Most adverbs describe how an action happens. A sentence adverb does something different: it steps outside the action and comments on the whole clause — how likely it is, how the speaker feels about it, whether it is obvious. Ehkä hän tulee ("Maybe he'll come") does not describe the coming; it flags the speaker's uncertainty about the entire statement. These are the words that make Finnish sound like a real person is talking rather than reciting facts, and they sit at the heart of everyday conversation.
The certainty scale
The most useful sentence adverbs line up along a scale of how sure the speaker is:
| Finnish | English | Stance |
|---|---|---|
| tietysti / tietenkin | of course | certain, obvious |
| varmasti | certainly, for sure | certain |
| varmaan | probably, I assume | likely |
| kai | I suppose, presumably | leaning yes |
| ehkä | maybe, perhaps | genuinely unsure |
Watch the front vowel in ehkä — never ehka. Here is the same clause climbing the scale:
Ehkä hän tulee juhliin.
Maybe he'll come to the party.
Hän tulee varmaan juhliin.
He'll probably come to the party.
Tietysti hän tulee juhliin.
Of course he'll come to the party.
Notice the placement: a sentence adverb typically stands clause-initially (Ehkä hän tulee) or right after the verb (Hän tulee varmaan). Both are natural; fronting draws a little more attention to the stance.
The big trap: varmaan is NOT varmasti
This is the mistake that trips up nearly every English speaker, because the two words look almost identical. They are near-opposites in strength:
- varmaan = probably, I assume — the speaker thinks it likely but is not certain
- varmasti = certainly, for sure — the speaker vouches for it
Hän tulee varmaan, mutta en ole kysynyt.
He's probably coming, but I haven't asked.
Hän tulee varmasti — hän lupasi.
He's definitely coming — he promised.
So "he's probably tired" is Hän on varmaan väsynyt (an assumption), while "he's definitely tired" is Hän on varmasti väsynyt (a certainty). Reach for varmasti only when you would stake something on it.
Olen varmaan oikeassa, mutta tarkistetaan.
I'm probably right, but let's check.
Olen varmasti oikeassa, laskin sen kahdesti.
I'm certainly right, I calculated it twice.
Feelings about the fact: toivottavasti, valitettavasti, onneksi
A second group comments not on likelihood but on how welcome the fact is:
- toivottavasti — hopefully (I hope it turns out this way)
- valitettavasti — unfortunately, regrettably
- onneksi — luckily, fortunately
Toivottavasti kaikki menee hyvin huomenna.
Hopefully everything goes well tomorrow.
Valitettavasti emme voi tulla häihin.
Unfortunately we can't come to the wedding.
Onneksi kukaan ei loukkaantunut kolarissa.
Luckily no one was hurt in the crash.
Crucially, these are followed by a plain indicative clause with no että ("that"): Toivottavasti hän tulee, not Toivottavasti että hän tulee. English lets you say "Hopefully that..."; Finnish does not insert a conjunction here.
Clitics for tone: -han / -hän and -pa / -pä
Sentence adverbs love to team up with the softening clitics -han/-hän and -pa/-pä, which add shades of "you know," "surely," or gentle emphasis. Ehkäpä ("perhaps, then"), kaipa ("I suppose so"), and tietenkin's conversational partner tietysti all take these:
Ehkäpä voisimme mennä elokuviin lauantaina.
Maybe we could go to the movies on Saturday.
Kyllähän sinä sen tiedät.
You surely know that, don't you.
Here kyllä, usually just "yes," works as an emphatic sentence adverb meaning "surely, indeed" — reinforcing the whole statement rather than answering a question. The clitics themselves are covered on the -han and -pa pages, and the wider world of discourse particles on the discourse overview.
Common Mistakes
1. Using varmaan to mean "certainly"
❌ Lupaan sen, tulen varmaan.
Contradictory — varmaan means 'probably', which undercuts a promise.
✅ Lupaan sen, tulen varmasti.
I promise, I'll definitely come.
For a firm commitment you need varmasti. Varmaan signals you are only assuming.
2. Inserting että after these adverbs
❌ Toivottavasti että hän voi paremmin pian.
Incorrect — no conjunction follows toivottavasti.
✅ Toivottavasti hän voi paremmin pian.
Hopefully he feels better soon.
Toivottavasti, valitettavasti, and tietysti are adverbs, not verbs, so they take a bare clause with no että.
3. Reaching for ehkä when you actually lean yes
❌ Ovi on lukossa, ehkä hän on jo lähtenyt.
Weak — you clearly infer he left, so ehkä undersells it.
✅ Ovi on lukossa, hän on kai jo lähtenyt.
The door is locked; he's presumably already left.
Ehkä is genuine 50/50 uncertainty. When the evidence points one way, kai or varmaan fits better.
4. Dropping the front-vowel dots
❌ Ehka menen kotiin aikaisin.
Incorrect — ehkä has a front vowel.
✅ Ehkä menen kotiin aikaisin.
Maybe I'll go home early.
Ehkä is written with ä. The missing dots make it a different (non-existent) word.
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Start learning Finnish→Related Topics
- Adverbs in FinnishA1 — A map of the Finnish adverb system — manner -sti, the three-way place set, time, degree, frequency — built on the idea that most adverbs are frozen case forms.
- Discourse Markers: An OverviewB1 — A map of the little Finnish words — no, niin, joo, siis, tota, niinku, kuitenkin — that organize conversation, sorted by function, with each marker deferred to its own page.
- -han/-hän: Shared Knowledge and SofteningB1 — The pragmatic clitic -han/-hän frames information as already shared and softens both statements and commands — an everyday particle with no single English word.
- -pa/-pä: Emphasis and InsistenceB1 — The emphatic clitic -pa/-pä marks lively assertion, resolve, and insistence — an audible morpheme that does the work English leaves to tone of voice.