Vysávám pokoj.

Vysávám is the 1st person singular present tense form of the verb vysávat. The ending -ám tells you the subject is I, so Czech does not need a separate pronoun here.

Because vysávat is imperfective, vysávám pokoj can mean either I vacuum the room or I am vacuuming the room, depending on context.

Czech usually leaves out subject pronouns when they are not needed. In vysávám, the verb ending already shows that the subject is I.

So:

• Vysávám pokoj. = neutral, normal
• Já vysávám pokoj. = I am vacuuming the room, with extra emphasis or contrast

English needs I, but Czech often does not.

Czech does not have articles like a, an, or the. Whether something is definite or indefinite is understood from context.

So pokoj can mean:

• a room
• the room

In this sentence, the intended meaning is understood from the situation, not from an article.

Pokoj is the direct object, so it is in the accusative case. But for many masculine inanimate nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: pokoj
• accusative: pokoj

That is why the form does not change here.

You know mainly from the verb form and the meaning of the sentence.

In vysávám, the ending tells us the subject is I. That leaves pokoj as the thing being vacuumed, so it is the object.

Also, semantically, a room is something you vacuum, not something that vacuums.

It can mean both.

Czech does not have a separate tense like the English present continuous. The present tense of an imperfective verb can express:

• a habitual action: I vacuum the room
• an action happening right now: I am vacuuming the room

Context tells you which meaning is intended.

This is a question of aspect, which is very important in Czech.

• vysávat = imperfective: focuses on the process, repetition, or ongoing action
• vysát = perfective: focuses on the action as completed

So:

• Vysávám pokoj. = I am vacuuming / I vacuum the room
• Chci vysát pokoj. = I want to vacuum the room up / finish vacuuming the room

English does not mark this difference in the same way, so it often feels new to learners.

Yes. Czech word order is more flexible than English word order because endings carry a lot of the grammatical information.

The neutral order here is:

• Vysávám pokoj.

But you could also say:

• Pokoj vysávám.

That version puts more emphasis on pokoj, perhaps to contrast it with something else. For example, it might suggest It’s the room I’m vacuuming, not the kitchen.

So the original sentence is the most neutral and natural version.

A simple approximation is:

VY-saa-vaam PO-koy

A few useful points:

• Czech stress is usually on the first syllable of each word.
• á is a long vowel, so you hold it a bit longer.
• j is pronounced like English y in yes.

So pokoj sounds roughly like PO-koy.

The accent mark in Czech usually shows vowel length, not stress.

So a and á are different:

• a = short
• á = long

In vysávám, both á vowels are pronounced longer. This matters, because vowel length can change meaning in Czech.

Yes. Pokoj can also mean peace in other contexts.

But in Vysávám pokoj, it clearly means room, because that is what fits with the verb vysávat. You vacuum a room, not peace.

So this is a good example of how context tells you which meaning is intended.