最新when和while的区别.doc
![资源得分’ title=](/images/score_1.gif)
![资源得分’ title=](/images/score_1.gif)
![资源得分’ title=](/images/score_1.gif)
![资源得分’ title=](/images/score_1.gif)
![资源得分’ title=](/images/score_05.gif)
《最新when和while的区别.doc》由会员分享,可在线阅读,更多相关《最新when和while的区别.doc(27页珍藏版)》请在得力文库 - 分享文档赚钱的网站上搜索。
1、精品资料when和while的区别.when和while的区别 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。 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。 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
2、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. 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 s
3、ound 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。 Why do you want a new job when youve got such a good one already?
4、(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。 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 whe
5、n。 When 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。 When 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。 When 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。 When While A
6、s 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。 As the time went on,the weather got worse(as表示“随着”之意) The atmosphere gets thinner and thinner as the height increases随着高度的增加,大气越来越稀薄。 As years go
7、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。 The little girls sang as they went小姑娘们一边走,一边唱。 The 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。 You shall borrow the book when I have finished reading it在我读完这本书后,你可以借阅。 When the m
8、anager 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)。 sbhad hardly(scarcely) done sthwhenHardly Scarcely had sbdone sthwhen I had hardly scarcely closed my eyes when someone knocked at the doorHardly Scarcely had I closed my eyes when so
9、meone knocked at the door我刚一闭上眼,就有人在敲门了。 I had hardly scarcely entered my room when the telephone rangHardly Scarcely had I entered my room when the telephone rang我刚一走进房门,电话就响了。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 asl
10、eep 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:Dont talk while youre 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:
11、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
12、,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。两者的区别如下: 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。 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。 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
13、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. 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
14、 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(arriv
15、e)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 bu
16、ildingwhile 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。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。w
17、hen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
18、)、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 cant do your homework while youre 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:
19、 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,我正在做家庭作业。when/while都可做并列连词前者表and at that time,(这时,突然),后者表对比,可译为”然而”I was going downstairs when the telephone rang.Lucy is in blue while Lily is in green
20、. when后加瞬间动词 while后也可加持续性动词(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 w
21、as 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 cant do your homework while youre 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
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 最新 when while 区别
![提示](https://www.deliwenku.com/images/bang_tan.gif)
限制150内