Swedish has a verb form that English does not have a clean equivalent for: the supine (supinum). It is the form you put after ha ("have") to build the perfect and pluperfect tenses — jag har talat ("I have spoken"), jag hade skrivit ("I had written"). Its two defining traits are that it is completely invariable — one fixed form that never changes for gender, number, or anything else — and that it is a separate form from the past participle, even though English fuses the two. Get those two ideas firmly in place and the supine becomes one of the more predictable corners of the Swedish verb.
What the supine is for
The supine has essentially one job: it is the form that follows ha (har, hade, ha) in the compound past tenses.
- Perfect: har
- supine — jag har läst ("I have read")
- Pluperfect: hade
- supine — jag hade läst ("I had read")
It also appears in the s-passive perfect, where the perfect and the passive combine — boken har lästs ("the book has been read") — but the core use, and the one to anchor on first, is har/hade + supine.
Jag har redan ätit, tack.
I've already eaten, thanks. har + ätit (supine of äta) — the perfect tense.
Vi hade bott i Malmö i tio år när vi flyttade.
We had lived in Malmö for ten years when we moved. hade + bott — the pluperfect.
It never agrees — one fixed form
This is the easy half of the supine, and a genuine relief after wrestling with adjective agreement. The supine is invariable: it has exactly one form per verb, and that form does not change for the subject's gender, number, or anything else. Han har talat, hon har talat, de har talat, barnet har talat — the supine talat is identical in all of them.
Han har köpt en ny cykel och hon har köpt en bil.
He has bought a new bike and she has bought a car. köpt is the same regardless of who's doing the buying.
Barnen har sovit hela natten.
The children have slept all night. Plural subject, but the supine sovit doesn't change.
This sets the supine apart from the past participle, which agrees like an adjective (en köpt bil, ett köpt hus, köpta bilar) — more on that contrast below and on its own page.
The endings by verb group
Which ending the supine takes depends on the verb's conjugation group. Here is the whole system at a glance:
| Group | Supine ending | Example (infinitive → supine) | Perfect |
|---|---|---|---|
| Group 1 (weak) | -at | tala → talat | har talat |
| Group 2 (weak) | -t | köpa → köpt | har köpt |
| Group 3 (weak) | -tt | bo → bott | har bott |
| Group 4 (strong) | -it | skriva → skrivit | har skrivit |
A handful of examples, one verb per group, all in a real perfect sentence:
Jag har talat med läkaren om provsvaren.
I've spoken with the doctor about the test results. Group 1: tala → talat (-at).
Hon har köpt biljetterna redan.
She's already bought the tickets. Group 2: köpa → köpt (-t).
Vi har bott här sedan 2019.
We've lived here since 2019. Group 3: bo → bott (-tt).
Har du skrivit klart rapporten?
Have you finished writing the report? Group 4 (strong): skriva → skrivit (-it).
Each group has its own dedicated page with the full detail and the common traps: Supine: Groups 1-2 (-at, -t) for the weak verbs, Supine: Group 3 (-tt) for the short vowel-final verbs, and Supine: Strong Verbs (-it) for the strong class with its extra vowel grade.
The big idea: supine ≠ past participle
Here is the point that English speakers must internalise, because English actively hides it. In English, one form does two jobs:
- After "have": I have *written a letter.*
- As an adjective: a *written agreement.*
Both are written. English uses a single -en/-ed form for the verb-after-"have" and for the adjective. Swedish splits these into two distinct forms.
- The supine goes after ha: jag har skrivit ett brev.
- The past participle is the adjective: ett *skrivet avtal* ("a written agreement").
So the English written corresponds to two different Swedish words depending on its grammatical job:
| English "written" | Swedish form | Agrees? |
|---|---|---|
| I have written (after "have") | har skrivit (supine) | no — fixed |
| a written agreement (adjective) | ett skrivet avtal (participle) | yes — like an adjective |
Jag har skrivit boken, och nu finns en skriven bok på bordet.
I have written the book, and now there's a written book on the table. skrivit (supine, after har) vs. skriven (participle, describing boken).
Han har stängt dörren, så nu är dörren stängd.
He has closed the door, so now the door is closed. stängt (supine) vs. stängd (participle, agreeing with dörren).
The supine is the invariable one; the participle is the agreeing one. If the word follows ha, it is a supine and it is frozen. If the word describes a noun like an adjective, it is a participle and it changes for gender and number. The two are drilled side by side on Supine vs. Past Participle.
Why a separate supine exists
It is worth understanding why Swedish bothers with a distinct supine, because it makes the form feel less arbitrary. Historically the supine and the neuter participle were the same word (the neuter participle ended in -it / -et), but Swedish let the two drift apart and specialise. The form after ha froze into a single invariable shape — it stopped agreeing because it no longer described a noun; it had become part of the verb. The participle kept agreeing because it stayed an adjective. So the split reflects a real difference in job: the supine is part of a verb phrase (it carries tense with ha), while the participle is a describer of nouns. Once you see that the supine is "verb business" and the participle is "noun business," remembering which is invariable becomes intuitive.
Common Mistakes
❌ Jag har skriven ett brev.
Incorrect — skriven is the agreeing participle. After har you need the supine: skrivit.
✅ Jag har skrivit ett brev.
I have written a letter.
❌ Hon har stängd dörren.
Incorrect — stängd is the participle (agrees with the noun). After har, use the supine stängt.
✅ Hon har stängt dörren.
She has closed the door.
❌ De har ätna middag.
Incorrect — there's no agreement after har. The supine is invariable: ätit.
✅ De har ätit middag.
They have eaten dinner.
❌ Boken är skrivit på svenska.
Incorrect — describing the noun needs the participle skriven, not the supine skrivit.
✅ Boken är skriven på svenska.
The book is written in Swedish.
Key Takeaways
- The supine is the verb form used after ha to build the perfect (har talat) and pluperfect (hade talat).
- It is completely invariable — one fixed form, no agreement for gender or number ever.
- Endings by group: -at (G1), -t (G2), -tt (G3), -it (G4 strong).
- The supine is not the past participle. English uses one word for both ("written"); Swedish uses the invariable supine after ha (skrivit) and the agreeing participle as an adjective (skriven).
- Rule of thumb: after ha → supine (frozen); describing a noun → participle (agrees).
Related Topics
- Supine: Groups 1-2 (-at, -t)A2 — The weak-verb supines: Group 1 adds -at (talat, arbetat, frågat) and Group 2 adds -t to the stem (köpt, läst, ringt). Both are invariable forms used after 'ha'. The main trap is Group 1's dangerous trio — past -ade, supine -at, participle -ad differ by one letter (talade / talat / talad) and are constantly confused. Laying all three side by side is the cure.
- Supine: Strong Verbs (-it)B1 — Strong verbs form their supine in -it on a stem whose vowel can differ from BOTH the infinitive and the past tense — skriva / skrev / skrivit, dricka / drack / druckit, sjunga / sjöng / sjungit. So a strong verb has THREE vowel grades, and the supine vowel must be memorised as its own principal part. Don't reuse the past-tense vowel, and don't confuse the supine -it with the participle -en (skrivit vs. skriven).
- Supine vs Past ParticipleB1 — The single Swedish verb-form distinction English has no equivalent for: the supine (har skrivit — fixed, invariable, only after ha) versus the past participle (en skriven bok, ett skrivet brev, skrivna böcker — fully agreeing, used as adjective and in the passive). English collapses both into one '-en' word; Swedish splits them, and confusing the two (*har skriven, *en skrivit bok) is a hallmark learner error.
- The Past Participle (Agreeing Form)B1 — The past participle (perfektparticip) is the form that AGREES with its noun — målad/målat/målade, skriven/skrivet/skrivna — and is used as an adjective and in the bli/vara-passive. It is a different word from the supine (skrivit), even when they come from the same verb, and strong verbs often show a different vowel in the two: supine skrivit but participle skriven.