Завтра майстер прийде лагодити дах, якщо дощу не буде.

Yes. Завтра means tomorrow, and it is placed first to set the time right away.

Ukrainian word order is fairly flexible, so you could also say things like:

• Майстер завтра прийде лагодити дах, якщо дощу не буде.
• Якщо дощу не буде, завтра майстер прийде лагодити дах.

These versions are all grammatical, but the emphasis changes a little. Starting with Завтра makes tomorrow the first thing the listener notices.

Майстер literally means master, craftsman, or skilled worker, but in everyday Ukrainian it often means a repairman, technician, or workman, depending on context.

In this sentence, it means the person who will come do the repair work on the roof.

Прийде is the simple future of the perfective verb прийти (to come / to arrive).

Here the speaker means one completed arrival in the future, so perfective is natural:

• прийде = will come / will arrive

If you said буде приходити, that would come from an imperfective verb and would suggest repeated or ongoing coming, which does not fit this situation well.

So:

• майстер прийде = the repairman will come
• one future event, viewed as a whole

This is a very common pattern in Ukrainian:

• прийти + infinitive = to come to do something

So:

• прийде лагодити дах = will come to repair the roof

The infinitive лагодити tells you the purpose of coming.

Other similar examples:

• прийшов допомогти = came to help
• пішла купити хліб = went to buy bread

Лагодити means to repair / to fix / to mend and is a normal, natural choice here.

A few related points:

• лагодити is imperfective, so it names the activity itself: to repair
• полагодити is perfective, meaning to fix completely / to get repaired
• ремонтувати is also possible, but often sounds a bit more formal or technical depending on context

After прийде, Ukrainian very often uses an infinitive like лагодити simply to express purpose:

• прийде лагодити дах = will come to repair the roof

Дах is the direct object of лагодити, so it is in the accusative case.

But for an inanimate masculine singular noun, the accusative usually looks the same as the nominative. So:

• nominative: дах
• accusative: дах

That is why the form does not change.

Compare with another noun:

• стіл → accusative стіл
• будинок → accusative будинок

But animate masculine nouns behave differently:

• майстер (nominative)
• бачу майстра (accusative, animate)

This is one of the most important grammar points in the sentence.

After не буде in the sense of there will not be, Ukrainian often uses the genitive case for the thing that is absent.

So:

• дощ = nominative
• дощу = genitive

Therefore:

• дощу не буде = there will be no rain

This is very common with negated existence or absence:

• Води немає. = There is no water.
• Часу не буде. = There will be no time.
• Снігу не було. = There was no snow.

You may also hear не буде дощу, which is also natural. The sentence here uses a word order that puts дощу before не буде.

Не буде is:

• не = not
• буде = future tense, 3rd person singular of бути (to be)

Together, не буде means will not be.

In this sentence:

• якщо дощу не буде = if there is no rain / if it does not rain

Literally it is closer to if rain will not be, but natural English uses if there is no rain or if it doesn’t rain.

Ukrainian often expresses weather and existence with бути (to be), especially in phrases like:

• буде дощ = there will be rain / it will rain
• дощу не буде = there will be no rain / it won’t rain

English usually prefers it will rain / it won’t rain, but Ukrainian can naturally use the be structure.

So the Ukrainian sentence is perfectly normal and idiomatic.

Because якщо means if and introduces a subordinate clause.

The main clause is:

• Завтра майстер прийде лагодити дах

The subordinate clause is:

• якщо дощу не буде

Ukrainian normally separates such clauses with a comma.

Yes. You can say:

• Якщо дощу не буде, завтра майстер прийде лагодити дах.

This is completely natural. The meaning stays the same, but the sentence now foregrounds the condition first: if there is no rain.

Yes, both are grammatical and natural. The difference is mainly emphasis and rhythm.

• дощу не буде slightly highlights rain
• не буде дощу is also very common and may sound more neutral in some contexts

Ukrainian often allows this kind of rearrangement because case endings show the grammatical role.

Ukrainian has no articles like a or the.

So:

• майстер can mean a repairman or the repairman
• дах can mean a roof or the roof

Context tells you which meaning is intended. In this sentence, English naturally uses the because the speaker probably means a specific roof and a specific worker already known in the situation.

In real life, yes, a woman could do the job, but grammatically майстер is a masculine noun.

If you specifically want a feminine form, Ukrainian sometimes uses:

• майстриня

But in many practical contexts, speakers may still use майстер for the profession title. This depends on style, region, and how modern or gender-specific the wording is meant to be.

It sounds like normal, everyday standard Ukrainian.

Nothing in it is unusually formal or literary:

• Завтра = everyday
• майстер = everyday
• прийде лагодити дах = natural spoken/written usage
• якщо дощу не буде = standard and natural

So this is a very useful model sentence for ordinary conversation.