when /wɛn/ CET4 TEM4

• 1. 

  QUEST You use when to ask questions about the time at which things happen. 什么时候 (用于疑问句，询问某事发生的时间)

  例：

  When are you going home?

  你什么时候回家？

  例：

  When did you get married?

  你是什么时候结婚的？

• 2. 

  CONJ If something happens when something else is happening, the two things are happening at the same time. (表示两件事同时发生) 当…的时候

  例：

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

  吃一整条做熟的鱼时，你永远都不要把鱼翻过来吃另一边的肉。

• 3. 

  CONJ You use when to introduce a clause in which you mention something that happens at some point during an activity, event, or situation. 当…时 (引导从句，表示从句中提到的事发生在另一活动、事件或情况期间)

  例：

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

  我结识吉尔一家时，我已经几乎做了十年的园艺。

• 4. 

  CONJ You use when to introduce a clause where you mention the circumstances under which the event in the main clause happened or will happen. 在…情况下 (引导从句，表示从句中提到的情况是主句中已经发生或即将发生的事的前提)

  例：

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

  当他给艾梅尔达拿来一杯饮料时，她给了他一个真诚、甜美、表示谢意的微笑。

• 5. 

  CONJ You use when after certain words, especially verbs and adjectives, to introduce a clause where you mention the time at which something happens. 什么时候 (用在某些词尤其是动词和形容词后，引导从句说明某事发生的时间)

  例：

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

  我问他什么时候回来接我。

• 6. 

  PRON-REL You use when to introduce a clause that specifies or refers to the time at which something happens. 当…的时候 (引导表示某事发生的具体时间的从句)

  例：

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

  他还记得当他自己也像那样工作的那段时间。

• 7. 

  CONJ You use when to introduce the reason for an opinion, comment, or question. 既然 (用于引入观点、评论、或问题的原因)

  例：

  How can I love myself when I look like this?

  既然我这么一副样子，我怎么能爱我自己？

• 8. 

  CONJ You use when in order to introduce a fact or comment which makes the other part of the sentence rather surprising or unlikely. 而 (引出令人吃惊的事实或评论)

  例：

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

  我们的妈妈们让我们坐下读书、画画，而我们真正想要做的却是胡闹一阵。