Posádka pádluje přes peřej.

Because posádka is grammatically singular. It is a collective noun meaning crew.

In Czech, the verb agrees with the grammatical form of the subject, not with the real number of people involved. So:

• Posádka pádluje. = The crew is paddling.
• but Členové posádky pádlují. = The crew members are paddling.

So even though a crew contains multiple people, posádka itself is one singular noun.

Pádluje is the 3rd person singular present tense of pádlovat (to paddle).

So:

• já pádluju / pádluji = I paddle / am paddling
• ty pádluješ = you paddle
• on/ona/ono pádluje = he/she/it paddles
• posádka pádluje = the crew paddles / is paddling

Because Czech present tense often covers both English simple present and present progressive, pádluje can mean either:

• paddles
• is paddling

The exact English translation depends on context.

Not quite.

• pádlovat = to paddle using a paddle (pádlo)
• veslovat = to row using oars (vesla)

So if someone is in a canoe or kayak and using paddles, pádlovat is the right verb. If they are in a rowboat using oars, you would normally use veslovat.

Posádka is in the nominative singular because it is the subject of the sentence.

It is also a feminine noun.

You can tell it is the subject because it is the thing doing the action:

• Posádka pádluje přes peřej.

So:

• posádka = nominative singular feminine
• role in the sentence = subject

The preposition přes normally takes the accusative case.

So in přes peřej, the noun peřej is in the accusative singular.

A useful thing to know here is that for this noun, the nominative singular and accusative singular look the same:

• nominative: peřej
• accusative: peřej

So the case has changed because of přes, but the form does not visibly change.

Here přes means something like across, over, or sometimes idiomatically through, depending on how you choose to phrase it in English.

Its core idea is movement from one side of something to the other, or movement crossing an obstacle/area.

So přes peřej literally suggests:

• across the rapid
• possibly through the rapids in more natural English, depending on context

Czech often uses přes where English may choose slightly different wording.

That is a very natural question.

In Czech, peřej can be singular and refer to one rapid or one stretch of rough water. English often prefers the plural rapids, even when talking about one section of rough water.

So:

• peřej = a rapid / a rapid stretch
• peřeje = rapids

Both languages package this idea a little differently, so a singular noun in Czech may be translated by a plural noun in natural English.

Because Czech does not use articles the way English does.

So posádka can mean:

• a crew
• the crew

and peřej can mean:

• a rapid
• the rapid

Context tells you which one is meant.

That is why a short Czech sentence can feel less specific than an English one until you know the situation.

Yes. Czech word order is relatively flexible because case endings and agreement help show what belongs where.

The neutral order here is:

• Posádka pádluje přes peřej.

But other orders are possible, for example:

• Přes peřej pádluje posádka.
• Posádka přes peřej pádluje.

These alternatives may change the focus or emphasis, but the basic meaning stays similar.

As a learner, it is best to treat subject + verb + other information as the most neutral pattern unless you have a reason to emphasize something else.

A few useful pronunciation points:

• Czech stress is usually on the first syllable of each word.
• á is a long vowel.
• In pádluje, the ending -je sounds roughly like -ye.
• ř is the special Czech sound that learners often find difficult.

Very roughly:

• Posádka → PO-saad-ka
• pádluje → PAAD-loo-ye
• přes → something like psh-es with Czech ř
• peřej → PE-rzhey very approximately

You do not need perfect ř right away; it is one of the hardest Czech sounds.

The dictionary forms are:

• posádka = crew
• pádlovat = to paddle
• přes = across / over
• peřej = rapid

Only pádluje is not in its dictionary form here, because it is a conjugated verb form. The others already appear in their basic dictionary shape, even though peřej is functioning as accusative in the sentence.