English has a tangle of ways to say you have to do something — "must," "have to," "have got to," "need to," "be forced to" — and Danish has its own set that doesn't line up one-to-one. The four patterns you need at A2 are skal (must/have to), være nødt til at (be forced to — strong), behøve (need, especially in the negative), and have brug for (need a thing). Get these right and you can express the whole range from mild "I should" to urgent "I absolutely have to." The one genuinely dangerous trap is the difference between behøver ikke ("needn't") and må ikke ("mustn't") — they look similar and mean opposite things.
skal: the everyday "have to / must"
Skal (infinitive skulle) is your default. It covers both English "must" and "have to," and it's followed by a bare infinitive — no at. Just like English "I must go" (not "I must to go"), Danish says Jeg skal gå.
Jeg skal arbejde i morgen.
I have to work tomorrow.
Vi skal være der klokken otte.
We have to be there at eight.
Du skal tage din medicin hver dag.
You have to take your medicine every day.
The infinitive after skal carries no at. This is the same rule that governs all Danish modal verbs (kan, vil, må, skal): the verb that follows comes bare. The verb itself goes in second position; whatever follows it (the infinitive) drops to the end of the clause.
To ask whether someone has to do something, flip the verb to the front, as always: Skal du...? ("Do you have to...?"). The past is skulle ("had to / was supposed to").
Skal du virkelig gå allerede?
Do you really have to leave already?
Jeg skulle have ringet til dig i går.
I should have called you yesterday.
være nødt til at: the strong "be forced to"
When the obligation is heavier — there's no choice, you're compelled — Danish uses være nødt til at ("to be forced/obliged to"). It's stronger than skal and emphasizes that circumstances leave you no option. Crucially, unlike the modals, it takes at before the infinitive (because nødt til is an adjective-plus-preposition phrase, not a modal verb).
Jeg er nødt til at gå nu, ellers misser jeg toget.
I have to leave now, otherwise I'll miss the train.
Vi var nødt til at aflyse festen.
We had to cancel the party.
Du er nødt til at sige det til hende.
You really have to tell her.
The form is være ("to be") conjugated for the subject — jeg er nødt til, du er nødt til, vi er nødt til — and the past is var nødt til ("had to / was forced to"). Reach for this when skal feels too weak: skal can sound like a scheduled plan, while være nødt til at makes the compulsion explicit.
behøve: "need to," and especially "needn't"
Behøve ("to need to") is most useful in the negative, where behøver ikke means "doesn't have to / needn't." In the negative it can take either a bare infinitive or at — both behøver ikke gå and behøver ikke at gå are heard — and needn't is by far its most common job.
Du behøver ikke at komme, hvis du er træt.
You don't have to come if you're tired.
Vi behøver ikke skynde os — vi har god tid.
We don't need to hurry — we've got plenty of time.
Det behøver du ikke at undskylde for.
You don't have to apologise for that.
The key insight: behøver ikke removes an obligation. It tells someone they are released from having to do something. This is exactly English "needn't" / "don't have to." Keep this firmly separate from må ikke, which we'll see in a moment, because confusing them is the classic A2 disaster.
have brug for: "need a thing"
When you need a thing (a noun) rather than to do something (a verb), Danish uses have brug for + noun ("to have need of / to need"). Think of it as the noun-taking cousin of behøve.
Jeg har brug for et nyt par sko.
I need a new pair of shoes.
Har du brug for hjælp?
Do you need help?
Hun har brug for lidt mere tid.
She needs a bit more time.
You can also use have brug for at + infinitive ("need to do"), but its core, idiomatic use is with a noun: brug for a thing — brug for hjælp, brug for penge, brug for søvn. The literal sense is "have use for," which is a handy way to remember it.
Build your own: the substitution table
Pick a subject, pick the right obligation pattern, and slot in your verb or noun. Mind which patterns take a bare infinitive (skal) and which take at (nødt til at).
| Subject | Pattern | What follows | Meaning |
|---|---|---|---|
| Jeg | skal | arbejde (bare inf.) | have to (everyday) |
| Vi | er nødt til at | gå (at + inf.) | be forced to (strong) |
| Du | behøver ikke (at) | komme | needn't / don't have to |
| Hun | har brug for | hjælp (noun) | needs (a thing) |
| Han | skulle | ringe (past) | was supposed to / should have |
Common Mistakes
The most dangerous error is using må to mean "have to." In Danish må means "may" (permission) or, in the negative, "must not" (prohibition) — it does not mean "have to." English speakers transfer "I must" → jeg må, which Danish hears as "I may / I'm allowed to."
❌ Jeg må arbejde i morgen.
Incorrect if you mean obligation — this says 'I'm allowed to work tomorrow.'
✅ Jeg skal arbejde i morgen.
I have to work tomorrow.
(There are older or regional uses where må edges toward necessity, but at A2 you should treat må as permission only and reach for skal or være nødt til at for obligation.)
The second, even nastier trap is confusing behøver ikke ("needn't") with må ikke ("mustn't"). They are opposites. Behøver ikke removes an obligation; må ikke imposes a prohibition.
❌ Du må ikke komme, hvis du er træt.
Incorrect if you mean 'you needn't' — this says 'you're forbidden to come.'
✅ Du behøver ikke at komme, hvis du er træt.
You don't have to come if you're tired.
✅ Du må ikke ryge herinde.
You mustn't smoke in here. (genuine prohibition)
Remember: behøver ikke = "no obligation, your choice"; må ikke = "forbidden, not allowed." See Ability and Permission for må on the permission side.
A third mistake is adding at after skal (or any modal). Modals take a bare infinitive.
❌ Vi skal at være der klokken otte.
Incorrect — no at after a modal verb.
✅ Vi skal være der klokken otte.
We have to be there at eight.
Conversely, a fourth mistake is dropping at after være nødt til, which is not a modal and does require it.
❌ Jeg er nødt til gå nu.
Incorrect — være nødt til requires at before the infinitive.
✅ Jeg er nødt til at gå nu.
I have to leave now.
Key Takeaways
- skal = everyday "must / have to," bare infinitive: skal gå.
- være nødt til at = strong "be forced to," with at: er nødt til at gå.
- behøver ikke (at) = "needn't / don't have to" — removes obligation.
- have brug for
- noun = "need a thing": brug for hjælp.
- Never use må for obligation, and never confuse behøver ikke ("needn't") with må ikke ("mustn't").
Now practice Danish
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Start learning Danish→Related Topics
- Skulle: Obligation, Plans and HearsayA2 — The modal skulle (skal/skulle/skullet) — obligation, arranged plans and future, rules, the reportative 'is said to', and hypothetical 'were to'.
- Modal Verbs: An OverviewA2 — The six core Danish modals — kunne, ville, skulle, måtte, burde, turde — their present and past forms, and the iron rule that they take a bare infinitive with no at.
- Ability and PermissionA2 — How to say can, be able to, may, and be allowed to in Danish — kan (godt), må (gerne), and have lov til at — with graded model sentences, the må-ikke prohibition trap, and a substitution table.
- Building Danish Sentences: An OverviewA1 — How Danish clauses are assembled — SVO as the default, V2 reshuffling, the obligatory subject (including dummy det/der), and how the five clause types are variations on one schema.
- The V2 Rule: Verb SecondA1 — The core rule of Danish main clauses: the finite verb stands in second position, with exactly one constituent before it — and the subject inverts when anything else is fronted.