Pobočka je otevřená od osmi.

Pobočka usually means a branch, a branch office, or a local branch of a business or institution. Depending on context, it could be a bank branch, post office branch, store branch, and so on.

It is a feminine noun, which matters for agreement elsewhere in the sentence.

Je is the 3rd person singular form of být (to be), so it means is.

So the structure is:

• Pobočka = the branch
• je = is
• otevřená = open

In normal standard Czech, this verb is used just like English is here. You may sometimes see je omitted in signs, notes, or very compressed style, but the full sentence normally includes it.

Because otevřená has to agree with pobočka.

Pobočka is:

• feminine
• singular
• nominative

So the adjective/predicate adjective must also be feminine singular nominative:

• masculine: otevřený
• feminine: otevřená
• neuter: otevřené

That is why otevřená is the correct form here.

In this sentence, it means open: a current state.

Czech often uses forms like otevřený / otevřená / otevřené to describe a state, even though they are historically related to a participle. So here it is best understood as open, not opened.

Compare:

• Dveře jsou otevřené. = The door is open / The doors are open.
• Obchod je otevřený. = The shop is open.

Yes. That is also correct.

There is a small style difference:

• je otevřená sounds very normal and everyday
• je otevřena sounds a bit more formal, official, or written

So on a sign, website, or official notice, otevřena is common. In ordinary speech, otevřená is very natural.

Because od means from, and after od, Czech uses the genitive case.

The numeral osm changes to osmi in the genitive, so:

• osm = eight
• od osmi = from eight

So od osmi literally means from eight.

Because the meaning is different.

• od osmi = from eight onward
• v osm = at eight

So:

• Pobočka je otevřená od osmi. = The branch is open from eight.
• Pobočka otevírá v osm. = The branch opens at eight.

English speakers often mix these up, but Czech keeps this distinction clearly.

Because Czech often leaves it out when the meaning is obvious.

So all of these can work:

• od osmi
• od osmi hodin

Both mean the same thing here. The shorter version is very common, especially in everyday language and when talking about opening hours.

Usually, yes, if you are talking about a branch, shop, office, or similar place. By default, people will normally understand 8 in the morning, because that makes the most sense for opening hours.

If needed, Czech can make it explicit:

• od osmi ráno = from 8 a.m.
• od osmi večer = from 8 p.m.

But in most real-life situations, context is enough.

Yes. Czech word order is flexible, and changing it usually changes emphasis, not the basic meaning.

Neutral word order here is:

• Pobočka je otevřená od osmi.

You could also say:

• Od osmi je pobočka otevřená.

That puts more focus on from eight.

So the original sentence is a natural, neutral way to say it, but other orders are possible depending on what you want to stress.

Because Czech has no articles.

English needs to choose between a branch and the branch, but Czech does not mark that with a separate word. The listener understands it from context.

So Pobočka could correspond to:

• the branch
• a branch

depending on the situation. In this sentence, context usually makes it clear which one is meant.