You already know the A1 rule: ekki goes after the verb (Ég veit ekki). That rule is true for simple main clauses, but Icelandic places ekki in three noticeably different positions depending on the clause type and on whether there's an auxiliary. Getting these right is what makes negation sound native rather than learner-flat. This page is a placement drill across the three cases: simple main clauses (ekki after the finite verb), subordinate clauses (ekki can precede the finite verb), and compound tenses (ekki sits between auxiliary and main verb). The same logic governs the other sentence adverbs — aldrei, oft, líklega, því miður — so once ekki clicks, they all fall into place.
Case 1: main clause — ekki follows the finite verb
In a plain main clause with a single verb, ekki lands immediately after the finite verb. This is the rule from A1, restated as the baseline.
Hann kemur ekki í kvöld.
He's not coming tonight. — single verb kemur, then ekki.
Ég skil þetta ekki.
I don't understand this. — verb skil; ekki follows (after the object pronoun þetta, which shifts forward).
Þetta er ekki nógu gott.
This isn't good enough. — er, then ekki.
The one wrinkle even here: a short unstressed pronoun object can slip in front of ekki (this is "object shift"), giving Ég skil það ekki rather than Ég skil ekki það. But ekki still sits in its post-verbal region; it just lets a light pronoun hop ahead of it. The headline holds: in main clauses, the verb comes before ekki.
Case 2: subordinate clause — ekki can precede the finite verb
Inside a subordinate clause (after að, ef, þegar, af því að, a relative sem, and so on), the picture changes. The verb is no longer lifted to second position, and ekki can sit before the finite verb. There are two registers:
- Careful / formal / written: ekki before the verb — … að hann *ekki komi*.
- Colloquial / everyday: ekki after the verb — … að hann kemur ekki / … að hann komi ekki.
Both are heard; the pre-verbal order is the conservative standard, the post-verbal order is what dominates ordinary speech.
| Register | Subordinate order |
|---|---|
| Colloquial | … að hann kemur ekki |
| Careful / formal | … að hann ekki kemur |
Ég held að hún komi ekki.
I think she's not coming. — colloquial: verb komi, then ekki.
Það er vitað að hann mætti ekki á fundinn.
It's known that he didn't show up to the meeting. — colloquial post-verbal ekki.
Hann lofaði að hann skyldi ekki segja neinum frá.
He promised that he wouldn't tell anyone. — að-clause, ekki after the modal skyldi.
And the same content in the careful pre-verbal register, where ekki leads the verb:
Það er skýrt tekið fram að þetta gildi ekki um alla.
It is clearly stated that this does not apply to everyone. — formal written; here ekki could equally precede gildi (að þetta ekki gildi).
Case 3: compound verbs — ekki goes between auxiliary and main verb
When the verb is compound — perfect (hafa + supine), modal + infinitive, future munu + infinitive — there is a finite auxiliary and a non-finite main verb. ekki slots between them: after the auxiliary, before the supine or infinitive. This is the position English uses too, which makes it the one case where your English intuition helps.
| Subject | Auxiliary | ekki | Main verb |
|---|---|---|---|
| Ég | hef | ekki | séð hana. |
| Þú | mátt | ekki | fara. |
| Hún | mun | ekki | koma. |
Ég hef ekki séð hana lengi.
I haven't seen her in a long time. — hef (aux) + ekki + séð (supine). Compare English 'have not seen'.
Þú mátt ekki fara strax.
You mustn't leave right away. — modal mátt + ekki + infinitive fara.
Við höfum ekki ákveðið neitt ennþá.
We haven't decided anything yet. — höfum + ekki + supine ákveðið.
Line up the English and the Icelandic: "I have not seen her" → Ég *hef ekki séð hana. The *ekki and the "not" sit in exactly the same place — right after the auxiliary, right before the participle. This is worth noticing precisely because it's the exception to the usual "Icelandic puts the negation where English wouldn't." With an auxiliary, the two languages agree.
What never happens: ekki at the very end
The one position ekki essentially never takes in these structures is clause-final, after the non-finite verb. Hann hefur komið ekki is wrong; the supine komið must be the last word, with ekki in front of it. English speakers sometimes produce the end-position error by analogy with "he hasn't come" → mentally "he has come not," but Icelandic, like correct English, keeps ekki before the participle.
Hún hefur ekki hringt í mig.
She hasn't called me. — ekki before the supine hringt, not after it.
Putting it together
Watch ekki move as the same idea changes shape — main clause, subordinate clause, compound tense:
Hann kemur ekki.
He's not coming. — main clause, single verb: verb + ekki.
Ég held að hann komi ekki.
I think he's not coming. — subordinate (colloquial): komi + ekki; careful style allows að hann ekki komi.
Hann hefur ekki komið.
He hasn't come. — compound: aux hefur + ekki + supine komið.
Three positions, one underlying system: ekki attaches to the finite verb's region — after it in a main clause, optionally before it in a subordinate clause, and immediately after the finite auxiliary (hence before the non-finite verb) in a compound tense.
Common Mistakes
❌ Hann hefur komið ekki.
Incorrect — ekki can't sit at the very end after the supine; it goes between aux and main verb.
✅ Hann hefur ekki komið.
He hasn't come. — hefur + ekki + komið.
The end-position error. In a compound tense, ekki slots after the auxiliary and before the participle — exactly like "has not come."
❌ Ég ekki sé hana.
Incorrect — in a main clause the verb comes before ekki.
✅ Ég sé hana ekki.
I don't see her. — verb sé first; ekki follows (the pronoun hana shifts ahead of it).
Pre-verbal ekki is a subordinate-clause option, not a main-clause one. In a main clause, the finite verb always precedes ekki.
❌ Ég veit að hún ekki kemur (intended as casual speech).
Register mismatch — pre-verbal ekki is careful/formal; in casual speech use hún kemur ekki.
✅ Ég veit að hún kemur ekki.
I know she's not coming. — natural everyday subordinate order: verb + ekki.
The pre-verbal subordinate order isn't wrong, but it's the conservative/written register. In ordinary conversation, kemur ekki is the unmarked choice.
❌ Þú mátt fara ekki.
Incorrect — with a modal, ekki goes between the modal and the infinitive.
✅ Þú mátt ekki fara.
You mustn't go. — mátt + ekki + fara.
Same principle as the perfect: the negation sits after the finite modal and before the infinitive, not after it.
❌ Ég hef séð ekki hana.
Incorrect — ekki belongs right after the auxiliary, before the supine.
✅ Ég hef ekki séð hana.
I haven't seen her. — hef + ekki + séð.
Key Takeaways
- Main clause, single verb: ekki follows the finite verb — hann kemur ekki (a light pronoun object may shift ahead of ekki).
- Subordinate clause: ekki can precede the finite verb in careful/formal style (… að hann ekki komi); colloquial speech keeps it after (… að hann kemur ekki).
- Compound verb: ekki goes between the auxiliary/modal and the non-finite verb — hefur *ekki komið, mátt **ekki fara — the same spot as English "have *not seen."
- ekki never sits clause-final after the participle: hefur ekki komið, not hefur komið ekki.
- All sentence adverbs (aldrei, oft, líklega) follow the same placement logic as ekki.
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- Saying No and Not: nei and ekkiA1 — The A1 survival kit for negation — nei 'no', ekki 'not' placed after the verb (Ég veit ekki, Hann er ekki heima), no 'do'-support, and how to give a polite negative answer with nei, takk.
- Negation: ekki and Its PlacementA1 — The core negator ekki 'not' and where it sits — after the finite verb in a main clause, after a pronoun object but before a full-noun object — making ekki the diagnostic of Icelandic clause architecture, plus a first look at enginn, aldrei, and ekkert.
- Negative Words: enginn, ekkert, aldrei, hvergiB1 — Icelandic's negative quantifiers and adverbs — enginn 'no one/no', ekkert 'nothing', aldrei 'never', hvergi 'nowhere', engan veginn 'by no means' — and the rule that standard Icelandic avoids double negation, plus the enginn ↔ ekki neinn alternation.
- Subordinate Clause Word OrderB1 — How word order changes inside subordinate clauses — V2 is suspended, the subject stays next to the subordinator, and sentence adverbs/ekki precede the finite verb in the conservative standard (... að hann ekki kemur) — plus the marked 'embedded V2' option after reporting verbs.
- V2: The Verb-Second RuleA2 — The foundational rule of Icelandic main clauses — the finite verb is always the SECOND constituent, so fronting anything other than the subject forces verb-subject inversion (Í dag fer ég, Þetta veit ég ekki), unlike English which keeps the subject first.
- Negation with Modals and ScopeB2 — How ekki interacts with modal verbs, where the negation reverses the meaning depending on which modal it attaches to. The crucial split: þú mátt ekki fara 'you must not go' (PROHIBITION) versus þú þarft ekki að fara 'you don't have to go' (NO OBLIGATION) — English 'must not' and 'don't have to' map onto DIFFERENT Icelandic modals, so negating 'must' means SWITCHING the modal. ekki normally follows the finite modal (má ekki, þarf ekki) and scopes over the infinitive/supine.