A közös képviselő itt van.

A is the definite article, so it corresponds to English the.

Hungarian has two forms of the definite article:

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

So:

• a közös képviselő
• az ember

Here, közös starts with a consonant, so a is the correct form.

Literally:

• közös = common, shared
• képviselő = representative

Together, közös képviselő is also a common real-world expression in Hungarian, especially for the person who represents or manages a condominium/apartment building. So although the literal meaning is easy to see, in practice it can refer to a specific housing-management role.

That is true in many cases, but not in all of them.

Hungarian often omits van in the 3rd person singular present when the predicate is a noun or an adjective:

• Ő tanár. = He/She is a teacher.
• A ház nagy. = The house is big.

But when the sentence expresses location or existence, Hungarian normally uses van:

• Itt van. = He/She/It is here.
• A könyv az asztalon van. = The book is on the table.

So in A közös képviselő itt van., van is needed because the sentence says where someone is.

Itt means here.

It is an adverb, not a noun with a case ending. So you do not break it into a stem plus suffix; it is simply a basic word meaning here.

Compare:

• itt = here
• ott = there

Itt van is the normal, neutral order.

In Hungarian, adverbs and similar elements often appear before the verb in an unmarked sentence. So:

• A közös képviselő itt van. = neutral statement

If you say:

• A közös képviselő van itt.

that sounds more contrastive or focused, something like:

• It is the common representative who is here
• or The common representative is the one here

So the change is mainly about emphasis, not basic meaning.

Yes, very often.

Hungarian frequently omits subjects when they are clear from the context. So you can simply say:

• Itt van. = He/She/It is here.

In your sentence, the speaker includes A közös képviselő because they want to identify exactly who is here.

A few helpful points:

• ö is a rounded vowel, similar to German ö
• é is a long vowel, roughly like ay in say, but purer
• ő is a long version of ö
• Hungarian stress is normally on the first syllable of each word

So the stress is:

• KÖ-zös
• KÉP-vi-se-lő

Hungarian spelling is quite regular, so once you learn the sound values, pronunciation becomes much easier.

In Hungarian, accent marks are part of the spelling and usually show a real difference in pronunciation.

For example:

• é is not the same as e
• ő is not the same as ö

These marks are important and should not be ignored. They can change pronunciation and sometimes meaning as well. Hungarian treats these as distinct vowels, not just decorative marks.

You would usually say:

• A közös képviselő nincs itt.

That means The common representative is not here.

Notice that Hungarian normally uses nincs here, not nem van.

You change van to the appropriate form:

• A közös képviselő itt volt. = The common representative was here.
• A közös képviselő itt lesz. = The common representative will be here.

So the rest of the sentence stays the same, and the verb changes for tense.