adv.(副词)

1. 什么时候，何时，几时
2. 其时，在那时，当时
3. 当场
4. 什么情况下，什么场合下
5. 从前境况差时，从前，以前，当年

conj.(连词)

1. 既然，考虑到
2. 虽然
3. 然而，可是
4. 然后，在...之后
5. 在那时，当...时，在...期间，在...时
6. 在任何…时候
7. 一…就，刚...就
8. 如果
9. ...就...
10. 而

pron.(代词)

1. 什么时候，何时
2. 那时

n.(名词)

1. 时间，时候
2. 日期
3. 场合

adv.(副词)

1. 什么时候 at what time
2. 在那时,其时 at or on which

conj.(连词)

1. 在…时,当时 at or during the time that
2. 如果,要是 if
3. 既然,考虑到 since; considering that

1.(用于疑问句)什么时候，何时
You usewhen to ask questions about the time at which things happen.

e.g. when are you going home?...
你什么时候回家？
e.g. when did you get married?...
你什么时候结的婚？

2.(表示两事同时发生)在…时，当…时
If something happenswhen something else is happening, the two things are happening at the same time.

e.g. when eating a whole cooked fish, you should never turn it over to get at the flesh on the other side...
吃一整条鱼时，切忌把它翻过来去吃另一面的肉。
e.g. Mustard is grown in the fieldwhen weeds are there, rather thanwhen the growing crops are there.
芥菜要在地里长杂草而不是长庄稼时种植。

3.(引导从句，表示某事发生于另一活动、事件或情形期间)在…的过程中
You usewhen to introduce a clause in which you mention something which happens at some point during an activity, event, or situation.

e.g. when I met the Gills, I had been gardening for nearly ten years.
遇到吉尔一家时我已经做了近10年的园艺工作。

4.(引导从句，说明主句动作已经发生或将要发生时的情况)其时
You usewhen to introduce a clause where you mention the circumstances under which the event in the main clause happened or will happen.

when的近义词

e.g. when he brought Imelda her drink she gave him a genuine, sweet smile of thanks...
当他把饮料拿给艾梅尔达时，她真诚而甜美地向他微笑以示感谢。
e.g. I'll start to think about itwhen I have to write my report.
我要写报告时会对此予以考虑的。

5.(尤用于动词和形容词后引导从句，表示某事发生的时间)什么时候,何时
You usewhen after certain words, especially verbs and adjectives, to introduce a clause where you mention the time at which something happens.

when是什么意思

e.g. I asked himwhen he'd be back to pick me up...
我问他什么时候回来接我。
e.g. I don't knowwhen the decision was made...
我不知道决定是什么时候作出的。

6.(用于引导从句，限定或指示某事发生的时间)…的时候
You usewhen to introduce a clause which specifies or refers to the time at which something happens.

e.g. He could remember a timewhen he had worked like that himself...
他还能记得自己一度工作起来也是那个样子。
e.g. She remembered clearly that daywhen she'd gone exploring the rockpools...
她清楚地记得她去岩石区潮水潭探险的那天。

7.(用于引出某个观点、评论或问题的原因)既然，考虑到
You usewhen to introduce the reason for an opinion, comment, or question.

e.g. How can I love myselfwhen I look like this?...
我这个样子，怎么能对自己满意呢？
e.g. Emerald starlings are fairly smallwhen compared with other such birds.
与同类的其他鸟相比，翠辉椋鸟要小很多。

8.(用于引出使句子的其他部分显得让人吃惊或不大可能的事实或评论)虽然，然而,可是
You usewhen in order to introduce a fact or comment which makes the other part of the sentence rather surprising or unlikely.

e.g. Our mothers sat us down to read and paint,when all we really wanted to do was to make a mess...
我们的母亲让我们坐下来读书和画画，而我们真正想做的却是打打闹闹。
e.g. The temperature sensor is making the computer think the engine is coldwhen, in fact, it's hot.
温度传感器发给计算机的信息为发动机是冷却的，可实际上它的温度很高。

1. 当......时：-->是I met your sister那当时(when)的特定那一个(指明; 也是关系子句的(形容词)功能) 夜晚.

when did that happen?

那件事是什么时候发生的？

They stood respectfully when he entered the room.

当他走进房间时，他们都恭恭敬敬地站着。

Iron will melt when it is made very hot.

当铁烧得很热时就会熔化的。

And they roared when Seaman held up two fingers.

然后当希曼伸出两根指头的时候他们就吼叫起来。

I stayed till noon, when I went home.

我留到中午，然后就回家了。

when all is said and done,we still must eat.

可是说到底，我们还得吃饭。

But when I returned the door was open.

可是回来时门是开着的。

How can they learn anything when they spend all their spare time watching television?

他们把所有的空闲时间都用来看电视了，还能学什麽东西呢？

It was the sort of morning when everything goes wrong.

那天上午就是那样，事事不顺心。

He entered on his inheritance when he was 21.

他21岁时继承了财产。

when did you last see him?

你上次什么时候见到他的？

when can I see you?

我什么时候可以见你？

when (= in what circumstances) would such a solution be possible?

什么情况下可以这么解决？

Sunday is the only day when I can relax.

星期日是我唯一可以休息的日子。

There are times when I wonder why I do this job.

有时候我也不明白自己为什么要干这个工作。

The last time I went to Scotland was in May, when the weather was beautiful.

我上次去苏格兰是在五月份，那时的天气好极了。

Until when can you stay?

你可以待到什么时候？

'u2018I've got a new job. 'u2019 'u2018Since when? 'u2019

“我有了份新工作。”“什么时候开始的？”

I loved history when I was at school.

我上学时喜欢历史。

Call me when you've finished.

你完成后就打电话给我。

Can you spare five minutes when it's convenient?

方便时能占用你五分钟时间吗？

He had just drifted off to sleep when the phone rang.

他刚睡着电话铃就响了。

How can they expect to learn anything when they never listen?

既然他们从不听讲，他们怎么能指望学到东西呢？

She claimed to be 18, when I know she's only 16.

她自称是18岁，可是我知道她才16。

when are you going home?...

你什么时候回家？

when did you get married?...

你什么时候结的婚？

when eating a whole cooked fish, you should never turn it over to get at the flesh on the other side...

吃一整条鱼时，切忌把它翻过来去吃另一面的肉。

Mustard is grown in the field when weeds are there, rather than when the growing crops are there.

芥菜要在地里长杂草而不是长庄稼时种植。

when I met the Gills, I had been gardening for nearly ten years.

遇到吉尔一家时我已经做了近10年的园艺工作。

when he brought Imelda her drink she gave him a genuine, sweet smile of thanks...

当他把饮料拿给艾梅尔达时，她真诚而甜美地向他微笑以示感谢。

I'll start to think about it when I have to write my report.

我要写报告时会对此予以考虑的。

I asked him when he'd be back to pick me up...

我问他什么时候回来接我。

I don't know when the decision was made...

我不知道决定是什么时候作出的。

He could remember a time when he had worked like that himself...

他还能记得自己一度工作起来也是那个样子。

She remembered clearly that day when she'd gone exploring the rockpools...

她清楚地记得她去岩石区潮水潭探险的那天。

How can I love myself when I look like this?...

我这个样子，怎么能对自己满意呢？

Emerald starlings are fairly small when compared with other such birds.

与同类的其他鸟相比，翠辉椋鸟要小很多。

Our mothers sat us down to read and paint, when all we really wanted to do was to make a mess...

我们的母亲让我们坐下来读书和画画，而我们真正想做的却是打打闹闹。

The temperature sensor is making the computer think the engine is cold when, in fact, it's hot.

温度传感器发给计算机的信息为发动机是冷却的，可实际上它的温度很高。

1. when did you see him last?
   你上次是什么时候见到他的?
2. I'd like to know when they will let him out.
   我想知道他们什么时候能让他出去。
3. I don't know when to start.
   我不知道何时开始。
4. This is the hour when the place is full of people.
   这种时候这地方到处都是人。
5. We will put off the meeting till next week,when we will be all here.
   会议将推迟到下周,那时我们都在这儿。
6. That was when I was eight.
   那是我八岁时的事情了。

1. Often she will weep when alone.
   她一个人时常哭。
2. when he comes I'll tell him to fetch the police.
   他来的时候我将让他去喊警察来。
3. I was walking along the street when someone called me from behind.
   我正沿着街道走时,忽然后面有人喊我。
4. when the weather is good,I usually go to the country.
   若是天气好的话,我总是到乡下去。
5. Hardly had I opened the door when I hit him.
   我刚刚打开门就撞到他。
6. He sold it for 10 dollars when everyone else sold it for 12.
   别人卖12元,他却卖10元

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• when%20it%20comes%20to%20the%20crunch">when it comes to the crunch1.
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• when">have seen the day when曾经经历过…的日子...
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• when">each time when每次

• I wonder when this letter will be finished.

  出自：Swift

• when will the car come?

  出自：D. H. Lawrence

• when would it be possible to meet him?

  出自：Sunday Correspondent

• Some wondered when it would happen again.

  出自：New York Review of Books

学校

when是什么意思

B：when is the (assignment/ project/ report) due?
什么时候交（作业/计划/报告）？

when是什么意思

A：It’s due tomorrow.
明天。

结婚纪念日

A：when is your parents’ wedding anniversary?
你父母的结婚纪念日是在哪天？

when

B：Their anniversary is in August.
他们的结婚纪念日是在八月。

旅游

A：when do we (board/ depart/ arrive)?
我们什么时候（登机（船）？/离开？/到达）？

B：At 6:49pm.
下午6点49分。

adv.(副词)

1. when的基本意思是“什么时候”。可用作疑问副词,用来询问某事曾发生或将要发生的时间,引导特殊疑问句; 还可用作关系副词引导限制性定语从句、非限制性定语从句和表语从句,表示“是…时候的事”。

conj.(连词)

1. when可用作从属连词,引导状语从句,表示时间时作“当…时,在…的时候”解; 表示条件时作“如果,要是”解; 表示对比时作“既然,考虑到”解。当when所引导的从句的主语和主句的主语一致时,常将其主语、系动词或助动词省去,只留实义动词或表语,或者改写为短语。
2. when所引导的时间状语从句用一般现在时代替将来时,用现在完成时代替将来完成时。

conj.(连词)

when, as, while

这三个词都可作连词引导一个表示时间的状语从句。as引导的从句作“当…时”或“和…同时”解,从句中的动作与主句中的动作同时发生或同时进行,一般持续时间不长;when引导的从句作“当…时”或“每逢…”解,从句中的动作既可以和主句中的动作同时发生,也可以在主句的动作之前或之后发生;while引导的从句作“当…时”或“在…期间”解,它强调从句中的动作与主句中的动作同时发生,但持续时间一般较长或主句的动作在从句的动作过程中发生。while与as和when的最大区别在于有时含有“趁着…情况的存在赶紧做某事,否则来不及了”的意味。

when，while，as

这些连词均可表示“当……时”引出时间从句。

when所引导的从句，其谓语动词既可是持续动词，也可是短暂动词；谓语动词动作发生的时间可以与主句谓语动词的动作是同时，或之前、之后。

while句中的谓语动词应为持续动词，不用短暂动词，谓语动作发生的时间通常与主句谓语动词动作发生时间是同时。

as侧重指从句与主句的动作同时进行，谓语动词可以是持续性的，可以是短暂性动词。

• ☆ 直接源自古英语的hwenne，意为何时。