when和while区别及专项练习---含答案

While&when在⾼考试题中的考查2019-08-01⼀、⼆者的区别1、when做并列连词⽤时，构成并列句，意为“就在这时，恰恰在这时”不可以⽤其他词代替。

多⽤于下列句型中：1）be+表⽰状态的介词短语+when…“在做某事，就在这时……”2）bedoingsth.+when…“正在做某事，就在这时……”3）beabouttodosth.When…“正要做某事，就在这时……”4）had（not）done…when…“刚……就……”2、when做从属连词时，连接时间状语从句。

这时要注意when与while和as引导的时间状语从句的区别：1）when，while，as都可以跟持续动词，表⽰⼀段时间，这⼀点俩跟着⽤法相似，但when也可以接⾮延续动词，⽽while可以。

2）when，while后⾯的主语如果与主句的主语⼀致，谓语含有be动词，经常采⽤倒装的形式但when后经常⽤过去分词或现在分词，⽽while后经常跟介词短语。

3）while也可以做并列连词，表⽰两者之间的⽐较，意思是“然⽽”when⽆此⽤法。

4）when除表⽰时间外，也可以暗含某种条件，相当于if，⽽while⽆此⽤法。

5）as引导时间状语从句时，多表⽰主从句的谓语的动作相伴随⽽发⽣，强调发⽣过程，因此经常翻译为“⼀边，⼀边”“随着”有时也可与瞬间动词连⽤，表⽰“正当……的时候”。

Eg.①Wewereatworkthatafternoonwhensuddenlyafirebrokeout.②Wewerehavingameetingwhensomeonebrokeinangrily.③Iwasabouttogooutwhensomeoneknockedatthedoor.④Wehadjustbeguntoworkwhenthemachinebrokendown.⑤Whenaskedwhyhehadn'tfinishedhishomework，theboykeptsilent.⑥Whenthereisnowaterorair，therewillbenolifeontheearth.⑦Mikeisveryweakwhilehisbrotherisverystrong.⑧Astheheightincreases，temperaturefalls；thechildrenwereplayingfootballhappilyonthegroundwhenitbegantorainheavily.while做并列连词时表转折，对⽐，意为“⽽”此时，⼀般位于句中。

when和while的用法解析、练习题及答案（附总结表格）一、讲解三例句:1. The girls are dancing while the boys are singing.2. Lucy’s mother is cooking when she gets home.3. When/While Lucy’s mother is cooking, she gets home.二、用when或者while填空1.______ Margo was talking on the phone, her sister walked in.2.______ we visited the school, the children were playing games.3.______ Sarah was at the barber’s, I was going to class.4.______ I saw Carlos, he was wearing a green shirt.5.______ Allen was cleaning his room, the phone rang.6.______ Rita bought her new dog; it was wearing a little coat.7. He was driving along ________ suddenly a woman appeared.8. _____ Jake was waiting at the door, an old woman called to him.9. ______ it began to rain, they were playing chess. 10. She saw a taxi coming ______ the woman was waiting under the streetlight.三、语法while和when都是表示同时，到底句子中是用when还是while主要看主句和从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。

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。

when, while和as的区别及练习使用when的情况:1.两个短暂性动作同时发生或接连发生时：I took off my shoes when I got home. 我一回到家，就把鞋子给脱掉了。

I picked up the phone when it rang. 当电话响的时候，我就接起了电话。

2.经常与年龄连用When I was 28 years old, I was working in New York.3.可以与延续性和短暂性动词连用Lily was sleeping when he called. 他电话来的时候，Lily正在睡觉。

He called when Lily was sleeping. Lily正在睡觉的时候，他打电话进来。

使用while的情况：1.当主句和从句都为进行时，指两个动作动作同时I was watching TV while my father was sleeping.我在看电视，我的爸爸在睡觉。

2.While 后面可以跟延续性动词，不能能短暂性动词。

He called while Lily was sleeping. Lily正在睡觉的时候，他打电话进来。

3.while 还可以表示然而，但是He is clever while he is very lazy. 他很聪明，但是很懒。

使用as的情况:1.As后面跟延续性动词He went back as his mother was cooking. 当他妈妈正在煮饭的时候，他回来了。

2.As 可以引导让步状语从句，但要倒装Child as he is, he is popular with a lot of people. 尽管他是小孩，但是他受很多人的欢迎与喜爱。

Try as he might, he still couldn’t make progress. 尽管他也尝试了，但是他仍然没有获得进步。

while与when区别练习when与while的区别一、选词填空1.What’s wrong?You look so (tire,tired,tiring).2.This coat is (nice,nicely)and seems very (expensive,expensively).3.It’s (bored,boring)to do the same thing every day.4.This car isn’t (safe,safely)to drive.5.Mum got (angry,angrily)because Tom came home very late.6.His idea sounds (good,well).二、根据汉语意思完成句子，没空一词。

1.这道菜尝起来很美味。

The dish .2.这辆小汽车很贵。

The car .3.这个漂亮的女孩会弹钢琴。

Can play the piano.4.这首歌很难唱好。

Thie song is very .5.在大街上踢足球很危险。

It is very football in the street.6.她有着圆圆的脸和又大又黑的眼睛。

She has a and .7.天黑以后单独出门是危险的。

It’s out alone afer dark.8.我们发现在这个村庄几乎不可能买到汽油。

We found it almost petrol in this village.9.这蛋糕很容易做。

This cake is .10.莉莉今天看起来很开心。

Lily today.三、选择题1.I have to do today.A.anything importantB.something importantC.important nothingD. important something2.Tony is going camping with boys.A.little two otherB.two little otherC.two other littleD.little other two3.-Tom looks .What’s wrong with him?-He lost his job yesterday.A.sadB.sadlyC.happyD.happily4.Julia is not so as Linda.Linda is the tallest girl in our class.A.tallerB.tallC.shorterD.short5.Mike is enough to move the heavy stone out of the road.A.strongB.strongerC.much strongerD.strongest6.The English passage is to understand because there arenew words.A.difficult;muchB.difficulty;fewC.difficult;manyD.difficulty;little7.The twins are together most of the time,so they never feel .A.friendlyB.tiredC.safeD.lonely一、把下面的直接引语改为间接引语1.“I never eat meat.”he explained.2.Tom asked,“When will the Teenagers’ Film Week start?”3.He said to me,“I have left my book in your room.”4.She added, “Have you got the ticket for Wall-E?”5.He asked, “Are you sure your mother will come?”6. “Will you be here tomorrow?”he asked me.7.He said, “I’m reviewing my lesson.”8.Jack said to her, “Where did you spend your holiday?”9.He said to me, “Don’t do that again.”10. “Light travels much faster than sound.”Everybody in our class knew.二、选择题1.He said, “I am living with my brother.”→He said that _______ was living with his brother.A.IB.youC.heD.they2. He said, “You are sure to get a warm welcome here.”→He said that we_______ sure to get a warm welcome there.A.amB.wasC.wereD.are3.The teacher asked, “Has she read enough this week?”→The teacher asked _______read enough ________ week.A.if she had,thatB.whether she has,thisC.if had she,thatD.whether has she,this4.He said, “Do I have anything to do with her.”→He asked _______ anything to do with ________ .。

(完整word版)when和while区别练习when、while 指引时间状语从句时的差别练习题用 when 或许 while 填空1.______ Margo was talking on the phone, her sister walked in.2.______ we visited the school, the children were playing games.3.______ Sarah was at the barber's,I was going to class.4.______ I saw Carlos,he was wearing a green shirt.5.______ Allen was cleaning his room,the phone rang.6._____ Jake was waiting at the door, an old woman called to him.7.______ it began to rain, they were playing chess.8.She saw a taxi coming ______ the woman was waiting under the streetlight.9.The boy was walking down the street a UFO landed.10. _______ the alien was visiting the museum,the boy called the TV station.用所给动词适合形式填空1.While Jake ___________________(look) for customers, he ____________(see) a woman.2.They __________________(play) football on the playground when it ________(begin) to rain.3.A strange box _______________(arrive) while we _________________________ (talk).4.John _____________________________(sleep) when someone ____________(steal) his car.5.Father __________still_____________ (sleep)when I _________(get)up yesterday morning.6.Grandma ______________(cook) breakfast while I_____________(wash) my face this morning.7.Mother______________________(sweep)the floor when I_____________ (leave)home.8.I _________________(read) a history book when someone_____________ (knock) at the door.9.Mary and Alice are busy_____________(do)their homework.10.The students ____________(play)basketball on the playground from 3 to 4 yesterday afernoon.达成下边句子，一空一词1.飞机在伦敦腾飞时正在下雨。

过去进行时中“when和while讲解与练习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+yesterda y (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,as练习题及答案when, while 和 as 引导时间状语从句的用法这三个词的意思很简单，都有“当??时候”的意思, 但又有区别。

一、when 的用法观察下面的句子:1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。

2. When she came into my room, I was just readinga book. 她走进我房间时，我正在看书。

3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。

5. He was leaving when someone knocked at the door. 他正要走，这时有人敲门。

6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。

根据以上的例句，我们可以总结出一点：when 从句中的A事件，相当于主句中B事件发生的时间点。

也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when从句多数情况下用的是一般过去时，而不用进行时, 而且, when 从句的动词大多是短暂性动词。

这种说法也可以参照。

实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。

例如：When the manager comes here for a visit next week, I’ll talk with him about this.下周，经理来这参观时，我会和他谈谈此事。

When的特殊用法：主句when 从句I was walking along the street when a ball hit me on the head.我正沿着路边着，就在这时一个球打在了头上。

(三)when, while区别以及过去进行时语法：1.连词when 和while的用法。

（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，两者都可以用。

He fell asleep when / while he was reading.（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。

Don’t talk while you’re eating.（3）若从句是一个短暂性动作，主句是一个持续性动作，则用when而不用while。

It was raining hard when we arrived.（4）when 可作并列连词，表示“这时（突然）”；while也可以用作并列连词，表示“然而；却（对比）”。

We were about to start when it began to rain. 我们正要出发，这时天开始下雨了。

He likes coffee, while she likes tea. 他喜欢咖啡，而她却喜欢茶。

2.过去进行时。

(1)定义：表示过去某个具体时刻正在进行的事情或动作。

(2)结构: was / were + doing (现在分词)(3)用法①：表示过去某段时间内持续进行的动作或事情。

We were watching TV from seven to nine last night.②表示在过去某个时间点发生的事情。

What was she doing at nine o’clock yesterday?专项练习：一、选择题。

（）1.Tom rushed into the house his mother was cooking.A. asB. beforeC. whileD. after（）2. -----Mom, shall we have supper now?-----Oh, we won’t have supper your dad comes back.A. untilB. sinceC. whileD. after（）3.-----Tom, you look tired this morning. What’s wrong?-----I was so busy that I didn’t go to bed 12 o’clock last night.A. untilB. whenC. thoughD. unless（）4. Jack likes reading a newspaper he is having breakfast.A. andB. whileC. because（）5. -----Ring me up you come to my house, will you?-----Sure, I will.A. thoughB. whileC. beforeD. until（）6. Eddie was sleeping Millie was reading a magazine.A. untilB. whileC. beforeD. after（）7. the 632-meter Shanghai Tower is finished, it will be the second tallest building in the world.A. WhenB. SinceC. BeforeD. Unless（）8.Mary a dress when she cut her finger.A. madeB. is makingC. was makingD. makes （）9. When Jim’s mother came in, he his homework.A. is doingB. has doneC. was doing（）10. -----What did you do yesterday evening, Gina?-----I Titanic 3D in the City Cinema.A. watchB. watchedC. am watchingD. will watch （）11. Paul and I tennis yesterday. He did much better than I.A. playB. will playC. playedD. are playing（）12. -----I call you at 6 o’clock yesterday evening, but nobody answered.-----I’m sorry. I my friend downloaded the movie Kung Fu Panda 2 when the telephone rang.A. would helpB. helpedC. was helping（）13. Yesterday evening, I along the street when I suddenly met my math teacher.A. walkB. walkedC. was walkingD. am walking（）14. The girl with two cats in the yard when the earthquake happened.A. was playingB. is playingC. are playingD. were playing（）15. -----What did Mr. Smith do before he came to China?-----He in a car factory.A. workedB. worksC. is workingD. will work综合练习：一、完形填空。

when和while的用法区别第一篇：when 和while的用法区别when 和while的用法区别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，as引导时间状语从句的区别when，while，as显然都可以引导时间状语从句，但用法区别非常大。

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。

讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkang’s mother is cooking when he gets home.3. When/While Kangkang’s mother is cooking, he gets home.一、用when或者while填空1.______ Margo was talking on the phone,her sister walked in.2.______ we visited the school,the children were playing games.3.______ Sarah was at the barber’s, I was going to class.4.______ I saw Carlos, he was wearing a green shirt.5.______ Allen was cleaning his room, the phone rang.6.______ Rita bought her new dog;it was wearing a little coat.7. He was driving along ________ suddenly a woman appeared.8. _____ Jake was waiting at the door, an old woman calledto him.9. He was reading a book ______suddenly the telephone rang.10. ______ it began to rain, they were playing chess.11. She saw a taxi coming ______ the woman was waiting unde r the streetlight.12. The alien was in the museum, I called the police.13. The boy was walking down the street a UFO landed.14. The alien was visiting the museum,the boy called the TV station.15. I was cleaning my room the fire broke out.16. Linda shouted his name, some people looked at her.二、用所给动词适当形式填空17. While Jake __________ (look) for customers, he _______ (see) a woman.18. They __________(play) football on the playground when it _____(begin) to rain.19. A strange box ________ (arrive) while we _________ (talk).20. John ____________ (sleep) when someone __________ (steal) his car.21. Father still (sleep) when I (get) up yesterday morning.22.Grandma (cook) breakfast while I (wash) my face this morning.23. Mother (sweep) the floor when I (leave) home.24.I (read) a history book when someone (knock ) at the door.25. Mary and Alice are busy (do) their homework. 26.The teacher asked us27. I followed it28. The studentsbasketball on the playground yesterday afternoon.三、完成下面句子，词数不限1.飞机在伦敦起飞时正在下雨。

while和when的区别有哪些用法是什么when既可表示某一点时间，也可以表示某一段时间。

while只能表示某一段时间，不能表示某一点时间。

在while引导的时间状语从句中，其谓语动词只能是延续性的，而且也只能与主句中的谓语动词同时发生或存在。

while和when的区别1、侧重点不同when所引导的从句，其谓语动词既可是持续动词，也可是短暂动词；谓语动词动作发生的时间可以与主句谓语动词的动作是同时，或之前、之后。

while句中的谓语动词应为持续动词，不用短暂动词，谓语动作发生的时间通常与主句谓语动词动作发生时间是同时。

2、用法不同when引导的从句作“当…时”或“每逢…”解，从句中的动作既可以和主句中的动作同时发生，也可以在主句的动作之前或之后发生。

while引导的从句作“当…时”或“在…期间”解，它强调从句中的动作与主句中的动作同时发生，但持续时间一般较长或主句的动作在从句的动作过程中发生。

3、词源解说不同when直接源自古英语的hwenne，意为何时。

while直接源自古英语的hwile，意为一段时间；最初源自原始日耳曼语的khwilowhile和when的用法1、whilewhile用作连词时,表示“在…(过程)中,在…期间”。

常用来引导时间状语从句,当主句的主语和while 所引导的从句的主语一致时, while从句中的主语、谓语往往可以省去。

while还可引导让步状语从句,意思是“虽然,尽管”,含有对比意味。

2、whenwhen可用作从属连词,引导状语从句,表示时间时作“当…时,在…的时候”解; 表示条件时作“如果,要是”解; 表示对比时作“既然,考虑到”解。

当when所引导的从句的主语和主句的主语一致时,常将其主语、系动词或助动词省去,只留实义动词或表语,或者改写为短语。

时间状语从句讲解与练习when, while 和as 引导时间状语从句的用法这三个词的意思很简单，都有“当……时候”的意思, 但又有区别。

一、when 的用法观察下面的句子:1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。

2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。

3. Were you writing when the teacher came in? 老师进来的时候，你在写信吗？4. Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。

5. He was leaving when someone knocked at the door. 他正要走，这时有人敲门。

6. I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。

根据以上的例句，我们可以总结出一点：when 从句中的A事件，相当于主句中B事件发生的时间点。

也就是说，when 从句的重点不在动作本身发生的状态，而只是把它作为一个时间点，所以when从句多数情况下用的是一般过去时，而不用进行时, 而且, when 从句的动词大多是短暂性动词。

这种说法也可以参照。

实际上，when 从句也可以有其它的时态，但几乎也不用进行时，因为它也只是作为一个时间参照点。

例如：When the manager comes here for a visit next week, I’ll talk with him about this.下周，经理来这参观时，我会和他谈谈此事。

When的特殊用法：主句（进行时）when 从句（一般时）I was walking along the street when a ball hit me on the head.我正沿着路边着，就在这时一个球打在了头上。

when和while用法区别专项练习讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkang’s mother is cooking when he gets home.3. When/While Kangkang’s mother is cooking, he gets home.一、用when或者while填空1.______ Margo was talking on the phone,her sister walked in.2.______ we visited the school,the children were playing games.3.______ Sarah was at the barber’s,I was going to class.4.______ I saw Carlos, he was wearing a green shirt.5.______ Allen was cleaning his room, the phone rang.6.______ Rita bought her new dog;it was wearing a little coat.7.He was driving along ________ suddenly a woman appeared. 8. _____ Jake was waiting at the door, an old woman call ed to him.9.He was reading a book ______suddenly the telephone rang.10. ______ it began to rain, they were playing chess.二、用所给动词适当形式填空11. While Jake __________ (look) for customers, he _______ (see) a woman.12. They __________(play) football on the playground when it _____(begin) to rain.13. A strange box ________ (arrive) while we _________ (talk).14. John ____________ (sleep) when someone __________ (steal) his car.15. Father still (sleep) when I (get) up yesterday morning. 16.Grandma (cook) breakfast while I (wash) my face this morning.17. Mother (sweep) the floor when I (leave)home.18.I (read) a history book when someone (knock) at the door.19. Mary and Alice are busy (do)their homework.20.The teacher asked us (keep) the windows closed.21. I followed it (see) where it was going.22. The students (play) basketball on the playground from 3 to 4yesterday afternoon.三、完成下面句子，词数不限1.飞机在伦敦起飞时正在下雨。

（完整版）过去进行时when和while过去进行时的讲与练一、含义：(1)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。

(2) 过去进行时表示感情色彩与现在进行时相似，过去进行时也可表示满意、称赞、惊讶、厌恶等感情色彩，也通常与always，forever 等副词连用。

e.g：They were always quarrelling. 他们老是吵架。

二、过去进行时的构成和用法：肯定形式：主语+was/were+doing否定形式：主语+was not (wasn't)/were not (weren't)+doing 疑问形式：Was/Were+主语+doing。

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 和while引导的时间状语从句。

三、when/while引导的时间状语从句①由when/while 引导的时间状语从句。

常用句型：a. 主句（主语+ was/were + doing … when + 一般过去时的句子）；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。

We were talking when the teacher came in.=While we were talking, the teacher came in.b. 主句（主语+ was/were + doing … while +主语+ was/were + doing … ）；主句与从句的动作都是延续性动词或同时发生的，两句都用过去进行时的时候，多用while引导★★★注意：when和while的区别：都意为“当……时候”，when引导的句子谓语动词用短暂性动词或延续性动词都行；但while 引导的句子谓语动词只能用延续性动词，不能用短暂性动词。

写出下列单词的过去式形式Grow run fall mean tell take fly think复习英语中表达正在如何表达比如你正在做什么？我正在等车1指在某个具体的时刻某事某人正在做某事或者？什么是具体的时刻昨晚昨晚九点去年去年这个时候三年前当暴风雨来的时候当我看到他的时候当我离开的时候在那个时候翻译当暴风雨来的时候我正在洗淋浴当我离开的时候他正在看电视总结当......时候用的时态是后面主句用的时态是When的意思2当前一段时间正在进行的动作整个早上昨天昨天一天昨天晚上昨天从七点到九点昨天从七点到九点我们在看电视他昨天一天都在玩电脑游戏While 时间段当妈妈在煮饭的时候我在写作业当我在等汽车的时候，他在看报纸当我在写作业的时候我听到一个声音总结while 引导的句子都用时态主句可以是也可以是特殊用法有些动词不能表正在即现在进行时相信同意知道听到用when 和while进行填空1、I was just reading a book ______ she came into my room.2、______ he was a child he was always trying out new ideas.3.You can’t do your homework _______ you’re watching TV.4、_______ they were talking , the bell rang.5、I was watching TV _______ Peter came in.1.I ______ cooked a meal when you _____ me.a. cooked, were ringingb. was cooking, rangc. was cooking, were ringingd. cooked, rang2 He said he _____ to draw a plane on the blackboard at that time.a. triesb. triedc. was tryingd. will try3.While she ______ TV, she ______ a sound outside the room.A. was watching, was hearingB.watched, was hearingC. watched, heardD..was watching, heard4.They _____ a football game from 7 to 9 last nighta. were watchingb. watchc. watchedd. are watching5. What book ____ you ______ when I ____ you at four yesterday afternoon?a. did, read, was seeingb. did, read,c. were, reading, sawd. were, reading, was seeing6.It was Friday evening. Mr and Mrs. Green _____ ready to fly to England.a. are gettingb. getc. were gettingd. Got7. Lei Feng _____ always _____ of others when he ______ in the army.a. is, thinking, wasb. was, thinking, isc. did, think, isd. was, thinking, was8. A girl ______ my pen fall off the table when she _____ me.a. saw, passedb. was seeing, passedc. was seeing, passedd. was seeing, was passing 9. We ____ for tom at ten last Sunday. He often kept us ______.a. were waiting, waitingb. were waiting, waitc. waited, waitingd. waited, wait10.He ____ his father on the farm the whole afternoon last Saturday.a. helpsb. would helpc. was helpingd. is helping11.While mother _______ some washing, I _____ a kite for Kate.a. did, madeb. was doing, madec. was doing, was makingd. did, was making12.“_______ you angry then?”“they ______ too much noise.”a. are, were makingb. were, were makingc. are, maded. were, made 13. He ____ some cooking at that time, so _____ me a.did, heard b. did, didn‟t hear c. was doing, heard d. was doing, didn‟t hear14.This time yesterday jack _____ his bike. He _____ TVa. repaired, didn‟t watchb. was repairing, watchedc. repaired, watchedd. was repairing, wasn‟t watching15. His parents wanted to know how he _____ on with his new classmates.a. was gettingb. getsc. is gettingd. will get16.Eddie was sleeping ________Millie was reading a magazine .A untilB while C. before D after17. Were you in the supermarket _____you heard a strange sound ?A when B. while C. then D. which作业写一篇短文介绍你的家人昨晚八点时正在做什么。

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 是两个常见的引导时间状语从句的连词，它们的用法既有相似之处，也有一些明显的区别。

理解和掌握它们的用法对于准确表达时间和动作的关系至关重要。

首先，我们来看看 when 的用法。

When 既可以表示“在……时候”，指一个具体的时间点；也可以表示“每当……的时候”，强调一种习惯性的动作。

例如：“I was having dinner when the phone rang”（我正在吃晚饭时，电话响了。

）在这个句子中，“was having dinner”是一个持续性的动作，“the phone rang”是一个短暂性的动作，when 连接了这两个动作，表示在持续性动作进行的过程中，发生了短暂性的动作。

再比如：“When I get home, I always take a shower first”（每当我到家时，我总是先洗个澡。

）这里的 when 引导的是一个习惯性的动作。

接下来，我们说一说 while 的用法。

While 通常表示“在……期间；当……的时候”，强调某个动作正在进行的时间段。

比如：“While I was doing my homework, my sister was watching TV”（当我在做作业的时候，我妹妹在看电视。

）在这个句子中，“wasdoing my homework”和“was watching TV”都是持续性的动作，while 强调两个动作同时进行。

需要注意的是，while 引导的从句中，谓语动词通常是持续性动词。

那么，when 和 while 的区别主要体现在以下几个方面：第一，动作的性质不同。

When 既可以连接短暂性动作，也可以连接持续性动作；而 while 通常连接持续性动作。

例如：“He came in when I was sleeping”（我正在睡觉时他进来了。

状语从句练习易混引导词while, when, as的区别：1. when既可以指"时间点"，与瞬间动词连用，也可以指"时间段"，与延续性动词连用(=while)。

如：Whe n hecame in, his mother was cook ing.When (While) we were at school, we went to the library every day.While表示时间段，因此，while从句的谓语动词要用延续性动词。

如：Please don't talk so loud while others are worki ng.As与when用法相似，但着重强调主句动作与从句动作同时发生，有"随着... "或"一边 .... 一边.... "之意。

如：As you get older, you get more kno wledge随着年龄的增长，你获得的知识就越多。

2. Because,as,since的区别：Because用于表示直接原因，回答why提出的问题，语气最强；As用于说明原因，着重点在主句，常译成"由于"；si nee表示显然的或已知的理由或事实，常译成"既然"。

如：Water is very importa nt because we can't live without it.He did n't come yesterday as his mother was ill.ril do it for you since you are busy.3. such…that, so …that, so th引导结果状语从句的区别：such是形容词，修饰名词；so是副词，修饰形容词或副词。

其结构如下：1) such + a (n)+形容词+单数可数名词+that .........2) such+形容词+复数可数名词+that .........3) such +形容词+不可数名词+that 。

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。

一、用所给动词的适当形式填空1. Betty (watch) TV last night.2. The Shutes usually (have) supper at 6:30 .3. The boys (play football on the playground now.4. Lucy (leave) the classroom half an hour ago.5. It (snow) heavily when they left the station.6. she (fall) off the tree just now?7. It (rain) almost every day last month.8. ---where you (catch) the fish? ---I (catch) it in the river near the house.9. She (write) a letter to her friend last night. But I don't know whether she has finished it or not.二、选择最佳答案：1.She thought I was praising her child，_____，in fact，I was scolding him for his bad behaviors at school.A.whatB.whileC.so thatD.therefore2.I do every single bit of housework ____ my husband Bob just does the dishes now and then.(2004全国卷II35)A.whileB.sinceC.whenD.as3.______ it is expected that students come university with the ability to take a good set of notes，this is not always the case.A.WhenB.AsC.ForD.While4.We were swimming in the lake ___ suddenly the storm started.A.whenB.whileC.untilD.before。