詞語：when
when是什麼意思
簡明英漢詞典
when
[(h)wen]
conj.
就在那個時候, 在...的時候
adv.
什麼時候, ...的時候
pron.
什麼時侯, 那時
美國傳統詞典[雙解]
when
when
AHD:[hwμn, wμn]
D.J.[hwen, wen]
K.K.[hwWn, wWn]
adv.（副詞）
At what time:
什麼時候：
When will we leave?
我們什麼時候離開?
conj.（連接詞）
(1)At the time that:
在…的時候：
in the spring, when the snow melts.
在春天，當雪融化的時候
(2)As soon as:
一…就…：
I'll call you when I get there.
我一到那裡就給你打電話
(3)Whenever:
無論什麼時候：
When the wind blows, all the doors rattle.
只要風一吹，這門就吱嘎作響
(4)During the time at which; while:
在…期間，當…時：
When I was young, I was sick all the time.
在我小時候我總是生病
(5)Whereas; although:
雖然，儘管：
She stopped short when she ought to have continued.
儘管她應該繼續下去，她卻突然停住了
(6)Considering that; if:
考慮到，如果：
How can he get good grades when he won't study?
他不用功的話怎麼拿高分呢?
pron.（代詞）
What or which time:
什麼時候：
Since when has this been going on?
從什麼時候起事情像這樣?
n.（名詞）
The time or date:
時間或日期：
Have they decided the where and when?
他們已經定下來地點和時間了嗎?
語源
(1)Middle English
中古英語
(2)from Old English hwenne * see k wo-
源自 古英語 hwenne *參見 k wo-
用法
In informal style when is often used after be in definitions: A dilemma is when you don't know which way to turn. The construction is useful, but it is widely regarded as incorrect or as unsuitable for formal discourse. In formal style there is no alternative but to rephrase such definitions to avoid is when : A dilemma is a situation in which you don't know which way to turn. You are in a dilemma when you don't know which way to turn.
在非正式文體中when 常在定義中用在 be 後面： 進退兩難就是當你不知道該走哪條路的時候。 這個結構是有用的，但被廣泛認為它對正式交談來說是不正確的或者是不合適的。在正式文體中沒有替代詞，只能改變措辭以避免is when ： 進退兩難就是這樣一個你不知道該怎麼辦的處境。 當你不知道你該做什麼時你就處於進退兩難的維谷了
現代英漢詞典
when
[wen; (?@) hwen]
adv.
(1)什麼時候
When can you come?
你什麼時候能來？
(2)當…的時候
at the time when we met
在我們見面的時候
I lived in this village when I was a boy.
當我還是個孩子的時候我住在這個村莊裡。
詞性變化
when
conj.
(1)…的時候
Edison was not a good student when he was a young boy.
愛迪生小時候不是一個成績好的學生。
When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield.
當飛機抵達時,一部分偵探等在主樓裡面,而另一部分則等在停機坪上。
When I came home my wife was cooking dinner.
我回家時，妻子在做晚飯。
(2)如果；要是；既然
I can't tell you when you won't listen.
既然你不想聽，我就不告訴你了。
(3)其實
He stopped trying, when he might have succeeded next time.
他不再試了，其實他可能下一次就成功。
習慣用語
hardly when
剛…就
Hardly had I opened the door when he told me.
我剛開開門，他就告訴了我。
(= scarcely when)
詞性變化
when
pron.
(1)什麼時候
When else shall we meet again, if August 1st is not convenient for you?
要是八月一日對你不方便,那麼另外什麼時候再碰頭呢?
He then asked when Mr Gilbert would be allowed to go home.
然後他又問,什麼時候可以允許吉爾伯特先生回家。
Since when have he had a car?
他從什麼時候起開始有了一輛汽車？
(2)那時
She wrote a month ago， since when we've heard nothing.
一個月前她來過信，從那時起我們就沒聽到過她的消息。
The Ambassador's wife went on asking questions, when she suddenly noticed a big hole in her husband's hat.
大使的妻子繼續問了好多問題,突然她發現丈夫帽子上有個洞。
現代英漢綜合大辭典
when
[(h)wen]
adv.
(1)[疑問副詞]什麼時候, 何時
(2)[關係副詞]當...時
When will he come?
他什麼時候來?
It was a time when motorcars were rare.
那是汽車很罕見的時代。
I still remember the night when Nanjing was liberated.
我還記得南京解放那天晚上的情景。
詞性變化
when
[(h)wen]
conj.
(1)當...時
(2)一... 就...
(3)如果
(4)雖然; 然而; 可是
(5)既然
(6)考慮到; 那時; 然後
It was raining when we started.
我們動身時正下著雨。
We'll start when the team leader comes.
隊長一來, 我們就出發。
Turn off the switch when anything goes wrong with the machine.
如果機器發生故障, 就把電門關上。
We have only three books when we need five.
雖然我們需要五本書, 卻只有三本。
Why use wood when you can use plastic?
既然能用塑料, 為什麼還要用木料?
We played outside till sunset, when it began to rain.
我們在戶外一直玩到太陽下山, 那時天下起雨來了。
when
[(h)wen]
pron.
(1)[疑問代詞]什麼時候
(2)[關係代詞]那時
Since when have you been here?
你從何時起就在這個地方的?
We came a week ago, since when the weather has been bad.
我們一星期前來到這裡, 從那時起天氣一直不好。
when
[(h)wen]
n.
(事件發生的)時間 the when and where of an act 行為發生的時間和地點
Tell me the when and the why (=reason) of it.
請告訴我時間和原因。
繼承用法
whenissued
adj.
(股票, 證券)虛股的
whenness
n.
時間性[關係]
用法詞典
when
中古英語 whenne＜古英語 hwenne
參考詞彙
when,as,while這三個詞都可以引出時間狀語從句，它們的差別是：when 從句表示某時刻或一段時間 as 從句表示進展過程，while 只表示一段時間
When he left the house, I was sitting in the garden.
當他離開家時，我正在院子裡坐著。
When he arrived home, it was just nine o'clock.
當他到家時，正是九點鐘。
As he grew older, he became more intelligent.
隨著他年齡的增長，他變得更有才智了。
While he was in London,he studied music.
當他在倫敦時，他學習音樂。
While she was typing the letter,the telephone rang.
當她在用打字機打那封信時，電話響了。
[七國語言]英漢公共大詞典
when
當時候;何時
美國傳統詞典
when
when
AHD:[hwμn, wμn]
D.J.[hwen, wen]
K.K.[hwWn, wWn]
adv.
At what time:
When will we leave?
conj.
(1)At the time that:
in the spring, when the snow melts.
(2)As soon as:
I'll call you when I get there.
(3)Whenever:
When the wind blows, all the doors rattle.
(4)During the time at which; while:
When I was young, I was sick all the time.
(5)Whereas; although:
She stopped short when she ought to have continued.
(6)Considering that; if:
How can he get good grades when he won't study?
pron.
What or which time:
Since when has this been going on?
n.
The time or date:
Have they decided the where and when?
語源
(1)Middle English
(2)from Old English hwenne * see k wo-
用法
In informal style when is often used after be in definitions: A dilemma is when you don't know which way to turn. The construction is useful, but it is widely regarded as incorrect or as unsuitable for formal discourse. In formal style there is no alternative but to rephrase such definitions to avoid is when : A dilemma is a situation in which you don't know which way to turn. You are in a dilemma when you don't know which way to turn.
英漢航空大詞典
when
n.在...時候
英漢化學大詞典
when
什麼時候;adv.什麼時候
英漢計算機大詞典
when
什麼時候;adv.什麼時候