Word · Frequency #54
when
/wen/
adverb
……的时候；届时
The time at, on, or during which.
用于引导表示时间的定语从句。
- 1.
At an earlier time and under different, usually less favorable, circumstances.
在较早时候且处于不同(通常较不利)的情况下。
- 2.
The time at, on or during which.
所述的时间。
从前；当年；往日；在较早时候且处于不同(通常较不利)的情况下。；所述的时间。；何时；什么时候
In use
That was the year when my family moved to a new city.
I miss the days when we used to play outside until dark.
Do you remember the exact moment when the lights went out?
When + do/does/did + subject + verb?
疑问副词，询问时间。
When did you arrive?
你什么时候到的？
the + time/date/year + when + clause
定语从句中用作关系副词。
I remember the day when we first met.
我记得我们第一次见面的那一天。
When + subject + verb, ...
引导时间状语从句。
When I was young, I loved to play outside.
Connections
Collocations
- when to
- 什么时候；何时
- I don't know when to start.我不知道什么时候开始。
- when it comes to
- 当谈到；就……而言
- When it comes to cooking, she is an expert.谈到烹饪，她是专家。
- when necessary
- 必要时
- Add more water when necessary.必要时加更多水。
- even when
- 即使当；即使……的时候
- He keeps smiling even when he is sad.即使难过时他也保持微笑。
- when possible
- 可能时
- Take the stairs when possible.可能时走楼梯。
- since when
- 从什么时候起
Learner notes
Memory Tip
问时间就用'when'，'w'像疑问的'问'。
Context & Register
通常用于询问时间，语体中性，适用于口语和书面语。
Grammar Note
常用于疑问句或引导从句，表示时间。
Pronunciation & Spelling
All listed words rhyme with 'when', sharing the /ɛn/ ending sound.
High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Usage priority
Collins 词频等级为 5，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from AI_FALLBACK, DICTIONARY_API_DEV, ECDICT, WIKTIONARY.