Toivottavasti kaikki sujuu hyvin huomenna.

Toivottavasti means hopefully or I hope in the sense of commenting on the whole sentence.

It is an adverb, not a verb, so it does not change for person. It expresses the speaker’s attitude toward the statement that follows:

• Toivottavasti kaikki sujuu hyvin huomenna. = Hopefully everything goes well tomorrow.

In Finnish, this is a very common and natural way to express hope.

There could be, but Finnish often uses toivottavasti instead of a full clause with I hope.

Compare:

• Toivottavasti kaikki sujuu hyvin huomenna. = Hopefully everything goes well tomorrow.
• Toivon, että kaikki sujuu hyvin huomenna. = I hope that everything goes well tomorrow.

Both are correct.
The version with toivottavasti is slightly more compact and very common in everyday Finnish.

Here kaikki means everything.

Because it refers to things in a general, whole-situation sense, Finnish uses a singular verb:

• kaikki sujuu = everything goes / works out

This is very common with expressions about how things are going:

• Kaikki menee hyvin.
• Kaikki sujuu hyvin.

When kaikki means everyone, Finnish often uses a plural verb instead:

• Kaikki ovat täällä. = Everyone is here.

So in this sentence, kaikki is best understood as everything, not everyone.

The verb sujua means something like:

• to go well
• to proceed
• to run smoothly
• to work out

It is often used when talking about events, plans, work, arrangements, or situations.

So kaikki sujuu hyvin is not just everything goes literally, but more naturally:

• everything goes well
• everything runs smoothly
• everything works out well

Sujuu is the 3rd person singular present tense form of sujua.

Dictionary form:

• sujua = to go smoothly / to work out

Sentence form:

• sujuu = goes smoothly / works out

The subject is kaikki, so Finnish uses the 3rd person singular form:

• kaikki sujuu

You do not need a separate subject pronoun like it. Finnish normally just uses the noun or pronoun subject itself.

Because Finnish usually uses the present tense to talk about the future when the time is clear from context.

Here the future meaning comes from huomenna = tomorrow.

So:

• kaikki sujuu hyvin huomenna

literally uses present tense, but it naturally means:

• everything will go well tomorrow

Finnish does not have a separate future tense like English will in most normal situations.

Because hyvin is an adverb meaning well, while hyvä is an adjective meaning good.

In this sentence, the word is describing the verb sujuu:

• sujuu hyvin = goes well

Since it modifies a verb, Finnish uses the adverb:

• hyvin

Compare:

• hyvä päivä = a good day
• päivä sujuu hyvin = the day goes well

So hyvin is the correct form here.

Yes—at learner level, you can treat huomenna simply as the adverb tomorrow.

It is a time word, and no preposition is needed:

• huomenna = tomorrow

So Finnish says:

• huomenna not
• on tomorrow
• at tomorrow

Historically, the form is related to an old case form, but for practical learning it is best to think of it as a fixed time adverb.

Yes, the word order could be different. Finnish word order is fairly flexible.

This version is natural because it goes roughly like this:

• Toivottavasti = sentence comment first
• kaikki = subject
• sujuu = verb
• hyvin = manner
• huomenna = time

You could also say:

• Toivottavasti huomenna kaikki sujuu hyvin.
• Huomenna kaikki sujuu toivottavasti hyvin.

These are still understandable, but the emphasis changes a little. The original sentence is a very normal, neutral choice.

No. After toivottavasti, you normally do not use että.

Correct:

• Toivottavasti kaikki sujuu hyvin huomenna.

Not the usual pattern:

• Toivottavasti että kaikki sujuu hyvin huomenna.

But if you use the verb toivoa instead, then että is normal:

• Toivon, että kaikki sujuu hyvin huomenna.

So the difference is:

• toivottavasti + sentence
• toivon, että + sentence

It is neutral and very natural. You could use it in speech, messages, or writing.

It sounds polite and normal in many situations, for example when someone has:

• an exam
• a meeting
• a trip
• an appointment
• an important day

So it is a useful everyday sentence pattern to remember.