Koupíme buď mop, nebo koště.

It means either ... or.

In this sentence:

• buď introduces the first option
• nebo introduces the second option

So Koupíme buď mop, nebo koště. means We’ll buy either a mop or a broom.

This pattern can link not only nouns, but also verbs or whole clauses.

Koupíme is the 1st person plural form of the verb koupit, so it means we will buy.

Breaking it down:

• koupit = to buy
• koupíme = we buy / we will buy

The subject we is built into the verb ending, so Czech does not need a separate word for we here.

Because koupit is a perfective verb.

In Czech, perfective verbs usually use their present-tense forms to express future completed actions. So:

• koupíme literally looks present
• but in normal usage it means we will buy

This is very common in Czech.

Compare:

• kupujeme = we are buying / we buy (imperfective, present)
• koupíme = we will buy (perfective, future meaning)

They are direct objects, so they are in the accusative case.

However, in Czech, some nouns have the same form in nominative and accusative singular, so you do not see any visible change here.

That is what happens with:

• mop → accusative singular is still mop
• koště → accusative singular is still koště

So the case is accusative, even though the words look unchanged.

• mop is masculine inanimate
• koště is neuter

This matters because adjectives, pronouns, and some numerals must agree with the noun.

For example:

• ten mop
• to koště

So even though both are objects here, they belong to different noun genders.

Because Czech normally uses a comma in the paired conjunction buď ..., nebo ....

So:

• Koupíme buď mop, nebo koště. ✅

If you drop buď and just use plain nebo, then in a simple phrase you usually would not write a comma:

• Koupíme mop nebo koště. ✅

So the comma here is connected to the full either ... or structure.

Yes, absolutely.

Koupíme mop nebo koště is natural and means basically the same thing: We’ll buy a mop or a broom.

Adding buď makes the alternative more explicit, like English either. It can sound a little more structured or emphatic.

So the difference is mostly:

• Koupíme mop nebo koště. = simple or
• Koupíme buď mop, nebo koště. = clearer either ... or

Yes, sometimes.

The most straightforward version is:

• Koupíme buď mop, nebo koště.

This places the choice directly on the two objects.

You may also see:

• Buď koupíme mop, nebo koště.

That is also possible, but it shifts the structure slightly so that either applies more to the whole clause. In practice, both are understandable, but the original sentence is the clearest if you want to emphasize the two things being chosen between.

Usually it suggests a choice between alternatives, so most people will understand it as one or the other.

In everyday use, buď ... nebo often carries the same feeling as English either ... or, which tends to suggest not both, especially in sentences like this one.

So here, the natural interpretation is:

• we will buy a mop
• or we will buy a broom
• probably not both

Still, exact logic always depends on context. If you needed to make only one completely explicit, you could add extra wording.