英语人教版八年级下册when 和while 的用法

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when和while的用法

when和while的用法

(1) when表示“当……的时候”,从句中既可以用延续性动词,表示状态或时间段,也可以用非延续性动词,表示动作或时间点; while表示“当……的时候”、“在……期间”,从句中只能用延续性动词,表示状态或时间段。

例如:It was snowing when we arrived at the station.When he came in, we all stood up, smiling.I was very fat when / while I was a child.When / While she was typing, someone knocked at the door.(2)在when或while所引导的状语从句中,如果从句的主语和主句的主语相同,且动词又是be动词时,从句的主语和be动词往往可以省略。

例如:When / While (I was) walking along the street, I heard my name called.When / While (you’re) in trouble, turn to me for help.2. when和while都可以表示“尽管、虽然”,但when经常指描述的事实或结果事与愿违或出人意料,而while在语气上含有让步之意。

例如:The boy was watching TV when he should have gone to bed.虽然那孩子该睡觉了,但他还在看电视。

The old couple prefer walking when they might take a taxi.尽管可以坐出租车,那对老夫妇更愿意步行。

While I accept that he is not perfect, I do actually like the person.尽管我承认他并不完美,但我确实真地喜欢他这个人。

While he loves his students, he is very strict with them.虽然他爱他的学生,但对他们的要求也很严格。

英语人教版八年级下册when和while用法

英语人教版八年级下册when和while用法
when和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 ,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: a.While we were talking, the teacher came in. b. They were singing while we were dancing. 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. b.He is strong while his brother is weak.
中考链接: You can do it!
(2014北京中考) -----What were you doing when we were playing basketball yeserday afternoon? -----I ________the classroom. A. was cleaning B. have cleaned C. will clean D.clean

when和while的用法和区别

when和while的用法和区别

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。

人教版英语八年级下册Unit5易混点拨:when,while和as引导时间状语从句的用法

人教版英语八年级下册Unit5易混点拨:when,while和as引导时间状语从句的用法

易混点拨:when, while和as引导时间状语从句的用法一、when的用法如果只从现象来看,when从句用的最多的是一般过去时,而主句的时态没有限制,根据具体情况而定。

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。

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

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

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

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

I had hardly[scarcely] closed my eyes when someone knocked at the door. 我刚一闭上眼,就有人在敲门了。

根据以上的例句,我们可以总结出一点:when从句的A事件,相当于另一个事件B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多数情况下用的是一般过去时,则不用正在进行时。

因为如果用正在进行时,它表示的就是一段时间而不是一个时间点了。

根据这一点,有的文章补充说:when从句的动词大多是瞬时动词。

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 I got to the airport, the guests had left. 当我赶到飞机场时,客人们已经离开了。

英语人教版八年级下册while 和 when 的用法区别

英语人教版八年级下册while 和 when 的用法区别

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。

英语人教版八年级下册when和while的区别

英语人教版八年级下册when和while的区别

过去进行时态(when与while的区别)一、教学目标1.掌握when和while的用法2.学会区分when和while的不同二、教学重难点when和while的区别三、教学过程1.when的用法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。

●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。

2. while的用法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。

●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。

3.区别when和while(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。

(2)when 说明从句的动作和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。

注意:通常情况下when能替代while, 但while不能替代when.当从句和主句都用过去进行时的时候,多用while引导4.针对性练习(1). What were you doing ______ the earthquake happened?(2). ______ I was shopping in the supermarket, I met my friend Nancy. (3). I was sleeping ______ my cousin came to see me.(4). My mother was doing the housework ______ I was doing my homework.。

while和when语句的用法

while和when语句的用法

while和when语句的用法"While"和"When"都可以用作连接词,引导时间状语从句,但在使用上有一些区别。

1. "While"一般表示两个动作或事件在同时发生。

它可以引导一个时间段的从句,主要强调两个动作或事件的同时发生。

例如:- While I was watching TV, my phone rang.(当我正在看电视时,电话响了。

)- I saw him while I was walking to the store.(我正在走向商店的路上时看到了他。

)2. "When"表示一个事件或动作发生的具体时间点。

它引导的从句强调事件或动作发生的某个时间点。

例如:- I will call you when I arrive home.(我到家的时候会给你打电话。

)- When he arrived at the party, everyone cheered for him.(当他到达派对时,大家为他欢呼。

)此外,"While"还可以用作连词引导对比关系,表示两个相反或不同的情况。

例如:- She loves to swim, while her brother hates water.(她喜欢游泳,而她哥哥讨厌水。

)- While some people prefer hot weather, others enjoy the cold.(尽管有些人喜欢炎热的天气,但也有人喜欢寒冷的天气。

)。

初中英语:对比when与while引导的时间状语从句

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。

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when和while
when和while都可表示“当……的时候”,引导时间状语从句。

你知道两者在过去进行时中的用法有什么不同吗?
请仔细观察下面的例句,然后补全空格中的内容。

①I was walking to school when I saw a cat in a tree.
②When Sally arrived home, her mother was cleaning the house.
主句的动作是持续性的,而从句动作是短暂性的,此时用_______引导时间状语从句,主句用_____________时态,从句用一般过去时态。

③While I was sleeping in the bedroom, someone knocked at the door.
④David fell while he was riding his bike.
主句的动作是短暂性的,从句的动作是持续性的,此时用_________引导从句,主句用____________时态,从句用过去进行时态。

⑤While Andy was waiting for the bus, he was reading a newspaper.
⑥He was cleaning his car while I was cooking.
主句和从句的动作在过去的某时刻或某段时间同时发生,而且动作都是持续性的,此时用_________引导从句,而且主句和从句都用_____________
时态。

练习:用when 和while 填空
1. We were singing __________ the teacher came in.
2. _________ I was doing my homework , my mother was cooking.
3. What were you doing _________ the rainstorm came ?
4. ________ I was waiting for the bus at the bus station, it began to rain.
5. ________ he woke up, the smoke was rising.。

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