丧尸围城3超级武器:when和 while用法区分??!!

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。

区别;

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。

while
KK: []
DJ: []
n.
1. 一会儿,一段时间[S]
I'll be back in a while.
我一会儿就回来。
conj.
1. 当...的时候,和...同时
She listened closely while he read the letter.
他读信时,她听得很仔细。
I'll take care of your children while you are away.
你不在时我会照顾你的孩子的。
We must strike while the iron is hot.
我们必须趁热打铁。
2. 而,然而
I like tea while she likes coffee.
我喜欢喝茶,而她喜欢喝咖啡。
3. 虽然,尽管
While I like the color of the hat, I do not like its shape.
虽然我喜欢这顶帽子的颜色,但我不喜欢它的形状。
4. 只要
vt.
1. 消磨(时光),轻松地度过[(+away)]
He whiled away the whole afternoon watching TV.
他看电视消磨了一个下午。

when
KK: []
DJ: []
ad.
1. (用作疑问副词)什么时候,何时
I'd like to know when they'll let him out.
我想知道他们什么时候放他。
When did you last see Margaret?
你上一次见到玛格丽特是什么时候?
2. (用作关系副词,引导关系从句)当...时
There were times when I didn't know what to do.
有些时候我不知道该怎么办才好。
conj.
1. 当...时
John got engaged to her when travelling last winter.
去年冬天旅行时,约翰与她订了婚。
Don't get excited when you talk.
你说话时别激动。
2. 既然,考虑到
How can he get the promotion when his boss dislikes him?
既然上司不喜欢他,那他怎么会获得提升呢?
3. 虽然,然而
I had only fifteen dollars on me when the book I wanted cost twenty.
我身上只带了十五元钱,可是我想买的那本书定价二十元。
4. 在那时,然后
pron.
1. 什么时候,那时
Since when has she taught here?
她从什么时候开始在这儿教书的?
n.
1. (事件发生的)时间[the S]

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。
回答者： wswss11986 - 大魔导师 十三级 8-16 20:39

区别;

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。

while
KK: []
DJ: []
n.
1. 一会儿,一段时间[S]
I'll be back in a while.
我一会儿就回来。
conj.
1. 当...的时候,和...同时
She listened closely while he read the letter.
他读信时,她听得很仔细。
I'll take care of your children while you are away.
你不在时我会照顾你的孩子的。
We must strike while the iron is hot.
我们必须趁热打铁。
2. 而,然而
I like tea while she likes coffee.
我喜欢喝茶,而她喜欢喝咖啡。
3. 虽然,尽管
While I like the color of the hat, I do not like its shape.
虽然我喜欢这顶帽子的颜色,但我不喜欢它的形状。
4. 只要
vt.
1. 消磨(时光),轻松地度过[(+away)]
He whiled away the whole afternoon watching TV.
他看电视消磨了一个下午。

when
KK: []
DJ: []
ad.
1. (用作疑问副词)什么时候,何时
I'd like to know when they'll let him out.
我想知道他们什么时候放他。
When did you last see Margaret?
你上一次见到玛格丽特是什么时候?
2. (用作关系副词,引导关系从句)当...时
There were times when I didn't know what to do.
有些时候我不知道该怎么办才好。
conj.
1. 当...时
John got engaged to her when travelling last winter.
去年冬天旅行时,约翰与她订了婚。
Don't get excited when you talk.
你说话时别激动。
2. 既然,考虑到
How can he get the promotion when his boss dislikes him?
既然上司不喜欢他,那他怎么会获得提升呢?
3. 虽然,然而
I had only fifteen dollars on me when the book I wanted cost twenty.
我身上只带了十五元钱,可是我想买的那本书定价二十元。
4. 在那时,然后
pron.
1. 什么时候,那时
Since when has she taught here?
她从什么时候开始在这儿教书的?
n.
1. (事件发生的)时间[the S]