"when"和"while"都是英语中的从属连词,在句子中连接一个从句和一个主句,起到时间关系的作用,但在使用时有一些不同: "when"表示两个事件发生的时间是相互关联的,一个事件发生后另一个事件立即发生。例如:When I arrived at the airport, the plane had already taken off. (当我到达机场时,飞机已经起飞了。)I always drink coffee when I wake up. (我每天一起床就喝咖啡。) "while"表示两个事件发生的时间是同时进行的,它们可能会重叠或者在同一时间段内发生。例如:While I was watching TV, my phone rang. (当我在看电视时,手机响了。)I listened to music while I was cleaning the house. (我在打扫房子的时候听音乐。) 总之,"when"和"while"都用来描述时间关系,但是"when"通常用于描述两个事件之间的先后关系,而"while"则通常用于描述两个事件之间的同时性。
连接词when与while是一对常与过去进行时合作的twins。但正如世界上没有两片完全相同的树叶一样,when与while在有着某些相似之处的同时,彼此也各有一些区别于对方的截然不同的“独特个性”。Do you want to know the differences between them?请看——
● when 解析版
〔引导时间状语从句〕具体地说,它有以下几种含义:
1.表明一个动作发生的时候,另一个动作正在进行之中。例如:
When the teacher came into the classroom ,we were reading English.当老师走进教室时,我们正在读英语。
2.表明当某一动作正在进行时,另一动作发生了。如:
When Kate was flying a kite,she found a wallet lying on the ground.凯特正在放风筝时,她发现地上有个钱包。
〔特别提示〕当when从句放在主句之后时,它更强调某一动作的突然性,此时的when相当于and then,and suddenly,just at that time。如;
1.We were watching TV when the telephone rang.(=We were watching TV and suddenly the telephone rang.)我们正在看电视,(突然)电话铃响了。
试比较:When we were watching TV, the telephone rang.我们正在看电视时,电话铃响了。
2.The boys were playing football when it began to rain.男孩子们正在踢球时,(不料)开始下雨了。
3.I was taking a walk when I came across Lily.我正在散步时,(没想到)遇见了莉莉。
特别是主句中有just,或when从句中有suddenly时,这种突然性更为明显、强烈。例如:
4.He was just falling asleep when he heard someone shout,“Stop the thief!”他刚要入睡,突然听到有人喊:“抓贼!”
5.We were doing our homework at school last night when the lights went out.昨天晚上我们正在学校写作业时,灯(突然)灭了。
〔相关链接〕when引导的状语从句除了上述意义之外,也常具有其他一些含义:
1.一……就……(=as soon as)
We will stand up when the teacher comesin.老师一进来我们就起立。
2.虽然;然而;可是(=although)
We had only five boxes when we needed eight.我们需要八个箱子,可是只有五个。
3.每当……(=whenever)
It is always very hot here when it is summer.每当夏季,这儿总是很热。
4.既然(=since,as)
Why did you come here on foot when you know you should come by bike?既然你知道该骑自行车来,你为何还要步行呢?
●练习版 Can you say the following sentences in English?
1.当我们到达火车站时,天正下着雪。
______________________________
2.孩子们正在做游戏,突然铃响了。
______________________________
3.爸爸在洗车时,妈妈在做饭。
______________________________
4.琳达正在跑步时伤了自己的左腿。
______________________________
5.我们在西安时,每天见面。
______________________________
Key:
1.When we got to the train station,it was snowing.
2.The children were playing games when the bell rang.
3.While dad was washing his car,mum was cooking.
4.When /While Linda was running,she hurt her left leg.
5.When /While we were in Xi'an,we met every day. 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,我正在做家庭作业本回答被提问者和网友采纳
第3个回答 2009-04-12
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,我正在做家庭作业
第4个回答 2019-09-28
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。例如,When were you bron? (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 注意: 1) 如主句谓语动词表示的是短暂动作,从句时间状语指一段时间,when while as 三者可通用。 例如: Peter came in while /as I was watching TV.当Peter进来的时候我正在看电视。 I was watching TV when Peter came in. 当Peter进来时我正在看电视。 2) as 和 when 可与非延续性动词连用,而 while 只能与延续性动词连用。 例如:He came in when/ as I was going to bed.我正要上床睡觉,他进来了。 3) as 和 while可用来指一段时间,但 as 强调主句与从句表示的动作同时发生,while强调主句表示的动作是在 while 从句的动作延续中发生。 例如: As my mother sang those old songs, tears ran down her cheeks. 当我妈妈唱起那些老歌时,眼泪顺着她的脸颊流了下来。 I came in while he was reading an interesting book in his room