Most adverbs modify a single word — very big, quickly ran. Sentence adverbs do something larger: they comment on the whole clause, telling you the speaker's attitude toward the proposition. Kannski hann kemur — "maybe he's coming" — doesn't modify any one verb or adjective; it qualifies the entire idea "he's coming" as merely possible. This page gathers the everyday sentence adverbs — kannski "maybe", líklega / sennilega "probably", auðvitað "of course", greinilega "evidently", vonandi "hopefully" — plus two fixed phrases that do the same job, því miður "unfortunately" and sem betur fer "fortunately". The grammar that matters here is position: because Icelandic is verb-second (V2), fronting a sentence adverb throws the verb ahead of the subject. "Maybe he's coming" is kannski *kemur hann, not *kannski hann kemur. That inversion is the single thing English speakers get wrong, every time, so it is the spine of this page. (The smaller *pragmatic particles — nú, bara, sko, jú — that flavour speech without commenting on truth belong to pragmatics/particles-overview; placement of the negator ekki is its own topic under Negation.)
What a sentence adverb is
A sentence adverb is the speaker stepping outside the sentence to label it: probably true, of course true, unfortunately true, hopefully true. Compare a manner adverb, which stays inside the event — hann talar hratt "he speaks fast" describes the talking — with a sentence adverb — hann talar *greinilega ekki íslensku "he evidently doesn't speak Icelandic", where *greinilega judges the whole claim. You can usually test it in English by paraphrasing with "it is [X] that…": líklega kemur hún ≈ "it is probable that she'll come". If that paraphrase works, you have a sentence adverb, and the V2 rules below apply.
Hún talar greinilega ekki mikla íslensku enn þá.
She evidently doesn't speak much Icelandic yet. — greinilega comments on the whole clause, not on any single word.
Auðvitað máttu fá að gista, þú þarft ekki einu sinni að spyrja.
Of course you can stay over, you don't even need to ask. — auðvitað fronted; the verb máttu (mátt + þú) comes second.
Position 1: fronted, with inversion
The most natural place for a sentence adverb is the front of the clause, and fronting it triggers V2 inversion — the finite verb hops to second position, ahead of the subject. This is mechanical and exceptionless for these adverbs (with one honest caveat about kannski, below). Learn the pattern on líklega and sennilega "probably", which behave perfectly regularly:
Líklega kemur hann ekki fyrr en eftir kvöldmat.
He probably won't come until after dinner. — fronted líklega → verb kemur before subject hann.
Sennilega verður rigning um helgina.
It'll probably rain over the weekend. — fronted sennilega → verður first, then the subject (here the weather-það is dropped/implicit).
Vonandi gengur þér vel í prófinu á morgun.
Hopefully the exam goes well for you tomorrow. — fronted vonandi → gengur before the experiencer þér.
Notice vonandi: it means "hopefully" and is an adverb, full stop — it is not a verb and takes no subject or ending of its own. English "hopefully" is also an adverb, so this should feel right; the trap is treating vonandi as if it were the verb "I hope" (which would be ég vona). Vonandi gengur þér vel = "hopefully it goes well for you", a comment on the clause, with the real verb being gengur.
Position 2: mid-clause, no inversion
A sentence adverb can also sit inside the clause, typically right after the finite verb, and there it triggers no inversion — ordinary subject–verb order stands. This is the same flexibility you see with contrast markers: fronting inverts, burying does not. So the same thought comes in two shapes:
Hann kemur líklega seint, eins og venjulega.
He'll probably come late, as usual. — líklega sits after the verb; normal order hann kemur stands.
Það verður auðvitað dýrara á háannatíma.
It'll of course be more expensive in high season. — auðvitað mid-clause, after the verb; no inversion.
Veðrið verður greinilega ekki gott á morgun.
The weather evidently won't be good tomorrow. — greinilega in its mid-clause slot, before ekki.
The two positions are both correct; the difference is emphasis. Fronting foregrounds the speaker's stance ("Probably he won't come"), and pays for it with inversion. Mid-clause is the unmarked, neutral placement and keeps subject–verb order intact. The error is never the choice of position — it is fronting and then forgetting to invert.
kannski — "maybe", and an honest exception
Kannski "maybe, perhaps" is the most common sentence adverb of all, and it deserves its own section because it behaves almost like the others — and then, in one respect, doesn't. Fronted, it normally triggers V2 inversion like any sentence adverb: kannski kemur hann á morgun "maybe he'll come tomorrow", verb before subject.
Kannski kemur hann á morgun, ef veðrið lagast.
Maybe he'll come tomorrow, if the weather improves. — fronted kannski → kemur before hann (the regular V2 pattern).
Kannski ættum við bara að panta pizzu í kvöld.
Maybe we should just order pizza tonight. — kannski → ættum before við.
Here is the honest caveat. Kannski is the one sentence adverb that, in casual speech, often does not invert. You will frequently hear kannski hann kemur — adverb, then ordinary subject–verb order — especially in relaxed conversation. This is not the careful written norm, but it is real and widespread, and a learner should recognise it without imitating it in formal writing. The reason is historical: kannski is a frozen contraction of kann (að) ske "(it) may happen", and that clausal origin lets speakers treat what follows as its own little clause rather than as the inverted remainder. So: invert by default (kannski kemur hann); but don't be surprised to hear kannski hann kemur in speech. In writing and careful speech, prefer the inverted form.
Kannski hann komi seinna — maður veit aldrei með hann.
Maybe he'll come later — you never know with him. — the casual non-inverting pattern (kannski + subject); note also the subjunctive komi, which kannski can license.
That last example shows the other thing kannski can do: because it flags genuine uncertainty, it sometimes licenses the subjunctive in the following verb (komi rather than indicative kemur) — the mood of doubt and possibility. The subjunctive is optional here and tilts the sentence toward "he may or may not"; the indicative kannski kemur hann is perfectly normal too. (The full logic of the subjunctive of doubt is on verbs/subjunctive-overview.)
The fixed phrases: því miður and sem betur fer
Two very common sentence adverbials are fixed multi-word phrases, and they front and invert as a single block. Því miður "unfortunately" (literally "the worse for it") and its opposite sem betur fer "fortunately" (literally "as goes better") are learned whole — don't try to parse or alter them. Fronted, the whole phrase counts as the first element, so the verb comes next:
Því miður get ég ekki komið í afmælið þitt.
Unfortunately I can't come to your birthday. — því miður fronted as one block → get before ég.
Sem betur fer slasaðist enginn í árekstrinum.
Fortunately no one was hurt in the collision. — sem betur fer fronted → slasaðist before the subject enginn.
Ég komst því miður ekki á fundinn.
I unfortunately couldn't make the meeting. — því miður mid-clause this time, after the verb; no inversion.
The pair því miður / sem betur fer is worth memorising as a unit because it is everywhere in everyday Icelandic — answering invitations, breaking news good or bad. Treat each as one indivisible adverb of speaker-attitude.
English vs Icelandic
English sentence adverbs front freely and keep the subject first: "Maybe he's coming", "Probably it'll rain", "Of course you can". So the English instinct is to drop the adverb at the front and leave the clause untouched — which produces exactly the wrong Icelandic word order. The mental switch is: in Icelandic, a fronted sentence adverb fills the first slot, so the verb must come second, ahead of the subject — kannski kemur hann, líklega rignir, auðvitað máttu. The good news is that the meanings line up cleanly (no false friends here) and that vonandi = "hopefully", því miður = "unfortunately", sem betur fer = "fortunately" map one-to-one. The only genuinely Icelandic wrinkles are the V2 inversion and the kannski exception, which is why both get the most space.
Common Mistakes
❌ Kannski hann kemur á morgun. (as careful/written Icelandic)
Dispreferred in careful style — a fronted sentence adverb triggers V2 inversion: kannski kemur hann. (You will hear the uninverted version in casual speech, but don't write it.)
✅ Kannski kemur hann á morgun.
Maybe he'll come tomorrow.
The headline error. Fronting kannski (or any sentence adverb) puts the verb second — kemur hann, not hann kemur. The uninverted form survives only as casual speech.
❌ Líklega hún verður sein.
Wrong order — fronted líklega forces inversion: líklega verður hún sein.
✅ Líklega verður hún sein.
She'll probably be late.
Líklega and sennilega invert with no exception (unlike kannski, they have no casual non-inverting variant). Verb before subject.
❌ Ég vonandi að það gangi vel.
Wrong — vonandi is an adverb, not the verb 'hope'. Either use the adverb (vonandi gengur það vel) or the verb (ég vona að það gangi vel).
✅ Vonandi gengur það vel.
Hopefully it goes well.
Don't treat vonandi "hopefully" as a verb. It's a sentence adverb; the verb of the clause is something else (gengur). To say "I hope", use ég vona að + subjunctive.
❌ Því miður ég get ekki komið.
No inversion after the fronted phrase — því miður counts as the first element: því miður get ég ekki komið.
✅ Því miður get ég ekki komið.
Unfortunately I can't come.
The fixed phrase því miður fronts as one block and still triggers V2 — verb before subject.
❌ Sem betur fer enginn slasaðist.
No inversion — the whole phrase sem betur fer is the first element, so the verb comes next: sem betur fer slasaðist enginn.
✅ Sem betur fer slasaðist enginn.
Fortunately no one was hurt.
Multi-word adverbials count as a single first element; fronting sem betur fer inverts the verb just like a one-word adverb would.
Key Takeaways
- Sentence adverbs comment on the whole clause: kannski "maybe", líklega/sennilega "probably", auðvitað "of course", greinilega "evidently", vonandi "hopefully".
- Fronting one triggers V2 inversion — the verb jumps ahead of the subject: kannski kemur hann, líklega verður hún sein. This is the error English speakers make every time.
- Placed mid-clause (after the verb), they trigger no inversion: hann kemur líklega seint.
- kannski is the honest exception: it normally inverts (kannski kemur hann), but in casual speech it often does not (kannski hann kemur) — recognise this, but invert in careful style. It can also license the subjunctive (kannski komi hann).
- Vonandi is an adverb, not the verb "hope" — the clause's real verb sits elsewhere.
- The fixed phrases því miður "unfortunately" and sem betur fer "fortunately" are learned whole and front/invert as single blocks. </content>
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