Opstå means 'to arise, to occur, to emerge, to break out'. It is built on the strong verb stå ('to stand') with the prefix op- ('up'), and describes something coming into being — a problem, a fire, a misunderstanding, an opportunity. Because it marks a change of state (a thing goes from not-existing to existing), it is one of the verbs that takes være, not have, in the perfect — der er opstået et problem, not har opstået. That auxiliary choice is the single point English speakers most often get wrong, and the whole page builds toward it.
Principal parts
| Infinitive | Present | Past | Past participle |
|---|---|---|---|
| (at) opstå | opstår | opstod | opstået |
Opstå is strong, following its parent stå, stod, stået: the past opstod changes the stem vowel to -o-, and the participle opstået keeps the strong -et. It belongs to the same stå family as forstå, bestå, modstå — learn stå once and the ablaut transfers to all of them. An imperative is essentially nonexistent here: you cannot command something to come into being, so opstå! does not occur in normal use.
Present: opstår
The subject of opstå is the thing that comes into being. It very often appears in the existential frame der opstår... ('there arises...').
Der opstår tit misforståelser, når man skriver i stedet for at ringe.
Misunderstandings often arise when you write instead of calling.
Brande opstår hyppigt i køkkenet.
Fires frequently start in the kitchen.
Når der opstår tvivl, så spørg.
When doubt arises, ask.
Past: opstod
Der opstod en brand i bygningen ved midnat.
A fire broke out in the building at midnight.
Problemet opstod, fordi ingen havde læst manualen.
The problem arose because nobody had read the manual.
Idéen opstod over en kop kaffe.
The idea came about over a cup of coffee.
Present perfect: er opstået — the key point
Here is the rule that defines this verb. Opstå describes a change of state — coming into existence — so it takes the auxiliary være in the perfect: er opstået, never har opstået.
Der er opstået et problem med betalingen.
A problem has come up with the payment.
En ny situation er opstået siden i går.
A new situation has arisen since yesterday.
Branden er sandsynligvis opstået i en kortslutning.
The fire most likely started in a short circuit.
This trips up English speakers because English uses "have" for everything — "a problem has arisen". Danish, like German and French, splits its perfect auxiliaries: verbs of motion to a goal and verbs of change of state take være, while most other verbs take have. Opstå is squarely a change-of-state verb — a thing transitions from non-being to being — so være is mandatory. Contrast its parent stå, which is a static position verb and takes have (bilen har stået her længe). The prefix op- turns the static "stand" into the dynamic "come into being", and the auxiliary flips with it. See have vs være in the perfect for the full system.
der opstå — the impersonal frame
Opstå lives most naturally in the impersonal der-construction, where der fills the subject slot and the real subject follows the verb. This is the standard way Danish announces that something has come up.
Der er opstået en fejl. Prøv igen senere.
An error has occurred. Try again later.
Hvis der opstår spørgsmål, er du velkommen til at ringe.
If any questions come up, you're welcome to call.
See impersonal verbs for more on the der-frame.
Common collocations
| Expression | Meaning |
|---|---|
| der opstår et problem | a problem arises |
| der opstår en brand | a fire breaks out |
| der opstår tvivl / en misforståelse | doubt / a misunderstanding arises |
| der opstår en mulighed | an opportunity arises |
opstå vs ske vs finde sted vs udvikle sig
English "happen / occur / arise / take place" maps onto several Danish verbs with real differences.
- opstå — something comes into being: a problem, a fire, an idea. The focus is on the emergence of a new thing.
- ske — the neutral, everyday 'happen': hvad er der sket? ('what's happened?'). Use it for events in general, not specifically the birth of something. It too takes være (der er sket en ulykke).
- finde sted — 'take place', for scheduled or located events: mødet finder sted på torsdag ('the meeting takes place on Thursday').
- udvikle sig — 'develop, evolve' — a gradual unfolding rather than a sudden coming-into-being.
Der opstod et problem, og så skete der en ulykke — men selve mødet fandt aldrig sted.
A problem arose, and then an accident happened — but the meeting itself never took place.
The default for 'happen' is ske; reach for opstå specifically when a new entity or situation emerges.
Common mistakes
The single most important error is using have instead of være in the perfect.
❌ Der har opstået et problem.
Wrong auxiliary — 'opstå' is change-of-state, so it takes 'være'.
✅ Der er opstået et problem.
A problem has arisen.
The next is regularising the strong past.
❌ Branden opståede om natten.
Wrong — 'opstå' is strong; the past is 'opstod'.
✅ Branden opstod om natten.
The fire broke out during the night.
Don't reach for opstå where neutral ske ('happen') is what you mean.
❌ Hvad er opstået?
Unnatural — for 'what's happened?' use 'ske'.
✅ Hvad er der sket?
What's happened?
Finally, keep the å in the participle — it is opstået, not opstaet.
❌ Der er opstaet en fejl.
Wrong spelling — the participle is 'opstået'.
✅ Der er opstået en fejl.
An error has occurred.
Now practice Danish
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Start learning Danish→Related Topics
- StåA2 — Full reference for the strong verb stå ('to stand'), and the daily idiom der står for 'it says (in writing)'.
- Have vs Være in the PerfectB2 — Danish builds the perfect with two auxiliaries — default har, but er for motion-to-a-goal and change-of-state when you mean the resulting new location or state.
- Impersonal Verbs and Det-subjectsB1 — Danish impersonal constructions with dummy det (weather, evaluations, experiencer verbs), the obligatory subject rule, and the det er vs der er contrast.
- Strong Verbs: Ablaut PatternsA2 — Danish strong verbs form their past by changing the stem vowel — learn the major ablaut series as families to turn memorisation into pattern recognition.