Group 3 is the smallest weak class: a handful of very common verbs whose infinitive ends in a stressed vowel rather than in -a. Think bo (live), tro (believe), sy (sew), klä (dress). Because there's no consonant stem to attach an ending to, these verbs build the preteritum with a distinctive doubled -dde: bo → bodde, tro → trodde. The supine doubles too, ending in -tt: bott, trott. Those double letters look strange at first, but they aren't decoration — they're the Swedish vowel-length system doing exactly what it always does.
The rule: add -dde to the vowel-final stem
A Group 3 verb is monosyllabic (or stressed on the final syllable) and ends in a vowel. To form the preteritum, add -dde straight onto that vowel:
| Infinitive | Preteritum (-dde) | Supine (-tt) | English |
|---|---|---|---|
| bo | bodde | bott | live / reside |
| tro | trodde | trott | believe / think |
| sy | sydde | sytt | sew(ed) |
| klä | klädde | klätt | dress(ed) |
| ske | skedde | skett | happen(ed) |
| nå | nådde | nått | reach(ed) |
So the present is bor, the past is bodde, and the supine (after har) is bott: jag bor / jag bodde / jag har bott. The pattern is wonderfully regular within the group — once you know it goes -dde in the past and -tt in the supine, every Group 3 verb behaves the same way. (Ske is the one to note for register: skedde, "happened/occurred," is somewhat (formal) and shows up far more in writing and news than in casual speech.)
Vi bodde i samma hus i tolv år innan vi flyttade.
We lived in the same house for twelve years before we moved. bodde — Group 3, -dde past.
Jag trodde att du redan hade åkt.
I thought you'd already left. trodde — the past of tro.
Why the d doubles: the length system, not arbitrariness
The double d is the part that surprises learners, but it follows from a rule that runs through all of Swedish spelling: a short, stressed vowel must be followed by a doubled consonant. Swedish vowels come in two lengths, and the spelling signals which is which by the consonant that follows — one consonant after a stressed vowel means the vowel is long; two (or a cluster) mean it's short.
In the infinitive bo, the o is long (drawn out: "boo"). But when you add the dental ending in the past, the vowel shortens, and a short stressed vowel demands a double consonant behind it in writing — hence bo-dde with two d's, and the supine bo-tt with two t's. The doubling isn't a quirk of these particular verbs; it's the same machinery that gives you katt, kall, and vill. So rather than memorising "-dde" as a random ending, see it as: the ending is -de, and the vowel-shortening triggers the spelling double — the very rule covered on Double Consonants.
Hon sydde sin egen klänning till studentbalen.
She sewed her own dress for the graduation ball. sydde — sy → sydde.
Barnen klädde av sig och hoppade rakt i sjön.
The kids took off their clothes and jumped straight into the lake. klädde av sig — klä → klädde.
Vi nådde toppen precis när solen gick ner.
We reached the summit just as the sun went down. nådde — nå → nådde.
Olyckan skedde mitt i natten, när alla sov.
The accident happened in the middle of the night, when everyone was asleep. skedde — ske → skedde (somewhat formal).
How Group 3 differs from the other weak groups
It's worth pausing on what makes Group 3 its own class rather than a variant of Group 2. The other weak verbs have a consonant stem to build on — ringa gives you ring-, köpa gives you köp- — so the dental ending lands on a consonant (ringde, köpte). Group 3 verbs have nothing but a vowel before the ending, because there's no infinitive -a to strip and no final consonant underneath it. The doubled -dde is the language's way of attaching a dental past to a bare vowel while still signalling that the vowel has gone short. That's also why English speakers can't fall back on the -de/-te voicing intuition here: there's no final stem consonant to be voiced or voiceless, so the choice simply doesn't arise — Group 3 is uniformly -dde.
Present vs past vs supine, side by side
Because the present is just -r on the vowel (bor, tror, syr), the three forms are easy to confuse if you only learn one. Always learn the trio together:
| Infinitive | Present (-r) | Preteritum (-dde) | Supine (-tt) |
|---|---|---|---|
| bo | bor | bodde | har bott |
| tro | tror | trodde | har trott |
| klä | klär | klädde | har klätt |
Jag bor här nu, jag bodde i Malmö förut, och innan dess har jag bott utomlands.
I live here now, I lived in Malmö before, and before that I've lived abroad. bor / bodde / har bott — all three forms of bo.
Common Mistakes
❌ Vi bode i Stockholm.
Incorrect — Group 3 doubles the consonant: the short vowel forces -dde, so bodde.
✅ Vi bodde i Stockholm.
We lived in Stockholm.
❌ Jag troade att du var hemma.
Incorrect — that's a Group 1 ending. Tro is Group 3: trodde.
✅ Jag trodde att du var hemma.
I thought you were home.
❌ Hon har bodde här länge.
Incorrect — after 'har' you need the supine bott, not the preteritum bodde.
✅ Hon har bott här länge.
She has lived here a long time.
❌ Vi nådde toppen och hade nådde målet.
Incorrect — the supine of nå is nått (-tt), not the preteritum form again.
✅ Vi nådde toppen och hade nått målet.
We reached the summit and had reached the goal.
Key Takeaways
- Group 3 verbs end in a stressed vowel (bo, tro, sy, klä, ske, nå) and form the preteritum by adding -dde: bodde, trodde, sydde, klädde.
- The supine ends in -tt: bott, trott, sytt, klätt — and you must learn it separately, because har bodde is wrong.
- The double d and t are not arbitrary: a short stressed vowel is always written with a following double consonant — the same length rule behind katt and vill.
- Learn each verb as a trio — present (-r) / preteritum (-dde) / supine (-tt): bor / bodde / har bott.
- The verb ske → skedde ("happen") is somewhat (formal) and far commoner in writing than in speech.
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- Present Tense: Group 3 (Short Verbs)A2 — Group 3 is the small class of short verbs whose infinitive ends in a stressed vowel — bo, tro, sy, må. The present is the easiest in the language: just add -r straight onto the vowel (bor, tror, mår). This page covers the rule, the high-frequency members, and why må unlocks the everyday phrase Hur mår du?
- Supine: Group 3 (-tt)B1 — Group 3 verbs are short, vowel-final verbs (bo, tro, sy, klä) whose supine adds a doubled -tt: bo → bott, tro → trott, sy → sytt, klä → klätt. The double t is not random — it spells the short stem vowel, exactly as the past -dde does. So the whole paradigm bor / bodde / bott is internally consistent once you see the short-vowel length rule.
- The Past Tense (Preteritum): OverviewA2 — Preteritum is the simple past — the narrative tense for completed, time-anchored events (Igår åkte jag till Stockholm). It needs no auxiliary, unlike the perfect, and lines up neatly with the English simple past. This page maps its uses and previews the four-group formation, leaving the endings to the per-group pages.
- Double ConsonantsA2 — A doubled consonant marks a short, stressed vowel before it (vit vs vitt, glas vs glass). The doubling simplifies before another consonant (känna → känt) and the letters m and n break the rule at the end of a word — a stubborn exception that trips up even advanced learners.