副詞什么時(shí)候；何時(shí)；當(dāng)時(shí)；什么情況下pro名詞什么時(shí)候；何時(shí)名詞時(shí)候conj.既然；雖然；可是；在…時(shí)候網(wǎng)絡(luò)時(shí)間；何時(shí)做；當(dāng)……的時(shí)候
副詞
1. when什么意思
1. When did you last see Margaret?
你上一次見到瑪格麗特是什么時(shí)候？
連詞
1. We have only three books when we need five.
雖然我們需要五本書，卻只有三本。
2. We'll start when the team leader comes.
隊(duì)長一來，我們就出發(fā)。
學(xué)校
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B：When is the (assignment/ project/ report) due?
什么時(shí)候交（作業(yè)/計(jì)劃/報(bào)告）？
A：It’s due tomorrow.
明天。
結(jié)婚紀(jì)念日
A：When is your parents’ wedding anniversary?
你父母的結(jié)婚紀(jì)念日是在哪天？
B：Their anniversary is in August.
他們的結(jié)婚紀(jì)念日是在八月。
旅游
A：When do we (board/ depart/ arrive)?
我們什么時(shí)候（登機(jī)（船）？/離開？/到達(dá)）？
B：At 6:49pm.
下午6點(diǎn)49分。
1. 當(dāng)......時(shí)：-->是I met your sister那當(dāng)時(shí)(when)的特定那一個(gè)(指明; 也是關(guān)系子句的(形容詞)功能) 夜晚.
1. (用于疑問句)什么時(shí)候，何時(shí)
You use when to ask questions about the time at which things happen.
e.g. When are you going home?...
你什么時(shí)候回家？
e.g. When did you get married?...
你什么時(shí)候結(jié)的婚？
2. (表示兩事同時(shí)發(fā)生)在…時(shí)，當(dāng)…時(shí)
If something happens when 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...
吃一整條魚時(shí)，切忌把它翻過來去吃另一面的肉。
e.g. Mustard is grown in the field when weeds are there, rather than when the growing crops are there.
芥菜要在地里長雜草而不是長莊稼時(shí)種植。
3. (引導(dǎo)從句，表示某事發(fā)生于另一活動(dòng)、事件或情形期間)在…的過程中
You use when to introduce a clause in which you mention something which happens at some point during an activity, event, or situation.
when
e.g. When I met the Gills, I had been gardening for nearly ten years.
遇到吉爾一家時(shí)我已經(jīng)做了近10年的園藝工作。
4. (引導(dǎo)從句，說明主句動(dòng)作已經(jīng)發(fā)生或?qū)⒁l(fā)生時(shí)的情況)其時(shí)
You use when to introduce a clause where you mention the circumstances under which the event in the main clause happened or will happen.
e.g. When he brought Imelda her drink she gave him a genuine, sweet smile of thanks...
當(dāng)他把飲料拿給艾梅爾達(dá)時(shí)，她真誠而甜美地向他微笑以示感謝。
e.g. I'll start to think about it when I have to write my report.
我要寫報(bào)告時(shí)會(huì)對(duì)此予以考慮的。
5. (尤用于動(dòng)詞和形容詞后引導(dǎo)從句，表示某事發(fā)生的時(shí)間)什么時(shí)候,何時(shí)
You use when after certain words, especially verbs and adjectives, to introduce a clause where you mention the time at which something happens.
when在線翻譯
e.g. I asked him when he'd be back to pick me up...
我問他什么時(shí)候回來接我。
e.g. I don't know when the decision was made...
我不知道決定是什么時(shí)候作出的。
6. (用于引導(dǎo)從句，限定或指示某事發(fā)生的時(shí)間)…的時(shí)候
You use when to introduce a clause which specifies or refers to the time at which something happens.
when的意思
e.g. He could remember a time when he had worked like that himself...
他還能記得自己一度工作起來也是那個(gè)樣子。
e.g. She remembered clearly that day when she'd gone exploring the rockpools...
她清楚地記得她去巖石區(qū)潮水潭探險(xiǎn)的那天。
7. (用于引出某個(gè)觀點(diǎn)、評(píng)論或問題的原因)既然，考慮到
You use when to introduce the reason for an opinion, comment, or question.
when是什么意思
e.g. How can I love myself when I look like this?...
我這個(gè)樣子，怎么能對(duì)自己滿意呢？
e.g. Emerald starlings are fairly small when compared with other such birds.
與同類的其他鳥相比，翠輝椋鳥要小很多。
8. (用于引出使句子的其他部分顯得讓人吃驚或不大可能的事實(shí)或評(píng)論)雖然，然而,可是
You use when 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...
我們的母親讓我們坐下來讀書和畫畫，而我們真正想做的卻是打打鬧鬧。
e.g. The temperature sensor is making the computer think the engine is cold when, in fact, it's hot.
溫度傳感器發(fā)給計(jì)算機(jī)的信息為發(fā)動(dòng)機(jī)是冷卻的，可實(shí)際上它的溫度很高。