the when and (the) where (of sth)
常用来一并谈论某项安排的时间与地点，冠词 the 通常不能省略。
She explained the when and the where of the meeting.
她说明了会议的时间和地点。
某事发生的时间。
某事发生的时间。
The time at which something happens.
The when of the meeting is still undecided.
会议的时间还未确定。
用法提示：when作名词，指‘时间、时刻’。
Please confirm the when and the where of the event by email.
请通过电子邮件确认活动的时间和地点。
用法提示：when用作名词，表示‘时间’。
I can tell you the where, but I don't know the when.
我可以告诉你地点，但不知道时间。
用法提示：这里的when是名词，意为‘时间’。
常用来一并谈论某项安排的时间与地点，冠词 the 通常不能省略。
She explained the when and the where of the meeting.
她说明了会议的时间和地点。
用复数时表示涉及多个时间点和地点，语气偏口语。
We still need to sort out the whens and wheres of the trip.
我们还需要把这次旅行的时间和地点都安排好。
the when of... 指“……发生的时间”，多用于正式或书面表达。
The when of the launch is still unclear.
发布的时间仍不清楚。
grammar · medium
易错句子Sorry, I have no when to talk right now.
正确表达Sorry, I have no time to talk right now.
名词 when 只指“某事发生的那个具体时间”，多见于 the when and where / the when and how 这类搭配，不能泛指一段可用的时间；泛指“时间”要用不可数名词 time。中文“我没时间”里的“时间”是泛指，所以不能直译成 when。
grammar · medium
易错句子I don't know the when she will arrive.
正确表达I don't know when she will arrive.
这里 when 引导宾语从句，是连接词，本身不作名词，因此前面不能加冠词 the；加了 the 就是把它误当成可数名词。表示“她什么时候到”直接用 when 引导从句即可。
（某事发生的）时间和地点
The report explains the when and the where of the accident.
这份报告说明了事故发生的时间和地点。
（某事发生的）时间和方式
The team must decide the when and the how of the launch.
团队必须决定发布的时间和方式。
（某事发生的）时间和原因
She asked about the when and the why of the change.
她询问了这次变更的时间和原因。
Choose the next layer that will help you use whens with more confidence.
Recommended next
Preparing Confusing words
Complete this area with confusing words.
Includes Context & register & Memory tip
Analyze the context and learn memory tricks to remember it.
More ways to explore
Includes Synonyms & Antonyms
Expand your vocabulary with synonyms and antonyms.
Includes Spelling & sound
Explore words with similar spelling endings or sounds.
Includes Word components & Thematic vocabulary
Learn how to build related words using roots, prefixes, and thematic clusters.
Includes Idioms & Cultural references
Discover idioms, slang, and famous pop culture quotes.
Dictionary facts from AI_FALLBACK, DICTIONARY_API_DEV, ECDICT, WIKTIONARY.