Pes má dlouhý ocas.

Czech does not have articles like English a/an and the.

So pes can mean a dog or the dog, and ocas can mean a tail or the tail, depending on context.

That means Pes má dlouhý ocas could be understood as:

• The dog has a long tail
• A dog has a long tail
• sometimes even The dog has the long tail, if the context supports it

Czech usually leaves that distinction to context instead of using a separate word.

Má is the 3rd person singular present tense form of the verb mít, which means to have.

So:

• já mám = I have
• ty máš = you have
• on/ona/ono má = he/she/it has

In this sentence, pes is singular, so Czech uses má: Pes má... = The dog has...

Also, the á is long, so it is pronounced longer than a short a.

Because adjectives in Czech must agree with the noun they describe in:

• gender
• number
• case

Here, dlouhý describes ocas.

Ocas is:

• masculine
• singular
• accusative here, because it is the direct object of má

For a masculine singular inanimate noun in the accusative, the adjective form is dlouhý.

Compare:

• dlouhý ocas = a long tail
• dlouhá kočka = a long female cat / long cat
• dlouhé auto = a long car

So the ending -ý is there because it matches ocas.

Because ocas is a masculine inanimate noun, and in Czech the accusative singular of masculine inanimate nouns is usually the same as the nominative singular.

So:

• nominative: ocas
• accusative: ocas

That is why there is no visible change here, even though ocas is the direct object.

The same thing happens with the adjective:

• nominative masculine inanimate singular: dlouhý
• accusative masculine inanimate singular: dlouhý

So dlouhý ocas looks the same in nominative and accusative.

This can feel strange at first if you are expecting the object to always change form.

Both nouns are masculine, but they belong to different masculine subtypes:

• pes = masculine animate
• ocas = masculine inanimate

This matters because Czech treats animate and inanimate masculine nouns differently, especially in the accusative.

For example:

• Vidím psa = I see the dog
  Here pes changes to psa because it is masculine animate.
• Vidím ocas = I see the tail
  Here ocas stays ocas because it is masculine inanimate.

So in your sentence:

• pes is the subject, so it is in the nominative
• ocas is the object, so it is in the accusative, but it happens to look unchanged

Not completely. Pes is a very common noun, but it has an irregular-looking stem in some forms.

You will often see:

• nominative singular: pes
• genitive singular: psa
• dative singular: psovi / psu
• nominative plural: psi

So the stem often becomes ps- instead of pes-.

That means a learner may wonder why pes turns into forms like psa or psi. This is normal and worth memorizing early, because pes is very common.

Because this sentence uses to have, not to be.

The structure is:

subject + has + adjective + noun

So:

• Pes má dlouhý ocas = The dog has a long tail

Here dlouhý describes ocas, not pes.

If you wanted to say The tail is long, then you would use to be:

• Ocas je dlouhý

So:

• Pes má dlouhý ocas = The dog has a long tail
• Ocas je dlouhý = The tail is long

That is an important difference.

No, Czech word order is fairly flexible, but Pes má dlouhý ocas is the most neutral, straightforward order.

This is basically:

• subject: Pes
• verb: má
• object: dlouhý ocas

Other orders are possible, but they usually change the emphasis rather than the core meaning.

For example:

• Dlouhý ocas má pes = It is the dog that has a long tail / A dog has a long tail
• Ocas má pes dlouhý = possible in special contexts, but less neutral

For a beginner, Pes má dlouhý ocas is the best standard pattern to learn.

A simple learner-friendly pronunciation guide is:

pess maa DLOU-hee O-tsas

A few key points:

• pes sounds like pess
• má has a long a
• ou in dlouhý is a real diphthong
• h in Czech is pronounced, unlike in many English words
• c in ocas is pronounced ts
• stress in Czech usually falls on the first syllable of each word:
  PES má DLOU-hý O-cas

A more precise pronunciation is approximately:

• pes = /pɛs/
• má = /maː/
• dlouhý = /ˈdlouɦiː/
• ocas = /ˈot͡sas/

Yes, in the right context, Czech can omit the subject if it is clear.

Because má already shows 3rd person singular, Má dlouhý ocas can mean:

• He has a long tail
• She has a long tail
• It has a long tail
• The dog has a long tail

But without context, it is less clear than Pes má dlouhý ocas.

Czech often drops subject pronouns, but nouns are kept when you need to identify who or what you are talking about.