when与while引导时间状语从句的区别(课堂PPT)
when 和while的用法区别
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。
外研版八年级时间状语从句when and while区别课件(共25张)
painting the walls.
Practice:
1. The girl was dancing __w_h_i_le__ the boy was singing. 2. _W__h_i_le___ we were playing on the playground, David was cleaning the classroom . 3. __W_h__ile___I was working , my dog was eating my socks. 4. _W__h_i_le_ Ben was reading a book, his brother was playing . 5. While Dad was sleeping, our cat __w_a_s_c_a_t_c_h_in_g_(catch) birds in the garden. 6. Mother was sweeping the floor while I _w_a_s_c_l_e_a_n_in_g__(clean) the window.
long action
While Jessica was working in the garden, her dog was digging a big hole. long action
long action
long action
While Dad was sleeping, his little boy was
Past Continuous Tense
We use the past continuous to describe an action which continued for a period in the past and to talk about things happening for a
when,while引导的时间状语从句复习PPT幻灯片
14
What were you doing when the rainstorm came?
I was waiting for the bus at the bus stop.
15
When I …
He was doing …
When I called him up, he was sleeping.
He was playing basketball at 8:00
yesterday morning.
4
Ask your partner what he/she was doing at 7:00 last night, then give a report.
At 7:00 last night … was reading. … was shopping…
9
What should we prepare before the rainstorm came?
radio
flashlight
matches wood
10
After the storm…
fallen trees broken windows fallen houses
11
Yesterday, there was a rainstorm. What were they doing when the rainstorm came? Here are some reports.
21
疑问式: Was / Were+主语+动词-ing (+其他)? 其肯定回答为：Yes, 主语(人称代词)+ was / were.； 否定回答为：No, 主语(人称代词)+ wasn’t / weren’t. 如：—Was Joe reading at the time of the
初中英语：对比when与while引导的时间状语从句
她总会寻求我的帮助。
He was fond of swimming when (he was) yet a child. 他还是孩子时，就喜欢
游泳。
He cut himself while (he was) shaving. 他在刮胡子时刮伤了自己。
4.在when和while引导的时间状语从句中，当主句和从句的主语不一致，但
是属于泛指意义的代词you时，从句中的主语和be动词也可省略。
例如：When (you are) in Rome, do as the Romans do. 入乡随俗。
A good way to master English is to spend holidays in English speaking coun-tries, and while (you are) there, talk to native speakers. 掌握英语的一个好方法是
在说英语的国家度假，当你在那里时，与英语母语人士多交谈。
5.在when和while引导的时间状语从句中，当从句和主句的主语不一致，但
是从句主语和主句中的宾语一致时，从句中的主语和be动词也可省略。
例如：He told me to remain silent when (I was) not asked. 当（我）没有被问到时，
他告诉我保持沉默。
She told her son not to talk while (he was) eating. 她告诉她儿子在（他）吃饭
时不要说话。
7。
过去进行时when和while引导时间状语从句的区别
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。
when while 在时间状语从句中的区别
when while 在时间状语从句中的区别摘要：1.了解when和while的定义及用法2.分析when和while在时间状语从句中的区别3.举例说明when和while的用法4.总结如何正确选择和使用when和while正文：在学习英语语法中，时间状语从句是一个重要的部分，而when和while 是其中最常用的连词。
它们都用来表示时间，但之间存在一定的区别。
本文将详细解析when和while在时间状语从句中的区别，并给出正确的使用方法。
首先，我们来了解一下when和while的定义及用法。
When意为“当……的时候”，它可以用来表示一个特定的时间点或一段时间，通常与动词的一般时态连用。
例如：- I will go to the park when it stops raining.（当雨停的时候，我将去公园。
）While意为“当……期间”，它可以表示一个动作正在进行的时候，或者两个动作同时发生。
通常与进行时态连用。
例如：- She is reading a book while I"m writing an article.（她正在看书，而我正在写文章。
）接下来，我们分析一下when和while在时间状语从句中的区别。
When 强调的是某个时间点或一段时间，而while强调的是动作正在进行或两个动作同时发生。
这就需要我们在选择连词时，根据句子的实际意义来判断使用哪个连词。
例如：- I will call you when I arrive at the station.（我到达车站时给你打电话。
）- She dances while the music plays.（音乐播放时，她跳舞。
）通过以上例子，我们可以看出，when和while在时间状语从句中的区别主要在于强调的重点不同。
当我们需要表示某个时间点或一段时间时，选用when；当我们需要表示动作正在进行或两个动作同时发生时，选用while。
When与while的区别
When与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。
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。
when; while 当……时候while能用when代替; 但是when却不一定能用while代替.while+从句, 动作一定会延续when+延续性动词/瞬间动词; when he arrivedwhen he diedwhen,while强调动作同时发生过去进行时:在过去的某一点时间, 或者是过去某一动作同时发生的另外一个动作瞬间动词(arrive)无进行时态I am arriving 进行时态表示将要When he arrived,I was having dinner.同时发生的两个动作, 均用过去进行时When I was doing my homework,my mother was cooking.When my mother was doing the housework,my father was watching TV.同时发生的两个动作1.一个用一般过去时, 另一个用过去进行时2.分工的情况, 均用过去进行时When the plane arrived,...were waiting inside the main buildingwhile others were waiting on...While......were keeping guard at the door,two others opened the parcel.表面上是分工, 两个动作同时发生, 不是同时开始同时结束, 延续时间不一致,长一点时间的动作用进行时态, 短时间的动作用过去时.When someone knocked at the door,I was having dinner.when和while引导的时间状语从句与这一时态连用。
when和while的用法和区别演示教学
when和while的用法和区别while和when都是表示同时，到底句子中是用when还是while主要看从句和主句中所使用的动词是短暂性动作（瞬时动词）还是持续性动作。
1、若主句表示的是一个短暂性的动作，而从句表示的是一个持续性动作时，两者都可用。
如：He fell asleep when [while] he was reading. 他看书时睡着了。
I met him when [while] I was taking a walk in the park. 我在公园散步时遇到了他。
2、若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用while。
如：Don’t talk while you’re eating. 吃饭时不要说话。
I kept silent while he was writing. 在他写的时候，我默不作声。
3、若从句是一个短暂性动作，而主句是一个持续性动作，可以when 但不用while。
如：When he came in, I was listening to the radio. 他进来时，我在听收音机。
It was raining hard when we arrived. 我们到达时正下着大雨。
4、若主、从句表示的是两个同时(或几乎同时)发生的短暂性动作，一般要用when。
如：I thought of it just when you opened your mouth. 就在你要说的时候，我也想到了。
至于什么是短暂性动作，什么是持续性动作，其实有个很简单的规律。
就是如果是进行时态，一般是持续性的。
如果是过去式，一般是短暂性动作。
对于，填写when还是while的问题，通常首先看主句和从句中的时态，再根据以上4个规律来判断填写那个单词。
When和While的区别通常when 后面接一般过去时while 后面接过去进行时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。
最新unit3-When和while引导的时间状语从句教学讲义PPT
⑤特发性羊水过多：原因不明， 孕妇、胎儿及胎盘均无异常
2．羊水过少（oligohydramnios） 妊娠晚期羊水量＜300ml ①胎儿畸型：胎儿先天肾缺如、 双肾发育不全、尿道闭锁 ②过期妊娠：胎盘功能减退 ③胎儿宫内发育迟缓
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unit3-When和while引导 的时间状语从句
过去进行时的概念及构成
概念：表示过去某一时刻或某段时间正在进行 的动作
构成：主语+was/were+doing sth+时间状语
指示词：then、 at that time、once等连用，或 者用另一动作来表示过去的时间。
When与while引导的时间状语从句
2.While总是指一个时间段，从句中必须用 延续性动词。
3.统一时态：主句过去式，从句也是过去 式。
Exercises: fill with “while” or “when”
1. While May was talking on the phone,her sister walked in
2. When Rita bought her new dog,it was wearing a little coat.
3. When I saw Carlos , he was singing louldly. 4. While I was dancing , he was singing louldly. 5. When Linda finally saw David, he was
jumping with a dog. 6. I was cleaning my room When the fire broke
When 、while引导的时间状语从句
• 2. ---Why did the car hit the boy? （2015天津中考） ---Because the driver __C____ on the phone at that time.
A. talkຫໍສະໝຸດ B. is talking
C. was talking D. have talked
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。例：
• 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？
• ①As the time went on，the weather got worse．（as表示“随 着……”之意）
• ②The atmosphere gets thinner and thinner as the height increases．随着高度的增加，大气越来越稀薄。
• ③As years go by，China is getting stronger and richer．随着时间 一年一年过去，中国变得越来越富强了。
如:two years ago; at 5 o'clock; 例:He died 5 years ago. • 否定的终止性动词可以与表示时间段的时间状语连用。 例:I haven't left here for 3 years. I haven't heard from him for 3 weeks.
D. was shoping
THANK YOU
• 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。
Module8过去进行时及whenwhile引导的过去时间的状语从句区别课件英语八年级上册(完整版)
when 也可“在……时期”，它可兼指“时间点”与“时间段”，
所引导的从句的动词既可以是终止性动词，也可是持续性动词。
当...的时候
They were drawing a tiger when the teacher came in.
延续性的动作
短暂性的动作
The teacher came in when they were drawing a tiger.
while 只指"时间段"，不指"时间点"，从句的动词只限于持续性动词。
My aunt was watching TV last night, while my uncle was playing games.
延续性的动作
延续性的动作
主句：过去进行时
从句：一般过去时
We were talking when the teacher came in. (强调老师突然进来） （When the teacher came in ,we were talking .）
while
说明一个动作正在进行的同时，另一个动作也在进行，强调两个动作同时性
They were singing while we were dancing . (强调唱歌跳舞同时发生）
区别2 搭配的 时间不同+ 动词不同
When后可长亦可短，while之后只能长 若是两个都为长， while 来把纽带当
当……的时候 （was/were+v-ing)
While 当……的时候
一般过去时 （v-ed)
While 同时
过去进行时 （was/were+v-ing)
从句 一般过去时（v-ed)
when与while的在状语从句区别和用法(一)
when与while的在状语从句区别和用法(一)When与While的区别和用法基本区别•When和while都可以引导时间状语从句，表示一个动作或事件发生的时间。
•When表示“当……的时候”，while表示“在……的时候”。
•When引导的时间状语从句一般提供背景信息，描述一个已经发生或将要发生的事件。
•While引导的时间状语从句一般用于描述与主句同时发生的事件。
When的用法1. 表示单个动作或事件的时间•主句一般使用延续性动词。
•When引导的时间状语从句可以放在主句之前或之后。
•例如：–When I arrived at the station, the train hadalready left.–I was working on my computer when the powersuddenly went out.2. 表示经常性的动作或事件•主句一般使用一般现在时。
•例如：–When it rains, I usually stay at home.–I always feel sleepy when I study late at night.3. 表示状态的时间•主句一般使用非延续性动词。
•例如：–She was very tired when she woke up.–When he heard the news, he was overjoyed.While的用法1. 表示同时发生的动作或事件•主句和时间状语从句之间的动作或事件在时间上重叠。
•例如：–While I was cooking dinner, my friend called me.–She was reading a book while waiting for the bus.2. 表示递进关系•常用于含有递进关系的复合句中。
•常与“on the one hand…on the other hand”或“however”等连词连用。
外研版八年级时间状语从句when and while区别课件(共25张)
When and While
Simple Past Tense and
Past Continuous Tense
Past Tense
Simple Past Tense describes something that happened in the past.
Using when:
1. When is a conjunction used to join two sentences. 2. When comes at the beginning or in the middle of a
sentence. 3. When is used to join two actions; one was going on at
sentence. 3. While is used with the long progressive action(past
continuous tense).
4. Use while when you were doing 2 continuous actions
at the same time.
painting the walls.
Practice:
1. The girl was dancing __w_h_i_le__ the boy was singing. 2. _W__h_i_le___ we were playing on the playground, David was cleaning the classroom . 3. __W_h__ile___I was working , my dog was eating my socks. 4. _W__h_i_le_ Ben was reading a book, his brother was playing . 5. While Dad was sleeping, our cat __w_a_s_c_a_t_c_h_in_g_(catch) birds in the garden. 6. Mother was sweeping the floor while I _w_a_s_c_l_e_a_n_in_g__(clean) the window.
when 和while
When\while的区别1. when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。
2. when 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.4. when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）、when，while都有“当……时候”的意思。
when既可表示某一点时间，也可以表示某一段时间。
在when引导的时间状语从句中，其谓语动词可以是延续性的，也可以是非延续性的，可与主句中的谓语动词同时发生，也可在其后发生。
例如：1、I was just reading a book when she came into my room. 她走进我房间时，我正在看书。
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（二）用法 1. 表示过去某一时刻或某一段时间
正在进行或发生的动作。与过去某一特 定的时间状语连用，常见的有：at 3
o’clock yesterday afternoon, in those days, at this time yesterday等。
2. 表示过去一个动作发生时，另一 个动作正在进行，持续时间长的动作用 过去进行时，常用在while引导的时间状 语从句中。
2. She was babysitting her sister at this time yesterday. （改为一般疑问句） _W__a_s__ she _b_a_b_y_s_it_ti_n_g__ her sister at this time yesterday?
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3. They were having a party when I knocked at the door. （就划线部分提问） _W__h_a_t_ _w__er_e__ they _d_o_i_n_g_ when you knocked at the door?
It was snowing when we got to the airport. 我们到达机场时, 天正下着雪。
My key dropped on the ground when I was walking in the park. 我在公园散步时, 钥匙掉在了地上。
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while
while引导的时间状语从句常指一个时间 段,从句中的动词必须为延续性动词。 while有时还可表示主句的动作与从句 的动作同时发生。
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3. I was sleeping _w_h__en__ my cousin came to see me.
4. My mother was doing the housework _w__h_il_e_ I was doing my homework.
5. _W__h_il_e_ the alien was in the shop, the girl called the police.
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Ⅲ. 用when或while填空 1. What were you doing _w_h_e_n__ the earthquake happened? 2. _W__h_il_e_ I was shopping in the supermarket, I met my friend Nancy.
5. He said he was _le_a_v_i_n_g (leave) for Shanghai soon.
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Ⅱ. 句型转换 1. Kate was drawing pictures when her mother came back. （改为否定句） Kate _w_a_s_n_’_t _d__ra_w__in__g_ pictures when her mother came back.
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when and while
Both of them mean ”当…… 的时候”.
Are they the same? No ！！！
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when
when引导的时间状语从句可以表示一个时间 点,也可以表示一个时间段。从句中可以用
短暂性动词,也可以用延续性动词。从句中 的动作既可与主句的动作同时发生， 又可在主句的动作之前或之后发生。
2. when 说明从句的动作各主句的动作可 以是同时发生，也可以是先后发生， while则强调主句的动作在从句动作的发 生过程中发生或者主从句动作同时发生 。
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tips:
1. 通常情况下when能替代while, 但 while不能替代when.
2. 当从句和主句都用过去进行时的时 候，多用while引导。
While he was reading, the phone rang. 他正在看书时, 电话铃响了。
Some students were reading while
others were writing. 一些学生在读书, 另一些学生在写字。
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tips:
1. 当时间状语从句中的动作与主句中的动 作同时发生，且从句动作为延续性动词 时，when 与while都可以使用。
2013年版英语八下Unit5 过去进行时
与when、while
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过去进行时
（一）含义及构成
过去进行时表示过去某一时刻或某一 段时间正在进行或发生的动作，其结构为： was / were + v. –ing。
I/He/She/It was +v-ing… (第一三人称单 数用was) We/You/They +v-ing…
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Байду номын сангаас
（1）过去进行时的否定句结构为：was / were+ not +v. -ing ，was与not常缩写为 wasn’t，were与not常缩写为weren’t。
（2）过去进行时的一般疑问句结构为： Was / Were +主语+ v. -ing+其他？
（3）过去进行时的特殊疑问句结构为： 疑问词+ was / were+主语+v. -ing+其他？
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(2009四川泸州) What were you doing
_____ Zhang Fan came in?
A. when
B. while C. where
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3. They w__e_r_e_t_a_lk_i_n_g_ (talk) about the film when the teacher came in.
4. While he _w_a_s_w__a_it_in__g (wait) for the bus, he read a newspaper.
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过去进行时的用法
Ⅰ. 用所给词的适当形式填空 1. I _w_a_s_h__el_p_i_n_g (help) my mother with housework at ten o’clock last Sunday.
2. The girl _w__a_s_h_a_v_i_n_g__ (have) a piano lesson at this time yesterday.