when和while引导的时间状语从句与这一时态连用

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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。
当飞机抵达时,一部分侦探等在主楼里面,而另一部分则等在停机坪上。
When I came home my wife was cooking dinner.
我回家时,妻子在做晚饭。
通过观察,我们可以这样理解:when引导的从句里动作发生的时间相对主句动作发生的时间要短些;while引导的从句里的动作发生的时间相对主句而言更长些。
While I read, she sang.
我看书时,她在唱歌。
I met her while I was at school.
当我在学校的时候我遇见了她。
Edisonwas not a good student when he was a young boy.
爱迪生小时候不是一个成绩好的学生。
When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield.
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.
②while常表示一段较长的时间,强调主句谓语动词与从句谓语动词同时发生。如:
你的第三道题就是这样。
③只用as, 不用when或while的时候。
A) 用于表示同一个人的两种动作交替进行,指"一边……,一边……"。如:
The girl dances as she sings on the stage.
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。
Though he was tired he offered to carry her.
尽管他很累了,他还主动提出要背着她。
Strong as he was,he couldn’t lift it.
尽管他力气很大,他仍提不起这个东西。
B while可意为but,用于表示强调对比:
‘At sea’means‘on a ship’,while‘at the sea’means‘at the seaside’.
3.----------Peter was reading , his wife was cooking.
A. When B. As C. While D. That
whenaswhile
①when 表示较短的时间,有的时候ቤተ መጻሕፍቲ ባይዱ可以指一段时间。如:
When he was young, he could do eat much more than his brother.
333 as,when,while意为although(尽管),
but(但是),seeing that(鉴于)
A只有在形容词+as+主语+to be/to seem/to appear这一结构中,as才意为though/although(尽管):
Tired as he was he offered to carry her.相当于:
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.
“At sea”意为“在船上”,而“at the sea”意为“在海滩上”。
Some people waste food while others haven’t enough.
B)表示两个同步发展的动作或行为,译为"随着……"。如:
As time went on, she became more and more worried.
when和while的区别
都表示“当......时候”的区别。请观察以下句子:
While inViennahe studied music.
他在维也纳时学习音乐。
While he was eating, I asked him to lend me $2.
当他正在吃饭时,我请他借给我二英镑。
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把着门,另外两个打开包裹。
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. ----------she comes , Ishall tell her to wait for you.
A. WhenB. As C. While D. What
2. ----------she got older, she got wiser.
A. WhenB. As C. While D. That
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