when
US /wen/
UK /wen/

副词
1.
什么时候
at what time or on what occasion
示例:
•
When did you arrive?
你什么时候到的?
•
When will the meeting start?
会议什么时候开始?
2.
当...的时候, 在...时
at the time that; during the time that
示例:
•
I was sleeping when the phone rang.
电话响的时候我正在睡觉。
•
She smiled when she saw him.
她看到他的时候笑了。
名词
1.
时间, 何时
the time at which something happens
示例:
•
Tell me the when and where of the party.
告诉我派对的时间和地点。
•
The exact when of the event is still unknown.
事件发生的具体时间仍然未知。
连词
1.
当...的时候, 那时
at which time (referring to a preceding noun)
示例:
•
There was a time when I believed in magic.
曾几何时,我曾相信魔法。
•
I remember the day when we first met.
我记得我们第一次见面的那天。
在 Lingoland 学习这个单词