The synthetic Konjunktiv II is the one-word subjunctive — wäre, hätte, käme, ginge, wüsste — as opposed to the analytic würde + infinitive. Mastering it is what makes your German sound educated rather than merely correct: these forms are the preferred choice for the highest-frequency verbs in both speech and writing, and they are unavoidable in formal registers. The good news is that the formation rule is mechanical. The subtle part — the part competitors skip — is understanding which verbs keep their synthetic form and why the rest cede to würde.
The formation rule
To build the synthetic Konjunktiv II of any verb:
- Take the Präteritum (simple past) stem.
- If the stem vowel is a, o, or u, add an umlaut (a → ä, o → ö, u → ü).
- Add the Konjunktiv II endings: -e, -est, -e, -en, -et, -en.
So kommen → Präteritum kam → add umlaut käm- → add endings käme, kämest, käme, kämen, kämet, kämen.
| Person | kommen → käme | gehen → ginge | sein → wäre |
|---|---|---|---|
| ich | käme | ginge | wäre |
| du | kämest | gingest | wärst (wärest) |
| er / sie / es | käme | ginge | wäre |
| wir | kämen | gingen | wären |
| ihr | kämet | ginget | wärt (wäret) |
| sie / Sie | kämen | gingen | wären |
Note that gehen → ging has the vowel i, which cannot take an umlaut, so ginge simply adds the ending. The umlaut only applies to a/o/u.
Wenn er früher käme, wäre noch genug zu essen da.
If he came earlier, there'd still be enough to eat. (käme + wäre — both synthetic)
Ich ginge ja gern mit, aber ich bin völlig erschöpft.
I'd gladly come along, but I'm completely exhausted. (ginge — literary/careful register)
The high-frequency strong verbs to know
These are the synthetic forms that genuinely live in modern German. Learn them as vocabulary — they are too frequent to derive on the fly:
| Infinitive | Präteritum | Konjunktiv II (ich/er) | English |
|---|---|---|---|
| sein | war | wäre | would be |
| haben | hatte | hätte | would have |
| werden | wurde | würde | would (become) |
| kommen | kam | käme | would come |
| gehen | ging | ginge | would go |
| geben | gab | gäbe | would give |
| wissen | wusste | wüsste | would know |
| finden | fand | fände | would find |
| nehmen | nahm | nähme | would take |
| lesen | las | läse | would read |
| bleiben | blieb | bliebe | would stay |
| lassen | ließ | ließe | would let |
| tun | tat | täte | would do |
Es gäbe da noch ein Problem, über das wir reden müssten.
There'd be one more problem we'd have to talk about. (gäbe — common in careful speech)
Wenn ich das wüsste, wäre ich schon längst reich.
If I knew that, I'd have been rich long ago. (wüsste — very common, the standard form)
Das täte mir wirklich leid.
I'd really be sorry about that. (täte — somewhat formal/careful)
An deiner Stelle nähme ich das Angebot an.
In your shoes I'd accept the offer. (nähme — formal/literary; in speech often 'würde ich annehmen')
Why weak verbs surrender to würde
Here is the asymmetry that explains the whole system. Apply the formation rule to a weak verb and watch what happens. Take machen → Präteritum machte. The stem vowel is a… but it is part of ach, and weak verbs do not take an umlaut in Konjunktiv II. The Konjunktiv II is therefore machte — identical to the past tense.
| Weak verb | Präteritum | Konjunktiv II | Distinguishable? |
|---|---|---|---|
| machen | machte | machte | No — identical |
| kaufen | kaufte | kaufte | No — identical |
| sagen | sagte | sagte | No — identical |
| spielen | spielte | spielte | No — identical |
Because Wenn ich es kaufte could just as easily be read as a past indicative ("when I bought it"), the synthetic form is useless for signalling the subjunctive. German therefore replaces it with the unambiguous würde + infinitive: Wenn ich es kaufen würde.
This is the deep insight: synthetic Konjunktiv II survives precisely for the verbs whose form is distinct from the past (the strong verbs and sein/haben, whose umlaut sets them apart — wäre ≠ war, käme ≠ kam). The weak verbs, whose subjunctive collapses into the past, are exactly the ones that cede to würde.
Wenn ich im Lotto gewinnen würde, würde ich die Welt bereisen.
If I won the lottery, I'd travel the world. (gewinnen and bereisen are weak/regular — würde keeps them clear)
Register: when to reach for the synthetic form
- Always synthetic: sein, haben, werden and the modals (wäre, hätte, würde, könnte, müsste). Using würde with these is an error, not a register choice.
- Synthetic preferred in writing, würde fine in speech: the common strong verbs (käme, ginge, gäbe, fände, ließe, bliebe). Forms like nähme, läse, täte sound increasingly literary or old-fashioned in casual speech.
- Always würde: weak/regular verbs (würde machen, würde kaufen, würde arbeiten).
Es wäre schön, wenn du bliebest.
It'd be nice if you stayed. (bliebest — literary; in speech: 'wenn du bleiben würdest')
Common Mistakes
❌ Wenn ich es kaufte, wäre ich pleite.
Incorrect/ambiguous — 'kaufte' reads as a past indicative, not a hypothetical.
✅ Wenn ich es kaufen würde, wäre ich pleite.
Correct — weak verbs use würde + infinitive to stay unambiguous.
❌ Ich würde wäre froh.
Incorrect — sein already has its synthetic form; don't add würde.
✅ Ich wäre froh.
Correct — wäre is the complete Konjunktiv II of sein.
❌ Wenn er das wisste, ...
Incorrect — wissen has an umlaut in Konjunktiv II.
✅ Wenn er das wüsste, ...
Correct — wusste (past) → wüsste (Konjunktiv II) with umlaut.
❌ Es gabe ein Problem.
Incorrect — missing the umlaut that marks the subjunctive.
✅ Es gäbe ein Problem.
Correct — gab (past) → gäbe (Konjunktiv II).
Key Takeaways
- Build it from the Präteritum stem + umlaut (a/o/u only) + endings -e/-est/-e/-en/-et/-en.
- The umlaut is what makes a strong-verb form distinct from the past — and that distinctness is why it survives.
- Weak verbs produce a form identical to the past (machte = machte), so they default to würde + infinitive.
- Memorize the high-frequency set (wäre, hätte, käme, ginge, gäbe, wüsste, fände, bliebe, ließe); these are the ones you'll actually use.
Compare this with the würde-paraphrase it competes with, and see the modal forms, which follow the same umlaut logic.
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Start learning German→Related Topics
- Konjunktiv II: Hypotheticals, Wishes, and PolitenessB1 — The German mood for the unreal — hypotheticals, wishes, and the everyday politeness behind hätte gern, könnten Sie, and würden Sie.
- The würde + Infinitive FormB1 — How to build the everyday spoken Konjunktiv II with würde plus an infinitive — and the sein/haben/modal verbs that refuse it.
- Konjunktiv II of Modal VerbsB1 — könnte, müsste, dürfte, sollte, möchte — the high-frequency modal subjunctives behind polite and tentative German, and the umlaut that separates them from the plain past.
- Unreal Present Conditions (Type 2)B2 — Hypothetical present conditions in German — wenn + Konjunktiv II in the condition, würde or Konjunktiv II in the result, and the canonical synthetic-wenn-clause-plus-würde-result pattern.
- Präteritum of sein, haben, werden, and ModalsA2 — The simple-past forms used even in everyday spoken German: war, hatte, wurde, and the umlaut-less modals konnte, musste, durfte, wollte, sollte, mochte.