one day
one day — idiom
1. used when talking about something you hope or intend to do, believing it will ev
used when talking about something you hope or intend to do, believing it will eventually happen even though you cannot say exactly when
Manuela dreams that one day she will open a small café in Lisbon.
one day + will + verb for future dream
Hugo says he wants to climb Mount Kilimanjaro one day before he turns forty.
wants to + verb + one day for intention
The scientist believes one day doctors will cure many diseases that seem incurable now.
Minho told his sister that one day their band would play at a big stadium.
- someday
more informal; interchangeable in most future contexts
- eventually
stronger implication that it will happen after a long delay, not just possibility
- never
direct opposite — not at any time, now or in the future
文法句型
one day + future tense clause
用法筆記
Commonly used with will, would, or want to to express future hopes or plans. Often appears at the beginning or end of a sentence.
常見錯誤
2. on a particular but unspecified day in the past, used when telling a story or re
on a particular but unspecified day in the past, used when telling a story or remembering something that happened at that time
One day last autumn, Jenna found a stray kitten hiding under her car.
one day + time phrase + past tense for storytelling
Hamza remembers one day when his grandfather taught him how to fix a bicycle chain.
One day in July, the whole street lost power and the neighbours ate dinner outside.
Caleb met his business partner one day at a coffee shop in Seoul.
- once
slightly more literary; used in story openings ('Once, there was…')
- on a certain day
more formal; implies the day is known to the speaker
文法句型
one day + past tense clause
用法筆記
Often opens a story or anecdote, followed by a clause in the simple past. Can be combined with a time expression (last summer, in March, in 2019) to narrow the reference.