happen
happen — verb
1. When something occurs or starts to exist — for instance, a thunderstorm happenin
When something occurs or starts to exist — for instance, a thunderstorm happening at midnight, or a festival happening in the spring.
The accident happened at the intersection near Lakshmi's school.
Haruto called to ask what happened at the board meeting.
question word 'what' as subject of happen
Nobody knows when the next earthquake in the region will happen.
The wedding ceremony is happening next Saturday at St. Mark's Church.
present continuous for scheduled events
Similar power failures happened twice last autumn across the village.
- happen suddenly
- happen unexpectedly
- happen naturally
- happen next
- occur
more formal; common in official or written contexts
- take place
often used for planned or scheduled events
- come about
slightly formal; focuses on how something developed
Grammar Patterns
something happens
it happens that ...
Common Mistakes
2. When something affects a person or thing and produces a certain result for them
When something affects a person or thing and produces a certain result for them — for instance, an accident happening to a cousin, or an odd change happening to a machine.
What happened to your arm, Christopher? It looks very swollen.
'happen to' for asking about a person's condition
Nobody knows what happened to the orange cat that lived behind the bakery.
The same kind of misunderstanding happened to Valentina when she first moved to Japan.
happen to + person for experience
Liam often wonders what happened to his childhood friends from primary school.
Something strange happened to the office network after the big software update.
- happen to someone
- happen to something
- what happened to ...
Grammar Patterns
something happens to somebody / something
Usage Note
The person or thing affected must follow the preposition 'to'. The same word order reversed is wrong — 'happened him' is never correct.
Common Mistakes
3. To do something or be in a particular state by chance and without planning — for
To do something or be in a particular state by chance and without planning — for example, happening to be at the same cafe as an old friend, or happening to know the answer to a stranger's question.
Élise happened to be standing right there when the delivery driver arrived.
happen to + infinitive for chance action
Ilan happened to mention your name at dinner, and everyone remembered you.
We happened to reach the airport gate at the same moment as the governor.
It so happened that Nadia was also looking for a new flat in the same district.
'it (so) happens that' clause for coincidence
Do you happen to know if the library is open this Sunday afternoon?
- happen to be
- happen to know
- happen to see
- happen to mention
- chance to
old-fashioned or literary; less common in everyday speech
- plan to
deliberate intention rather than chance
Grammar Patterns
somebody happens to do something
it (so) happens that ...
Usage Note
This sense is very common in polite questions ('Do you happen to know…') and in story-telling to introduce a coincidence.
Common Mistakes
4. To find or meet a person or thing unexpectedly, without planning or searching —
To find or meet a person or thing unexpectedly, without planning or searching — for instance, happening upon an old letter while tidying a drawer, or happening on a pretty village during a drive.
Vivek happened upon a bundle of old love letters while clearing out his grandmother's attic.
happen upon + object for discovery by chance
Chidi happened on a charming little restaurant tucked away near the train station.
Tendai happened on a rare first-edition stamp at the Sunday flea market.
Lakshmi happened upon the perfect solution while taking a quiet walk in the park.
happen upon + abstract object (solution, idea)
The young journalist happened upon a dusty box of secret files in the newspaper archive.
- happen on
- happen upon
- happen upon a solution
- come across
more common in everyday speech; less formal
- stumble on / stumble upon
similar register to 'happen on'; equally common
- discover by chance
explanatory paraphrase for learners
Grammar Patterns
somebody happens on/upon somebody/something
Usage Note
Considered formal or literary. 'Happen on' and 'happen upon' are interchangeable, though 'upon' sounds slightly more old-fashioned. Not used in casual conversation — 'come across' or 'stumble on' are more natural alternatives in everyday speech.
Common Mistakes
happen on
phrasal verbTo find or meet something or someone by chance.
I happened on an old photograph while cleaning the attic.
Sara happened on a rare book at the flea market.
happen to
phrasal verbTo do something by chance or to affect someone or something.
Do you happen to know what time the meeting starts?
If anything happens to the package, please let me know.
Used to introduce a fact that is surprising or coincidental, especially one that connects to what was just said.
As it happens, Defne's older brother teaches piano at the same school where I work.
I was looking for a plumber, and as it happened, my neighbour knew one who was available that very afternoon.
Used to say that something is true by coincidence, often when you want to point out an unexpected connection.
It just so happens that Chidi's cousin works in the same hospital as Dr. Okafor.
It so happens that I have two spare tickets to the concert tonight, so you can join us.
Said to show that mistakes and bad events are a normal, unavoidable part of life and should not cause too much worry.
The waiter spilled soup on the tablecloth, and the manager just smiled and said, 'Accidents will happen.'
I felt terrible about scratching the car, but my dad said accidents will happen and not to worry about it.
these things happen
idiomUsed to comfort someone who has made a mistake or experienced a minor misfortune, implying the event is normal and not a big problem.
Nadia apologised for arriving late, and her friend smiled and said, 'Don't worry, these things happen.'
When Valentina accidentally deleted the file, her colleague reassured her that these things happen to everyone.
anything can happen
idiomUsed to say that the result of a situation is uncertain and any outcome is possible, especially in sports, competitions, or life in general.
The team was losing by three goals, but in football, anything can happen before the final whistle.
Don't give up on your dream yet — in this world, anything can happen if you keep trying.
A situation or person that is very likely to cause a serious problem in the future.
That old factory with broken pipes is a disaster waiting to happen.
Mia's reckless driving is an accident waiting to happen.
Used to say that the result of something is impossible to predict.
In this competition, anything can happen until the final whistle.
Don't give up hope; anything might happen before the deadline.
Used to introduce a surprising fact or a connection to what was just said.
As it happens, I know the answer to your question.
As it happened, we were both at the same concert last night.
If a particular thing happens.
In the event of a fire, use the stairs, not the elevator.
In the event that you lose your passport, contact the embassy.
Used to say that something is true by chance.
It just so happens that my brother works at that company.
It so happens that we have a spare ticket for the show.
shit happens
idiomUsed to say that bad things sometimes happen for no reason and we must accept it.
I know you're upset about the delay, but shit happens.
After losing his wallet, Tom just shrugged and said, "Shit happens."
happen — adverb
1. Used at the beginning or end of a statement to suggest that something is possibl
Used at the beginning or end of a statement to suggest that something is possible, but you are not certain — similar in meaning to 'perhaps' or 'maybe', but limited to regional dialects of British English.
Happen the train was delayed by the heavy snow in the mountains.
Happen Nadia is still waiting at the wrong bus stop outside the mall.
sentence-initial position
The hikers might come later, happen, if the weather clears up a bit.
sentence-final position
Happen we should ask the old fisherman which path leads to the lake.
Grammar Patterns
happen + clause
Usage Note
This use of 'happen' is a dialect feature found mainly in Northern England and Scotland. It is not considered standard English and should generally not be used in formal writing or by learners of English outside of exposure to regional speech. The standard alternatives 'perhaps' or 'maybe' are safe in all contexts.
Common Mistakes
Word family
Synonym discussion
Sense: verb/1
'Happen' is the most general and neutral word for an event coming into existence — it works in almost any context, from everyday conversation to news reports. 'Occur' is more formal and often used in official reports or academic writing ('The incident occurred at 3 a.m.'). 'Take place' is commonly used for planned or scheduled events ('The concert will take place in the town square'). 'Come about' focuses on how something developed or the process that led to it ('How did this situation come about?'). 'Transpire' is very formal and less common; it can also carry a hint of something being revealed over time ('It later transpired that the manager had known all along'). For learners, 'happen' is the safest choice in speech, while 'occur' and 'take place' are good alternatives in more formal writing.
Common collocations
Etymology
'Happen' comes from Middle English 'happenen', formed from the noun 'hap' (meaning luck or chance) plus the verb suffix '-en'. 'Hap' itself was borrowed from Old Norse 'happ', meaning good luck or a fortunate event. The original sense of 'happen' was therefore 'to come about by luck or chance', a meaning that survives in sense 3 ('I happened to be there') and sense 4 ('happen upon'). Over time the word broadened to simply mean 'occur', losing the element of chance in its most common modern use (sense 1).