when

意味

• conj. ～の時に
• adv. いつ
• pron. いつ
• n. 時

英語の定義

• adv. At what time; -- used interrogatively.
• adv. At what time; at, during, or after the time that; at or
• just after, the moment that; -- used relatively.
• adv. While; whereas; although; -- used in the manner of a
• conjunction to introduce a dependent adverbial sentence or clause,
• having a causal, conditional, or adversative relation to the principal
• proposition; as, he chose to turn highwayman when he might have
• continued an honest man; he removed the tree when it was the best in
• the grounds.
• adv. Which time; then; -- used elliptically as a noun.

例文

1. conj. ～の時に

   Please turn off the lights when you leave the conference room.

   会議室を出る時に、電気を消してください。

2. adv. いつ

   Do you know when the next train to London will arrive?

   ロンドン行きの次の列車がいつ到着するか知っていますか。

3. pron. いつ

   Since when have you been interested in learning Japanese history?

   いつから日本の歴史を学ぶことに興味を持っているのですか。

4. n. 時

   We have already decided where to hold the event, but the when is still uncertain.

   イベントの開催場所はすでに決まりましたが、その時期はまだ確定していません。