Od ósmej do południa fachowiec naprawia przeciek, a od południa do wieczora malujemy ściany.

Because after od and do, Polish normally uses the genitive case.

So:

• ósma → ósmej
• południe → południa

That is why you get:

• od ósmej = from eight
• do południa = until noon

With clock times, Polish often uses the feminine ordinal form as if godzina were understood:

• ósma = the eighth hour / eight o’clock
• od ósmej = from eight o’clock

So the structure is:

• od + genitive
• do + genitive

This same pattern appears again in:

• od południa do wieczora

Because when Polish tells the hour in this kind of expression, it is based on the implied noun godzina (hour), which is feminine.

So even if godzina is not spoken, it is understood:

• (od) ósmej (godziny)

That is why the numeral appears in the feminine form.

Compare:

• o ósmej = at eight
• od ósmej = from eight

Both use the feminine form because of the implied godzina.

Here it means noon.

The noun południe can mean both:

• south
• noon / midday

In this sentence, the time expression od ósmej do południa clearly shows that it means until noon.

So:

• do południa = until noon
• od południa = from noon onward / starting at noon

Fachowiec means a skilled worker, specialist, tradesperson, or professional depending on context.

In this sentence, it most naturally means someone like a:

• plumber
• repairman
• contractor
• handyman with expertise

It suggests a person who knows the job professionally, not just some guy fixing something.

So fachowiec naprawia przeciek is something like:

• the repairman is fixing the leak
• a professional is repairing the leak

Przeciek means a leak.

It usually refers to water leaking somewhere, for example:

• a leaking pipe
• a roof leak
• water seeping through something

In this sentence:

• naprawia przeciek = is fixing the leak

A learner might also see related words like:

• przeciekać = to leak
• wyciek = a leak / spill / outflow in some contexts

But here przeciek is the straightforward noun leak.

Because naprawia is the imperfective form, and it fits an action viewed as ongoing or taking place over a stretch of time.

• naprawiać → imperfective
• naprawić → perfective

In the sentence:

• Od ósmej do południa fachowiec naprawia przeciek

the focus is on what is happening during that time period, not on the single completed result.

So naprawia is natural here:
From eight until noon, the repairman is fixing the leak.

If you used naprawi, that would point more toward completion:

• naprawi przeciek = he will fix / he’ll fix the leak or in some contexts he fixes it completely

In schedule-style descriptions covering blocks of time, Polish often prefers the imperfective.

Because in Polish, the verb ending already tells you the subject.

• malujemy = we paint / we are painting

The ending -my shows we, so the pronoun my is usually unnecessary.

Polish often drops subject pronouns unless they are needed for:

• emphasis
• contrast
• clarity

So:

• malujemy ściany = we’re painting the walls

If you said my malujemy ściany, it would sound more emphatic, like:

• we are painting the walls

Because malować takes a direct object, and the direct object here is in the accusative case.

Singular:

• ściana = wall
• ścianę = wall (accusative singular)

Plural:

• ściany = walls (accusative plural for this noun)

So:

• malujemy ściany = we paint / are painting the walls

Ścian is a different case form, usually genitive plural, and would not be the normal form here.

A is a coordinating conjunction. It often means something like:

• and
• while
• whereas
• and then
• sometimes a mild but

In this sentence, it links two contrasting or separate parts of the schedule:

• Od ósmej do południa fachowiec naprawia przeciek, a od południa do wieczora malujemy ściany.

It feels like:

• From eight to noon the repairman fixes the leak, and from noon to evening we paint the walls.

It is not exactly the same as i.

• i = plain and
• a = and / while / whereas, often marking a shift or contrast

Here a works well because the sentence moves from one activity/time block to another.

Because in Polish, when a joins two clauses, it is normally preceded by a comma.

So the punctuation in:

• ..., a ...

is standard Polish punctuation.

This is very common with conjunctions like:

• a
• ale
• więc
• że
  and others, depending on structure

So the comma here is not optional stylistic decoration; it is the normal written form.

Because Polish word order is flexible, and starting with the time phrase helps organize the sentence as a schedule.

The sentence is basically structured like this:

• Od ósmej do południa — time block 1
• fachowiec naprawia przeciek — activity 1
• a od południa do wieczora — time block 2
• malujemy ściany — activity 2

This makes the timeline very clear.

A more English-like order is possible, but the original sounds natural and well organized in Polish. Starting with the time phrase gives emphasis to when each activity happens.

Yes. Literally it is to evening, but in natural English it means until evening or until the evening.

Again, do takes the genitive:

• wieczór → wieczora

So:

• do wieczora = until evening

This is a very common Polish pattern for time limits:

• do rana = until morning
• do jutra = until tomorrow
• do końca tygodnia = until the end of the week

It could do either, depending on context, but it most naturally sounds like a description of a planned or current one-day schedule.

That is because:

• specific time blocks are given
• the imperfective verbs describe activities during those blocks

So it can mean something like:

• Today, from eight to noon the repairman is fixing the leak, and from noon to evening we’re painting the walls.

But Polish present tense can also describe repeated or habitual situations, so in the right context it could mean a routine arrangement.

Without extra context, most learners would probably understand it as a concrete plan or description of what is happening that day.

Yes.

Polish present tense often covers both:

• simple present
• present continuous

So malujemy ściany can mean:

• we paint the walls
• we are painting the walls

In this sentence, because it is tied to a specific time period:

• od południa do wieczora

the natural English translation is usually:

• we are painting the walls

That is because English often prefers the continuous form for an action happening during a defined period.

Not necessarily. Od ósmej means from eight o’clock onward, but it does not by itself strongly stress exactly at eight sharp.

If you wanted to emphasize precision, Polish could add something like:

• dokładnie od ósmej = starting exactly at eight
• już od ósmej = as early as eight

By itself, od ósmej do południa simply gives the time range: from eight until noon.