Az állatorvos holnap jön.

Az means the.

Hungarian has two forms of the definite article:

• a before a consonant sound
• az before a vowel sound

Because állatorvos begins with the vowel á, the correct article is az:

• az állatorvos = the veterinarian / the vet

Compare:

• a ház = the house
• az autó = the car

Állatorvos is a compound word:

• állat = animal
• orvos = doctor

So it literally means animal doctor, which is the Hungarian word for veterinarian / vet.

Hungarian makes a lot of compound nouns like this, and they are often written as one word.

Because Hungarian commonly writes compound nouns as a single word.

So instead of writing something like animal doctor as two words, Hungarian combines them:

• állat + orvos → állatorvos

This is very normal in Hungarian. English sometimes does something similar with words like firefighter or toothbrush.

Holnap means tomorrow.

It is a time word, and in this sentence it tells you when the vet is coming:

• Az állatorvos holnap jön.
• The vet is coming tomorrow.

In Hungarian, time expressions very often appear early in the sentence, but the exact position can change depending on emphasis.

This is very common in Hungarian.

Hungarian often uses the present tense when a future time is already clear from a word like holnap (tomorrow), majd (later), or another future time expression.

So:

• holnap jön literally looks like comes tomorrow
• but it naturally means is coming tomorrow or will come tomorrow

English also does something similar sometimes:

• She comes tomorrow is possible in some contexts,
• but English more often says She is coming tomorrow or She will come tomorrow.

Hungarian does not need a separate future marker here.

No. Jön is a conjugated form.

The dictionary form is:

• jönni = to come

In this sentence:

• jön = he/she/it comes or is coming

Because the subject is az állatorvos (the vet), the verb is in third person singular.

Because Hungarian often does not use a separate word meaning will when the future is obvious from context.

Here, holnap already shows that the action is in the future, so jön is enough.

Hungarian can form a more explicit future with fog + infinitive:

• Az állatorvos holnap jön.
• Az állatorvos holnap fog jönni.

Both can mean The vet will come tomorrow, but the simple present version is usually the more natural everyday choice here.

Yes. Hungarian word order is flexible, and changes in word order often change emphasis rather than the basic meaning.

For example:

• Az állatorvos holnap jön.
  Neutral: The vet is coming tomorrow.

• Holnap jön az állatorvos.
  This puts more focus on tomorrow: It’s tomorrow that the vet is coming / The vet is coming tomorrow.

• Az állatorvos jön holnap.
  Also possible, but less neutral in many contexts.

So the sentence can be rearranged, but the most natural version depends on what you want to emphasize.

Hungarian usually does not use a subject pronoun unless it is needed for emphasis or contrast.

Since the subject is already stated as az állatorvos, there is no need to add ő.

In fact, adding ő here would usually sound emphatic:

• Ő jön holnap. = He/She is the one coming tomorrow.

So the normal sentence simply uses the noun:

• Az állatorvos holnap jön.

A helpful rough guide:

• állatorvos ≈ AAL-la-tor-vosh
• holnap ≈ HOL-nop
• jön has a vowel ö that does not exist in standard English; it is similar to German ö or French eu

A few useful pronunciation points:

• Hungarian stress is normally on the first syllable of each word.
• á is a long vowel.
• j is pronounced like English y.
• s in Hungarian sounds like English sh.
  So the end of állatorvos sounds like -vosh, not -vos.

In this sentence, holnap functions as a time adverb meaning tomorrow.

That is why it can appear without any preposition or extra ending:

• holnap jön = comes tomorrow

English also uses tomorrow directly, without on:

• The vet is coming tomorrow
• not normally on tomorrow

So in that sense, Hungarian and English are similar here.

Yes.

• az állatorvos = the vet (a specific, identifiable vet)
• egy állatorvos = a vet (any one vet, not specifically identified)

So:

• Az állatorvos holnap jön. = The vet is coming tomorrow.
• Egy állatorvos holnap jön. = A vet is coming tomorrow.

The choice between az and egy changes whether the person is specific or not.

Yes.

Hungarian does not have a separate progressive form like English is coming. The form jön can cover several English possibilities depending on context:

• comes
• is coming
• sometimes even will come

In this sentence, because of holnap, the most natural English translation is:

• The vet is coming tomorrow or
• The vet will come tomorrow

So one Hungarian form can match different English forms.