Kunne: Ability and Possibility | Danish Grammar

The modal kunne is Danish for can — but it stretches further than its English cousin. It covers raw ability, open possibility, learned skills (including languages, where it works in a way English has no single word for), and a slice of permission. This page maps those meanings and the all-important polite past form kunne du...? Its forms are kan (present), kunne (past), kunnet (perfect participle).

Infinitive	Present	Past	Perfect
at kunne	kan	kunne	har kunnet

Remember the iron rule from the modals overview: kunne takes a bare infinitive, no at.

Ability: "can" / "be able to"

The core meaning is physical or practical capability — the same as English can and be able to. Danish has only this one word for both.

Jeg kan svømme, men jeg kan ikke dykke.

I can swim, but I can't dive.

Kan du nå op til den øverste hylde?

Can you reach the top shelf?

Efter ulykken kunne han ikke gå i flere måneder.

After the accident he couldn't walk for several months. (past kunne = real past ability)

Note that the last example uses kunne for genuine past time ("was not able to"), while the same form will reappear below as a politeness softener. Danish, like English, lets one form do both jobs and trusts context to tell them apart.

Possibility: "it may / it might happen"

Kunne also expresses possibility — that something is capable of happening, not that someone is capable of doing it. Here English usually switches to may, might, or could, but Danish stays with kan/kunne.

Det kan ske, at toget er forsinket.

It may happen that the train is delayed.

Pas på — vejen kan være glat efter regnen.

Be careful — the road might be slippery after the rain.

Det kunne være sjovt at tage i biografen.

It could be fun to go to the cinema. (kunne = tentative possibility)

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When English reaches for may, might, or could to mark possibility, Danish almost always just uses kan or kunne. Don't go looking for a separate word — kunne is doing double duty as both can and might.

The skill idiom: kan + a language or activity

Here is the construction that has no English equivalent and that learners most often miss. When the thing you "can" is a skill — especially a language — Danish puts it directly after kan, with no second verb. Han kan dansk does not mean "he can Danish"; it means "he knows / speaks Danish." The kan alone carries the sense of "has mastered."

Hun kan dansk, engelsk og lidt tysk.

She speaks Danish, English and a little German.

Kan du tabellerne udenad?

Do you know your times tables by heart?

Min søn kan allerede alfabetet.

My son already knows the alphabet.

This extends to any learned thing you can "have down": a song, a poem, the rules of a game. The mental model is kan = "have it stored and ready." You can add an explicit verb — kan tale dansk ("can speak Danish") is perfectly correct and emphasises the act of speaking — but you must not feel you need one. Kan dansk is complete on its own.

Permission: overlapping with måtte

Kunne shades into permission too, just as casual English "Can I...?" does. Strictly, permission is the job of måtte (må jeg...? = "may I...?"), but in relaxed speech kan is common.

Kan jeg få et glas vand?

Can I have a glass of water? (casual permission/request)

Du kan tage en kage, hvis du vil.

You can take a cake if you like.

For a clear request for permission — especially a polite or formal one — Danish prefers må: Må jeg låne din telefon? ("May I borrow your phone?"). Use kan for casual asking; reach for må when you mean "am I allowed to."

The polite past: kunne du...?

The past form kunne is the everyday politeness softener, exactly like English could. Kan du...? is a blunt "Can you...?"; kunne du...? is the gentler "Could you...?" No past time is involved — the past form simply makes the request less direct.

Kunne du hjælpe mig med at bære det her?

Could you help me carry this?

Kunne jeg eventuelt få regningen?

Could I possibly get the bill?

Jeg ville ønske, jeg kunne tale flydende.

I wish I could speak fluently. (kunne = hypothetical, not past)

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To be polite, swap kan for kunne. Kunne du...? is the standard courteous request — the same softening move English makes with could you...?

Common Mistakes

❌ Han kan tale dansk og engelsk og fransk.

Not wrong, but heavy — tale is unnecessary when listing languages someone knows.

✅ Han kan dansk, engelsk og fransk.

Correct — kan + language directly already means 'knows/speaks'.

❌ Hun kan dansk at tale.

Wrong — you cannot bolt an at-infinitive onto the kan + language idiom.

✅ Hun kan tale dansk.

Correct — if you want an explicit verb, it's kan + bare infinitive: kan tale.

❌ Kan jeg gå på toilettet? (asking a teacher for permission)

Understandable, but kan asks about ability, not permission — sounds odd in a formal permission request.

✅ Må jeg gå på toilettet?

Correct — for genuine permission, use må (may).

❌ Jeg kan at svømme.

Wrong — never put at after a modal.

✅ Jeg kan svømme.

Correct — kan + the bare infinitive svømme.

Key Takeaways

kan / kunne / har kunnet — ability ("can"), possibility ("may/might"), and a thin layer of permission.
The skill idiom: kan
- a language or learned thing = "knows / speaks it," with no extra verb. Hun kan dansk = "She speaks Danish."
You may add a verb — kan tale dansk — but you never must.
For real permission, prefer måtte (må jeg...?); use kan only casually.
The past form kunne is the polite or hypothetical softener: kunne du...? = "could you...?"

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