延续性动词和非延续性动词以及when_while的用法和区别
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。
英语单词while和when的用法与区别

英语单词while和when的用法与区别while和when这两个单词我们就用的多了,那么你们有区分出他们的不同之处吗?下面,小编在这给大家带来英语单词while和when 的用法与区别,欢迎大家借鉴参考!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。
延续性动词和非延续性动词以及when-while的用法和区别

when和while引导的时间状语从句与这一时态连用。
所以区别when和while的用法成了这一单元的难点。
(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。
2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗?3、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。
(二)、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。
例如:1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。
2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
例如:1、While they were talking , the bell rang. 正在他们谈话的时候,上课铃响了。
2、I was doing my homework when my mother came back home yesterday evening. 昨天晚上妈妈回家的时候一、延续性动词和终止性动词的概念英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。
中考英语when和while的用法和区别

中考英语when和while的用法和区别when和while的区别一:when 当......之时(时间点),后接短暂性瞬间动词when在.....期间(时间段),后接延续性动词while在......期间(时间段),后接延续性动词因此,when可后接短暂性或延续性动词,而while只能接延续性动词。
后接短暂性终止性瞬间动词时,常用when,不用while;后接延续性动词时,when和while 常可替换使用;I was reading when you came in.当你进来的时候,我正在看书。
came是短暂性动词,此处when不能用while代替You came in while I was reading.= You came in when I was reading.read是延续性动词,此处when可用while代替when和while的区别二:1.表示正在做某事的期间,发生了意料之外的另一个短暂的动作,要对比这两件事,常用:主句(过去进行时-持续性动词),when从句(一般过去时-短暂性动词)We were playing games happily when we heard a cry.我们正在高兴地玩游戏的时候,(突然)听见了一声大叫。
2.若主句和从句的动作都比较长,表示同时发生,更常用while,此时可用进行时态或一般时态He waited in the car while l was in the shop.当我在店里的时候,他在车里等着。
He was watching TV while I was writing.当我在写作的时候,他正在看电视。
when和while的区别三:1.when可表示表示某个动作发生结束后紧接发生另一个动作,而while则不可When the bell rang, John went out of the classroom.铃声响后,约翰走出教室。
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。
when和while都可以表示“当…时”,用法上有何区别?

when和while都可以表示“当…时”,用法上有何区别?这个问题也是很多人平时会问我的,今天就做个了断:最大一个区别就是:当when 和while都可以表示“当…时”,但 when 后面的动词可以是延续性动词或非延续性动词,但 while 后面的动词必须是延续性动词。
顺便补充一下:①延续性动词是指表示能够延续的动作。
如:study, work, stand, lie, know, walk, keep, live,have, wait, watch, sing, read, sleep,stay 等。
②非延续性动词又称“瞬间动词”,表示不能延续的动作,这种动作发生后立即结束。
如:open, die, close, begin, finish, come, go, move, borrow, lend, buy,arrive等所以,当从句的动词为延续性动词时,when 可与 while 互换。
比如:I missed my home very much when I was abroad.我在国外时很想家。
这句话中的 when 可以替换为 while,因为 was abroad 是延续性动词(表达一种长期的状态)。
但在这句话中,情况就不同了:When I came home, my mom was cooking dinner.当我回家时,我妈妈正在做晚餐。
When 从句中,came 是非延续性动词,所以不能用while 来代替 when。
when 和 while 的另一种差异是:当when 后面的动作往往是一般过去时,那么when = after,when 从句动作早于主句动作,比如:I found a shelter when it began to rain.下雨后,我找到一个避雨的地方。
主句动词 found 发生在 when 从句动词 began to rain 之后。
再如:When the meeting ended, people left the room.会议结束后,大家走出房间。
when-和while的用法区别学习资料

w h e n-和w h i l e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。
when的用法

when的用法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. 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.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.具体你可以参考这一段.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.① Why do you want a new job when youve got sucha 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.④ The 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.②When I got to the airport,the guests had left.(got to后发生)当我赶到飞机场时,客人们已经离开了.2.从句动作和主句动作同时发生,且从句动作为延续性动词时,when,while,as都可使用.①When /While /As we were dancing,a stranger came in.(dance为延续性动词)当我们跳舞时,一位陌生人走了进来.②When /While /As she was making a phonecall,I was writing a letter.(make为延续性动词)当她在打电话时,我正在写信.3.当主句、从句动作同时进行,从句动作的时间概念淡化,而主要表示主句动作发生的背景或条件时,只能用 as.这时,as常表示“随着……”;“一边……,一边……”之意.① As the time went on,the weather got worse.(as表示“随着……”之意)② The 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.④The little girls sang as they went.小姑娘们一边走,一边唱.⑤The sad mother sat on the roadside,shoutingas she was crying.伤心的妈妈坐在路边,边哭边叫.4.在将来时从句中,常用when,且从句须用一般时代替将来时.①You shall borrow the book when I have finished reading it.在我读完这本书后,你可以借阅.②When the manager comes here for a visit next week,Ill talk with him about this.下周,经理来这参观时,我会和他谈谈此事.三、when用于表示“一……就……”的句型中(指过去的事情).sb.had hardly(=scarcely) done sth.when...=Hardly / Scarcely had sb.done sth.when...①I had hardly /scarcely closed my eyes when someone knocked at the door.=Hardly /Scarcely had I closed my eyes when someone knocked at the door.我刚一闭上眼,就有人在敲门了.②I had hardly /scarcely entered my room when the telephone rang.=Hardly /Scarcely had I entered my room when the telephone rang.我刚一走进房门,电话就响了.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.具体你可以参考这一段.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.① Why do you want a new job when youve got sucha 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.④ The 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.②When I got to the airport,the guests had left.(got to后发生)当我赶到飞机场时,客人们已经离开了.2.从句动作和主句动作同时发生,且从句动作为延续性动词时,when,while,as都可使用.①When /While /As we were dancing,a stranger came in.(dance为延续性动词)当我们跳舞时,一位陌生人走了进来.②When /While /As she was making a phonecall,I was writing a letter.(make为延续性动词)当她在打电话时,我正在写信.3.当主句、从句动作同时进行,从句动作的时间概念淡化,而主要表示主句动作发生的背景或条件时,只能用 as.这时,as常表示“随着……”;“一边……,一边……”之意.① As the time went on,the weather gotworse.(as表示“随着……”之意)② The 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.④The little girls sang as they went.小姑娘们一边走,一边唱.⑤The sad mother sat on the roadside,shouting as she was crying.伤心的妈妈坐在路边,边哭边叫.4.在将来时从句中,常用when,且从句须用一般时代替将来时.①You shall borrow the book when I have finished reading it.在我读完这本书后,你可以借阅.②When the manager comes here for a visit next week,Ill talk with him about this.下周,经理来这参观时,我会和他谈谈此事.三、when用于表示“一……就……”的句型中(指过去的事情).sb.had hardly(=scarcely) done sth.when...=Hardly / Scarcely had sb.done sth.when...①I had hardly /scarcely closed my eyes when someone knocked at the door.=Hardly /Scarcely had I closed my eyes when someone knocked at the door.我刚一闭上眼,就有人在敲门了.②I had hardly /scarcely entered my room when the telephone rang.=Hardly /Scarcely had I entered my room when the telephone rang.我刚一走进房门,电话就响了.。
when和while区别

0when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。
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。
具体你可以参考这一段。
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。
①Why do you want a new job when youve 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。
When__while__as的区别和用法

When, while, as持续性动词:可以表示持续的行为或状态的动词,叫做“延续性动词”短暂性动词:也称终止性动词,非延续性动词或瞬间动词,表示动作不能延续,只是一瞬间就结束的动作。
常见的短暂性动词有:come, go, arrive, reach, see, hear, close, open, leave, begin, start, buy, fall, join, die, become, borrow, get up, put on,当主句是一个短暂性动作,而从句是一个持续性动作,此时三者都可用。
如:Jim hurt his arm while[when,as]he was playing tennis.吉姆打网球时把手臂扭伤了。
As[When,While]she was waiting for the train,she became very impatient.她在等火车时,变得很不耐烦。
when(1) 表示“每当…的时候”(暗示一种规律性),一般要用when:It’s cold when it snows. 下雪时天冷。
He smiles when you praise him. 你夸奖他时他总是笑笑。
(2) 若主从句所表示的动作不是同时发生,而是有先后顺序时,一般要用when:I will go home when he comes back. 他回来时,我就回家去。
(3) when 可用作并列连词,表示“这时(突然)”;We were about to start when it began to rain. 我们正要出发,这时天开始下雨了。
(4) when用于表示“一……就……”的句型中(指过去的事情)sb.had hardly(=scarcely)done sth.when...=Hardly /Scarcely had sb.done sth.when...①I had hardly /scarcely closed my eyes when someone knocked at the door.=Hardly /Scarcely had I closed my eyes when someone knocked at the door.我刚一闭上眼,就有人在敲门了。
when和while的区别口诀初中

when和while的区别如下:
1、从句中用法区别。
while引导的从句只能用延续性动词,而when引导的从句可以用延续性动词也可以用非延续性动词。
2、从句时态的区别。
when引导的从句动作和主句动作可以同时发生或在之后发生,while只能同时发生或存在。
3、具体含义的区别。
when是既指时间点,也可指一段时间,while是during the time that,只指一段时间。
时间状语从句:
由when,while引导,用表示时间的连词连接一个句子作状语,这样的主从复合句就是时间状语从句。
在复合句中,担任状语成分的从句称为状语从句。
时间状语从句说明主句动作发生或进行的时间。
状语从句由连词引导,其位置通常可以放在句首或句末。
放在句首时,常用逗号与主句分开;放在句末时,从句前面往往不加逗号。
when和while

when和while引导的时间状语从句与这一时态连用。
所以区别when和while的用法成了这一单元的难点。
(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。
2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗?3、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。
(二)、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。
例如:1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。
2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
例如:1、While they were talking , the bell rang. 正在他们谈话的时候,上课铃响了。
2、I was doing my homework when my mother came back home yesterday evening. 昨天晚上妈妈回家的时候,我正在做家庭作1.when既指时间点,也可指一段时间2.while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。
when和while的用法区别(延续性动词和非延续性动词)

when和while的用法区别(延续性动词和非延续性动词)Dialogue:--How time flies! Do you remember the last Spring Festival?--Yes, I do. It happened just like yesterday.--Me too.--What were you doing when the bell rang on New Year’s Eve.--I was watching the Spring Festival Gala(春晚) on TV when the bell rang.--What about you?--While you were watching the Spring Festival Gala, I was watching fireworks.--It was really a memorable night.Q:在对话中,when和while表达的意思一样吗?有何异同?I was watching the Spring Festival Gala(春晚) on TV when the bell rang.While you were watching the Spring Festival Gala, I was watching fireworks.在搞懂when和while的区别之前,我们需要弄明白延续性动词和非延续性动词。
He worked all day in the laboratory. work_____________________________________________________________________________________________ He died five years ago. die ______________________________________________________________________________________________________________when和while在引导时间状语从句时翻译为________________________________试比较:(when)我在读书的时候,妹妹睡着了。
when与while延续与非延续

while表示“在„„的时候”、“在„„期间”。 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。While 从句中必须是表示动作或状态的延续性动词。如: The weather was fine while we were in Beijing . She called while I was out. 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。如: While we were swimming someone stole our clothes . Don’t talk so loud while others are working.
6. — Dick gave me a note while I ______ B in the library. — I guess he made it to say “sorry” to you. (2007黄冈市) A. am reading B. was reading
C. reads D. will read
ห้องสมุดไป่ตู้
B 4. ― When ______ the car ______? ― In 1885. (2007随州市) A. did; invent B. was; invented C. does; invent D. is; invented D 5. Our teacher wants us to be ______ when we talk with the foreigners. (06大连中考真题) A. comfortable B. unusual C. grateful D. confident
总结
1) when可指时间点, 又可指时间段, 从句中
可用延续性动词, 也可用非延续性动词。
when与while的区别

when与while的区别1. when指某个时间点,表示瞬间动作;while 指某个时间段,表示延续性动作。
如:When I got there, she was playing the violin. 我到那里时,她正在拉小提琴。
While I was playing the violin, he came to see me.我正在拉小提琴时,他来看我了。
补给站:英语中,延续性动作是由延续性动词发出的,瞬间性动作是由非延续性动词发出的。
延续性动词和非延续性动词的区别:延续性动词是指该动作可以延续一段时间,而不是瞬间结束,如work(工作)、study(学习)、eat(吃)、watch(观看);非延续性动词是指该动作极为短暂,瞬间便会结束,如start(开始)、begin(开始)、hit(撞)、see(看见)、knock(敲)、jump (跳)。
2. when表示偏偏在这时,强调双方动作互相冲突;while表示与此同时,双方动作互不相干。
如:When we were having a meeting, the children were shouting outside the window.我们正在开会,孩子们却在窗外大喊大叫。
While we were having a meeting, the children were watching TV in the next room. 我们开会时,孩子们在隔壁房间看电视。
3. when排斥一般时间概念,泛指某特定情况;while表示趁有条件时,强调抓紧时机。
如:When in Rome, do as the Romans do.入乡随俗。
While in Rome, he visited some of his old friends. 他在罗马的时候,拜访了一些朋友。
4. 用于完成时,when表示“在……之后”,while表示“在……期间”。
when和while区别与代词

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。
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。
具体你可以参考这一段。
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。
① 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?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。
when和while用法比较

when和while用法比较When所引导的从句谓语动词可以是延续性动词,也可以是非延续性动词;从句的时态多用一般现在时或一般过去时。
例句:The train had left when I got to the station.例句:I met one of my old friends when I was walking in the street yesterday.而while引导的主从复合句则通常都为延续性的动词,因而常常使用进行时态。
例句:My mother was cooking while my father was watching TV.例句:One boy is rowing while the other boy in the boat is dangling around his legs in the cool water of the lake.一个男孩正在划船,而船里的另一个男孩则把腿悬垂在凉爽的湖水中。
2、when 可以用于be about to do sth. when ...的固定结构当中例句:I was just about to call you when you called me.例句:When I arrived home, my mother was cooking.当我到家进,妈妈正在做饭。
例句:I get the giggles when I'm nervous.我紧张时就不停地咯咯大笑。
While所引导的从句谓语必须是延续性动词;从句一般要用进行时态,如果主句和从句的动作时同时进行的,则主句也应为进行时态。
例句3:The telephone rang while I was watching TV.当我在天电视时,电话铃响了。
例句4:I was writing a letter while my father was reading a newspaper.我爸爸在看报纸时,我正在写信。
while和when的区别以及实例句型

while和when的区别以及实例句型你知道while和when的区别么。
你知道while和when的区别中有多少不为人知的秘密么。
下面由店铺为你分享while和when的区别的相关内容,希望对大家有所帮助。
when和while的有哪些区别when和while的区别11. when引导的时间状语从句中的谓语动词既可以是终止性动词,也可以是延续性动词,而while引导的时间从句中的谓语动词必须是延续性动词。
如:He fell asleep when/ while he was reading. (read是延续性动词)他看书时睡着了。
It was raining hard when we arrived. (arrive是终止性动词)我们到达时正下着大雨。
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 looked after the baby while her mother was out.她妈妈外出时我照顾她。
Strike while the iron is hot.(is是延续性动词,表示一种持续的状态)趁热打铁。
2. 在“be about to do…when…”(正要做…,就在这时/突然…) 这个句型中,只能用when。
如:One day, I was about to do some shopping when hetelephoned me.一天,我正要去买东西,他打电话找我。
3. 在“be on the point of doing…when…” (正要做…,就在这时/突然…) 这个句型中,只能用when。
如:He was on the point of leaving when someone knocked at the door.他刚要走就有人敲门。
初三英语when与while的区别

初三英语when与while的区别http://1. when指某个时间点,表示瞬间动作;while 指某个时间段,表示延续性动作。
如:When I got there, she was playing the violin. 我到那里时,她正在拉小提琴。
While I was playing the violin, he came to see me.我正在拉小提琴时,他来看我了。
补给站:英语中,延续性动作是由延续性动词发出的,瞬间性动作是由非延续性动词发出的。
延续性动词和非延续性动词的区别:延续性动词是指该动作可以延续一段时间,而不是瞬间结束,如work(工作)、study (学习)、eat(吃)、watch(观看);非延续性动词是指该动作极为短暂,瞬间便会结束,如start(开始)、begin(开始)、hit(撞)、see(看见)、knock(敲)、jump (跳)。
2. when表示偏偏在这时,强调双方动作互相冲突;while表示与此同时,双方动作互不相干。
如:When we were having a meeting, the children were shouting outside the window.我们正在开会,孩子们却在窗外大喊大叫。
While we were having a meeting, the children were watching TV in the next room. 我们开会时,孩子们在隔壁房间看电视。
3. when排斥一般时间概念,泛指某特定情况;while表示趁有条件时,强调抓紧时机。
如:When in Rome, do as the Romans do.入乡随俗。
While in Rome, he visited some of his old friends. 他在罗马的时候,拜访了一些朋友。
4. 用于完成时,when表示“在……之后”,while表示“在……期间”。
延续性动词和非延续性动词以及when_while的用法和区别

(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。
2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗?3、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。
(二)、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。
例如: 1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。
2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
例如: 1、While they were talking , the bell rang. 正在他们谈话的时候,上课铃响了。
2、I was doing my homework when my mother came back home yesterday evening.昨天晚上妈妈回家的时候一、延续性动词和终止性动词的概念英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。
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(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。
2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗?
3、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。
(二)、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。
例如: 1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。
2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。
(三)、另外,when和while的区别还在于:while引导的时间状语从句多用进行时态,而when引导的时间状语从句多用一般时态。
例如: 1、While they were talking , the bell rang. 正在他们谈话的时候,上课铃响了。
2、I was doing my homework when my mother came back home yesterday evening.
昨天晚上妈妈回家的时候
一、延续性动词和终止性动词的概念
英语中,动词按其动作发生的方式、动作发生过程的长短,可分为延续性动词和终止性动词。
延续性动词表示能够延续的动作,这种动作可以延续下去或产生持久影响。
如:learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。
终止性动词也称非延续性动词、瞬间动词或短暂性动词,表示不能延续的动作,这种动作发生后立即结束。
如open, close, finish, begin, come, go, arrive, reach, get to, leave, move, borrow,buy等。
二、延续性动词的用法特征
1.延续性动词可以用于现在完成时,其完成时态可与表示"段时间"的状语连用。
表示"段时间"的短语有:
for two years, during the past three years, since last year, how long等。
如:I have learned English since I came here.自从我来到这儿就学英语了。
2.延续性动词不能与表示短暂时间的"点时间"状语连用。
如:It raind at eight yesterday morning.(误) rain为延续性动词,而at eight表示"点时间",前后显然矛盾。
如果用延续性动词表示一瞬间的动作,可以借助come, begin, get等终止性动词来表示。
上句可改为:It began to rain at eight yesterday morning.(正)又如:
-When did you get to know Jack?
-Two years ago.
-Then you've known each other for more than two years.
-That's right.
三、终止性动词的用法特征
1.终止性动词可用来表示某一动作完成,因此可用于现在完成时。
如:
The train has arrived.火车到了。
Have you joined the computer group?你加入电脑小组了吗?
2.终止性动词表示的动作极其短暂,不能持续。
因此,不可与表示一段时间的状语连用(只限肯定式)。
如:(1)他死了三年了。
误:He has died for three years.
正:He has been dead for three years.
正:He died three years ago.
正:It is three years since he died.
正:Three years has passed since he died.
(2)他来这儿五天了。
误:He has come here for five days.
正:He has been here for five days.
正:He came here five days ago.
正:It is five days since he came here.
正:Five days has passed since he came here.
(1)、(2)句中的die、come为终止性动词,不能与表示"段时间"的状语连用。
那么,应如何正确表达呢?可以采用下面的四种方法:
(1)将句中终止性动词转换为相应的延续性动词,如上面两例中的第一种正确表达方式。
下面列举几例:leave→be away, borrow→keep, buy→have, begin/start→be on, die→be dead, move to→live in, finish→be over, join→be in/be a member of, open sth.→keep sth. open, fall ill→be ill, get up→be up, catch a cold→have a cold。
(2)将句中表示"段时间"的状语改为表示过去确定时间的状语,如下面两例中的第二种正确表达方式。
(3)用句型"It is+段时间+since..."表达原意,如上面两例中的第三种正确表达方式。
(4)用句型"时间+has passed+since..."表达原意,如上面两例中的第四种正确表达方式。
3.终止性动词可用于现在完成时否定式中,成为可以延续的状态,因而可与表示一段时间的状语连用。
如: He hasn't left here since 1986.
I haven't heard from my father for two weeks.
4.终止性动词的否定式与until/till连用,构成"not+终止性动词+until/till ..."的句型,意为"直到……才……"。
如: You can't leave here until I arrive.直到我到了,你才能离开这里。
I will not go to bed until I finish drawing the picture tonight.今天晚上直到我画完画,我才上床睡觉。
5.终止性动词可以用于when引导的时间状语从句中,但不可以用于while引导的时间状语从句中。
when表示的时间是"点时间"(从句谓语动词用终止性动词),也可以是"段时间"(从句谓语动词用延续性动词)。
而while表示的是一个较长的时间或过程,从句谓语动词用延续性动词。
如:
When we reached London, it was twelve o'clock. (reach为终止性动词)
Please look after my daughter while/when we are away. (be away为延续性动词短语)
6.终止性动词完成时不可与how long连用(只限于肯定式)。
如:
误:How long have you come here?
正:How long have you been here?
正:When did you come here?。