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1. （用作疑問副詞）什麼時候，何時
   I'd like to know when they'll let him out.

   我想知道他們什麼時候放他。

   When did you last see Margaret?

   你上一次見到瑪格麗特是什麼時候？

2. （用作關係副詞，引導關係子句）當……時
   There were times when I didn't know what to do.

   有些時候我不知道該怎麼辦才好。

conj.

1. 當……時
   John got engaged to her when travelling last winter.

   去年冬天旅行時，約翰與她訂了婚。

   Don't get excited when you talk.

   你說話時別激動。

2. 既然，考慮到
   How can he get the promotion when his boss dislikes him?

   既然上司不喜歡他，那他怎麼會獲得提升呢？

3. 雖然，然而
   I had only fifteen dollars on me when the book I wanted cost twenty.

   我身上只帶了十五元錢，可是我想買的那本書定價二十元。

4. 在那時，然後

pron.

1. 什麼時候，那時
   Since when has she taught here?

   她從什麼時候開始在這兒教書的？

n.

1. （事件發生的）時間[the S]

interrog. adv.

1. at what time.
   ▸how soon.
2. in what circumstances.

rel. adv.

conj.

1. at or during the time that.
   ▸at any time that; whenever.
2. after which; and just then.
3. in view of the fact that; considering that.
4. although; whereas.