The Subjunctive (viðtengingarháttur): Overview

The subjunctive mood — viðtengingarháttur in Icelandic — is one of the points where English speakers most consistently go wrong, and the reason is instructive. English has only a vestigial subjunctive: a few fossils like "if I were you", "I demand that he be present", "God save the Queen". Because these feel marginal and old-fashioned, English speakers learn to ignore mood, and then carry that habit into Icelandic — where it is exactly the wrong instinct. In Icelandic the subjunctive is alive, productive, and obligatory in whole families of everyday sentences. It has both a present and a past subjunctive, and choosing it (or failing to) changes the meaning and the social tone of what you say. This page introduces the mood and its four big triggers; the form tables and each individual use have their own pages.

What the subjunctive does

The indicative states things as facts: hún kemur "she is coming / she comes" reports reality. The subjunctive marks the verb as not asserted as fact — as reported by someone else, hypothetical, wished-for, doubted, or merely entertained. It is the grammar of the non-factual. When you say Ég vona að hún komi "I hope she comes", her coming is not (yet) a fact; it lives in the realm of hope, and the subjunctive komi signals exactly that. Once you internalise "subjunctive = the speaker is not vouching for this as established reality", you can predict where it belongs even in sentences you have never met.

Icelandic has two subjunctive tenses, present and past, and both are in everyday use. Roughly, the present subjunctive handles open, still-possible situations (komi "(that) she come"), while the past subjunctive handles the more remote, hypothetical, or counterfactual (kæmi "(if/that) she came / would come"). Here is the contrast for the two verbs you will use most, vera "be" and koma "come":

Notice the shapes. The present subjunctive centres on -i (komi, fari, sé); the past subjunctive typically shows a vowel change (umlaut) plus -i (væri from var, kæmi from kom, færi from fór). These forms are distinctive enough that natives hear instantly whether you used them — which is why omitting them is so audible.

Trigger 1: reported (indirect) speech

When you report what someone said, thought, claimed, or asked in a subordinate að-clause, Icelandic shifts the embedded verb into the subjunctive. This is the single most pervasive trigger, and the one English speakers miss most, because English just keeps the indicative ("He said that he was tired"). Icelandic uses the subjunctive to flag that the content is reported, not the speaker's own assertion.

The subjunctive here does real work: it signals that you are relaying someone else's words or thoughts, not committing to their truth. Reported speech has a dedicated page that drills the tense shifts.

Trigger 2: conditionals

In hypothetical and counterfactual conditions — English "if I were…" — Icelandic uses the past subjunctive in both the if-clause and (often, with myndi or a past subjunctive) the result clause. This is the one place English still clearly preserves its own subjunctive, which makes it the easiest trigger to learn.

Compare a real, open condition, which can stay in the indicative: Ef það rignir, verðum við heima "If it rains, we'll stay home" — a genuine possibility, not a hypothesis. The split between hypothetical (subjunctive) and open (indicative) conditions is exactly the kind of meaning the mood carries; it has its own page.

Trigger 3: wishes and hopes

Verbs of wishing, hoping, wanting, and fearing put their að-clause in the subjunctive, because what you wish for is by definition not yet a fact. Ég vona að þú komir "I hope you come" uses the present subjunctive komir; the hope is precisely that the not-yet-real becomes real.

The pattern generalises: vona "hope", vilja að "want (that)", óska þess að "wish that", óttast að "fear that" — anything that frames a clause as desired, dreaded, or merely possible rather than asserted. Wishes have a dedicated page.

Trigger 4: certain conjunctions

Finally, a set of subordinating conjunctions simply demands the subjunctive in the clause they introduce, because of their inherent meaning. The clearest are þótt / þó að "although, even though" (concession — granting something hypothetically) and svo að / til þess að "so that, in order that" (purpose — an as-yet-unrealised goal).

In both, the clause describes something not asserted as fact — a concession granted for argument's sake, or a goal not yet achieved — which is precisely the subjunctive's territory. The full list of subjunctive-triggering conjunctions has its own page.

Why English speakers get this wrong

The root problem is transfer: English collapses most of these distinctions into the indicative ("He said he was tired", "I hope you come", "even though it rains"), so English speakers, hearing nothing special in their own grammar, default to the Icelandic indicative everywhere. The result is not gibberish — you will be understood — but it is the single most systematic error in learner Icelandic, and it has a tone. Skipping the subjunctive in reported speech makes you sound as if you are vouching for the claim yourself; skipping it after vona or þótt sounds blunt and slightly off, the way "I demand that he is present" sounds off to a careful English ear. The subjunctive is not decoration; it is meaning-bearing and obligatory.

Common Mistakes

The indicative var asserts the tiredness as fact in your own voice; reported speech needs the subjunctive væri to flag that you are relaying his words.

A hope is non-factual by nature, so the að-clause goes into the present subjunctive komir.

This is the exact mirror of English "if I were", and the one trigger English still marks — so there's no excuse to use the indicative var here.

Concessive þótt / þó að governs the subjunctive because it grants its clause hypothetically rather than asserting it.

A purpose is an unrealised goal, so the clause after svo að / til þess að takes the subjunctive.

Key Takeaways

• The subjunctive (viðtengingarháttur) is a living, obligatory mood in everyday Icelandic — not a literary relic — with both a present and a past form.
• Forms: present subjunctive centres on -i (komi, sé); past subjunctive shows umlaut + -i (væri, kæmi, færi) and marks the more remote/counterfactual.
• Four big triggers: reported speech (sagði að hann væri), hypothetical conditionals (ef ég væri), wishes/hopes (vona að þú komir), and certain conjunctions (þótt, svo að).
• The mood is meaning-bearing: it signals reportedness, hypothesis, and non-factivity; using the indicative instead changes the meaning and sounds blunt.
• English's near-empty subjunctive makes omission the most systematic learner error — train yourself to switch moods at these triggers rather than defaulting to the indicative.