去的时态(一般过去时、过去完成时、过去进行时、过去将来时),从句时态也必须用过去的时态(过去进行时、过去完成时、一般过去时、过去将来时)。
when,while,as都可以引导时间状语从句,但用法区别非常大,具体而言:
一、when可以和延续性动词连用,也可以和短暂性动词连用;而while和as只能和延续性动词连用。
①Why do you want a new job when you’ve got such a good one already?(get为短暂性动词)你已经找到如此好的工作,为何还想再找新的?
②Sorry,I was out when you called me.(call为短暂性动词)
对不起,你打电话时我刚好外出了。
③Strike while the iron is hot.(is为延续性动词,表示一种持续的状态)趁热打铁。
④The students took notes as they listened.(listen为延续性动词)学生们边听课边做笔记。
二、when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。
1.从句动作在主句动作前发生,只用 when。
①When he had finished his homework,he took a short rest.(finished先发生)
当他完成作业后,他休息了一会儿。
过去进行时
过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作,常和表过去的时间状语连用,如:
1. I was doing my homework at this time yesterday.
昨天的这个时候我正在做作业。
2. They were waiting for you yesterday.
他们昨天一直在等你。
3. He was cooking in the kitchen at 12 o'clock yesterday.
昨天12点,他正在厨房烧饭。
过去进行时的构成:
肯定形式:主语+was/were+V-ing
否定形式:主语+was not (wasn't)/were not (weren't)+V-ing
疑问形式:Was/Were+主语+V-ing。
基本用法:
1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。
常与之连用的时间状语有,at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…),when sb. did sth.等时间状语从句,如:
1)What were you doing at 7p.m. yesterday?
昨天晚上七点你在干什么?
2)I first met Mary three years ago. She was working at a radio shop at the time.
我第一次遇到玛丽是在三年前,当时她在一家无线电商店工作。
3)I was cooking when she knocked at the door.
她敲门时我正在做饭。
2. when后通常用表示暂短性动词,while后通常用表示持续性动词,而while所引导的状语从句中,谓语动词常用进行时态,如:
When the car exploded I was walking past it. = While I was walking past the car it exploded.
3. when用作并列连词时,主句常用进行时态,从句则用一般过去时,表示主句动作发生的过程中,另一个意想不到的动作发生了。
如:
I was walking in the street when someone called me.
我正在街上走时突然有人喊我。
4. when作并列连词,表示“(这时)突然”之意时,第一个并列分句用过去进行时,when引导的并列分句用一般过去时。
如:
1)I was taking a walk when I met him.
我正在散步,突然遇见了他。
2)We were playing outside when it began to rain.
我们正在外边玩,这时下起雨来了。
过去进行时和一般过去时的用法比较:
1)过去进行时表示过去正在进行的动作,而一般过去时则表示一个完整的动作。
例如:They were writing letters to their friends last night.
昨晚他们在写信给他们的朋友。
(没有说明信是否写完)
They wrote letters to their friends last night.
他们昨晚写了信给他们的朋友。
(表达了他们已写好的意思,整个写的过程已完成。
)2)当动作延续较长时间时或表示厌烦、赞美等感情色彩时,常用过去进行时表示。
例如:He was thinking more of others than of himself.
他考虑别人的比考虑自己的多。
(表示说话者赞扬的口气)
The boy was always making trouble then.
那时,他总是惹麻烦。
(表示说话者厌烦的口气)
3. 状语从句:
在复合句中,修饰主句的动词,形容词或副词等的从句叫做状语从句。
状语从句根据它表达的意思可分为时间、原因、条件、比较、目的、结果和让步等类型。
(根据考试说明,前四个要求掌握,其它要求理解)
时间状语(常由下列从属连词引导)
when, as ,while (当
……时候;一边……一边……;在……期间),
before(在……之前),after (在……之后),as soon as(一……就……)
since (自从……时起到现在),till/until (直到……时) 等
例如:
1)When my cousin came yesterday, I was playing volleyball.
昨天我表哥来的时候,我在打排球。
2)When the air moves, it is called wind.
空气流动,就产生风。
3)As the boys walked along the lake, they sang happily.
这些男孩一边沿湖边走,一边愉快地唱歌。
4)While I was sleeping, the UFO arrived.
当我在睡觉时,UFO到达了。
when和while引导时间状语从句的区别:
when表示“当……的时候”。
从句中既可用延续性动词,又可用非延续性动词,这些动词既可以表示动作,又可表示状态。
从句中的动作既可和主句的动作同时发生,又可在主句的动作之前或之后发生。
例如:Mary was having dinner when I saw her.
The boy was still sleeping when his mother got home yesterday morning.
When the teacher came in, the students stopped talking.
while表示“在……的时候”、“在……期间”、“一边……一边……”。
while从句中必须是表示动作或状态的延续性动词。
它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。
例如:The weather was fine while we were in Beijing.
She called while I was out.
I was drawing while my brother was reading.
He likes reading a newspaper while he is waiting for the bus.
如果主句的动作在从句的动作过程中发生,从句常用进行时。
例如:While we were swimming, someone stole our clothes.
Don't talk so loud while others are working.
有时when 和while 可以转换使用。
例如:The girl was watching TV when the alien got in.
如有侵权请联系告知删除,感谢你们的配合!。