There is one Icelandic error so widespread among English speakers that it deserves a catalogue of its own: leaving the verb in the indicative where the grammar requires the subjunctive. Note the shape of the mistake — it is not that learners misform the subjunctive (that is a smaller, separate problem). It is that they don't reach for it at all, defaulting to the plain indicative everywhere, because English's own subjunctive is all but dead and offers no warning signal. The cure is not memorising verb endings; it is recognising the triggers. A short, learnable list of contexts demands the subjunctive in Icelandic — reporting, wishing, conceding, expressing purpose, asking indirectly, doubting — and the moment you can spot one of these, your hand should go automatically to the -i present subjunctive (komi, sé, skiljir) or the umlauted past subjunctive (væri, kæmi). This page is that trigger-recognition drill: ten incorrect→corrected pairs, grouped by what set the subjunctive off, so you learn to feel the trigger before you choose the mood. (For the underlying logic and the full paradigms, see the subjunctive overview and the conjunctions that trigger it.)
Why omission is THE error
English collapsed its subjunctive centuries ago. "He says she is ill" and "I hope you pass" use ordinary indicative forms; the one fossil that survives ("if I were") is so isolated that speakers barely register it as a mood. So an English speaker carries no internal alarm that says "this clause needs a special verb form." Icelandic, by contrast, keeps a living subjunctive and requires it after a defined set of triggers. The result is predictable: English speakers transfer their moodless habit wholesale and produce the indicative everywhere, which in Icelandic is not a minor slip but a grammatical error that marks the clause as asserted-fact when it should be marked as reported, wished, conceded, or doubted. The fix is to stop thinking "what tense?" and start thinking "is there a trigger?" — and the triggers, gathered below, are a closed and memorable list.
Trigger 1: reported speech (segja, halda að)
When you relay what someone says or thinks in an að-clause, that clause goes subjunctive. A present matrix verb gives the present subjunctive (sé, komi); a past matrix verb forces a backshift to the past subjunctive (væri, kæmi). English speakers reliably backshift the tense but forget to switch the mood.
❌ Hún sagði að hún er þreytt.
Incorrect — a past reporting verb ('sagði') backshifts to the past subjunctive: 'væri', not the indicative 'er'.
✅ Hún sagði að hún væri þreytt.
She said she was tired. Past subjunctive 'væri' (umlaut form of 'vera').
❌ Hann heldur að ég veit svarið.
Incorrect — 'halda að' (think that) takes the subjunctive: present 'viti', not the indicative 'veit'. He merely thinks it.
✅ Hann heldur að ég viti svarið.
He thinks I know the answer. Present subjunctive 'viti' (from 'vita').
Trigger 2: wishes and hopes (vona, vilja, óska að)
Verbs of wanting, hoping, and wishing project an action that is not yet a fact — it is desired — so the að-clause takes the subjunctive. This is the cleanest case of the subjunctive's core meaning: marking what is wished rather than what is.
❌ Ég vona að þú kemur á morgun.
Incorrect — 'vona að' (hope that) takes the subjunctive: 'komir', not the indicative 'kemur'.
✅ Ég vona að þú komir á morgun.
I hope you'll come tomorrow. Present subjunctive 'komir' (2sg of 'koma').
❌ Ég vil að þú hjálpar mér með þetta.
Incorrect — 'vilja að' (want that) expresses a wish about someone else's action → subjunctive 'hjálpir', not 'hjálpar'.
✅ Ég vil að þú hjálpir mér með þetta.
I want you to help me with this. Present subjunctive 'hjálpir' (from 'hjálpa').
Trigger 3: concession (þótt, þó að)
The concessive conjunctions þótt and þó að "although, even though" set up a contrast — "even granting that X" — and X is presented not as a flat assertion but as a conceded point, so the clause is subjunctive. This is one of the most reliably missed triggers, because in English "although he is rich" is plain indicative.
❌ Þótt hann er ríkur er hann ekki hamingjusamur.
Incorrect — 'þótt' (although) governs the subjunctive: 'sé', not the indicative 'er'.
✅ Þótt hann sé ríkur er hann ekki hamingjusamur.
Although he's rich, he isn't happy. Present subjunctive 'sé'.
❌ Þó að það rignir ætlum við að fara í gönguna.
Incorrect — 'þó að' (even though) takes the subjunctive: 'rigni', not the indicative 'rignir'.
✅ Þó að það rigni ætlum við að fara í gönguna.
Even though it's raining, we're going on the walk. Present subjunctive 'rigni'.
Trigger 4: purpose (svo að, til þess að)
Purpose clauses introduced by svo að or til þess að "so that, in order that" describe an intended, not-yet-real result, so they take the subjunctive. English "so that you understand" hides the mood; Icelandic exposes it with the -i ending.
❌ Ég útskýri þetta aftur svo að þú skilur.
Incorrect — 'svo að' (so that) is a purpose clause → subjunctive 'skiljir', not the indicative 'skilur'.
✅ Ég útskýri þetta aftur svo að þú skiljir.
I'll explain this again so that you understand. Present subjunctive 'skiljir' (from 'skilja').
❌ Hún talaði hægt til þess að allir náðu þessu.
Incorrect — 'til þess að' (in order that) takes the subjunctive, and a past matrix backshifts: 'næðu', not the indicative 'náðu'.
✅ Hún talaði hægt til þess að allir næðu þessu.
She spoke slowly so that everyone would get it. Past subjunctive 'næðu' (from 'ná').
Trigger 5: indirect questions (hvort, wh-words)
A reported yes/no question uses hvort "whether"; a reported wh-question keeps its wh-word. Either way the embedded verb goes subjunctive, with the same present/past tense tracking as ordinary reported speech.
❌ Ég veit ekki hvort hann kemur í kvöld.
Incorrect — an indirect question after 'hvort' takes the subjunctive: 'komi', not the indicative 'kemur'. (The doubt of 'I don't know' reinforces it.)
✅ Ég veit ekki hvort hann komi í kvöld.
I don't know whether he's coming tonight. Present subjunctive 'komi'.
How to drill the fix
The forms you swap in are not many. The present subjunctive is the -i set — 2sg/3sg komi, fari, skiljir, hjálpir, rigni, viti, and the irregular sé for vera "be". The past subjunctive is the umlauted set — væri (be), kæmi (come), færi (go/do), næði (reach), hefði (have) — and it appears whenever the triggering verb is itself in the past (backshift). Two habits close the gap for good. First, when you hear yourself starting a clause with að, þótt, þó að, svo að, til þess að, hvort, treat that word as a red flag and finish with a subjunctive. Second, drill the present↔past pairs as units — sé → væri, komi → kæmi, fari → færi — so that as soon as your matrix verb is past, the past subjunctive comes automatically. Once the triggers are reflexive, omission disappears.
The full catalogue at a glance
| Trigger | Signal word(s) | ❌ Indicative | ✅ Subjunctive |
|---|---|---|---|
| Reported speech | segja/halda að | sagði að hún er | sagði að hún væri |
| Wish / hope | vona, vilja, óska að | vona að þú kemur | vona að þú komir |
| Concession | þótt, þó að | þótt hann er | þótt hann sé |
| Purpose | svo að, til þess að | svo að þú skilur | svo að þú skiljir |
| Indirect question | hvort, wh-words | hvort hann kemur | hvort hann komi |
Key Takeaways
- The dominant intermediate-to-advanced error is omission, not misformation: defaulting to the indicative where the subjunctive is required, because English's subjunctive is dead.
- The fix is trigger recognition, not memorising endings. The closed list: report (segja/halda að), wish/hope (vona, vilja, óska að), concession (þótt, þó að), purpose (svo að, til þess að), indirect question (hvort, wh-words), doubt.
- Use the present subjunctive (-i: komi, skiljir, viti; irregular sé) under a present matrix verb, and the past subjunctive (umlaut: væri, kæmi, færi, næði) under a past one (backshift).
- Treat að, þótt, þó að, svo að, til þess að, hvort as red-flag words: starting a clause with one means finishing it with a subjunctive.
- Drill the present↔past pairs (sé→væri, komi→kæmi) as units, so the backshift is automatic.
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Start learning Icelandic→Related Topics
- The Subjunctive (viðtengingarháttur): OverviewB1 — An orientation to the Icelandic subjunctive mood — a living, everyday part of the language, not a literary relic — covering its four big triggers (reported speech, conditionals, wishes/hopes, and certain conjunctions) and why English speakers, with only a vestigial subjunctive of their own, systematically and audibly leave it out.
- Mood and Tense ErrorsB2 — A catalogue of the verb-mood and verb-tense slips English speakers make in Icelandic — indicative where the subjunctive is required (reported speech, counterfactuals, þótt/svo að), and the perfect where the preterite belongs (with past-time adverbs). Two distinct root causes: English's dead subjunctive feeds the mood errors; English's looser perfect feeds the tense errors.
- Subjunctive After Conjunctions (þótt, svo að, áður en)B2 — The subordinating conjunctions that govern the subjunctive: concessive þótt / þó að 'although' (þótt hann sé ríkur), purpose svo að / til þess að 'so that' (svo að þú skiljir), conditional nema 'unless' (nema þú komir), and áður en 'before' in some uses. These clauses take the subjunctive because their content is NOT asserted as fact. Includes the meaning-bearing contrast svo að + subjunctive (purpose) vs svo að + indicative (result), and the subtle trap of þó (sentence adverb 'however') versus þó að / þótt (concessive conjunction).
- Subjunctive in Reported SpeechB1 — The single most frequent subjunctive trigger in Icelandic: indirect speech introduced by að (and hvort/wh-words) after verbs of saying, thinking, hoping, and asking. The reported clause goes into the subjunctive to mark that the content is REPORTED, not asserted — present subjunctive (sé, komi, fari) under a present matrix verb, past subjunctive (væri, kæmi, færi) under a past one (backshift). Indicative can creep in for facts the speaker personally vouches for, making the mood a subtle evidentiality device.
- Subjunctive in Wishes, Hopes, and CommandsB2 — The optative subjunctive: wishes (ég vildi að þú værir hér 'I wish you were here'), hopes (ég vona að þú komir), blessings, curses and fixed formulae (guð blessi þig, lengi lifi…, verði þér að góðu), and third-person imperatives (komi sá sem vill). Verbs of wishing/hoping/fearing take a subjunctive complement; fixed optative formulae survive as frozen present subjunctives; and the PAST subjunctive marks the unattainable wish.