A barátnőm új nadrágot és meleg pulóvert keres a boltban.

In Hungarian, it is very normal to use the definite article before a possessed noun when it is the subject of the sentence.

So:

• barátnőm = my girlfriend / my female friend
• A barátnőm = my girlfriend / my female friend as the subject in a natural full sentence

This often feels strange to English speakers, because English usually does not say the my girlfriend. But in Hungarian, a/az can appear before possessive forms very naturally.

For example:

• A testvérem itt van. = My sibling is here.
• A barátnőm keres valamit. = My girlfriend is looking for something.

barátnőm consists of:

• barátnő = girlfriend / female friend
• -m = my

So:

• barátnőm = my girlfriend or my female friend

A useful thing to know is that Hungarian barátnő can mean either:

• a romantic girlfriend
• a female friend

The exact meaning depends on context.

Hungarian normally uses nadrág as a singular noun for one item of clothing, even though English uses the plural pants.

So:

• nadrág = pants / a pair of pants / trousers
• nadrágot = pants as the direct object

This is just a difference between the two languages. English treats this item as plural, but Hungarian usually treats it as singular.

If you want to talk about multiple pairs, then Hungarian can use the plural:

• nadrágok = pants / trousers in the sense of multiple pairs

They are the direct objects of the verb keres (looks for / is looking for), so they take the accusative ending.

• nadrág → nadrágot
• pulóver → pulóvert

The accusative in Hungarian often corresponds to the direct object in English.

In this sentence, your friend is looking for:

• új nadrágot = new pants
• meleg pulóvert = a warm sweater

So both nouns get accusative marking.

This is because Hungarian has two main verb conjugation patterns:

• indefinite conjugation
• definite conjugation

Here, the objects are indefinite:

• új nadrágot = new pants
• meleg pulóvert = a warm sweater

There is no definite article before them, and they are not specific known items. Because of that, Hungarian uses the indefinite form:

• keres = is looking for / looks for

If the object were definite, you would usually use the definite conjugation:

• A pulóvert keresi. = She is looking for the sweater.

So the sentence uses keres because the things being sought are indefinite.

Because the sentence is talking about nonspecific items, not particular known ones.

So:

• új nadrágot = new pants / some new pants
• meleg pulóvert = a warm sweater / some warm sweater

Hungarian often leaves out an article in this kind of object phrase, especially when the meaning is indefinite or non-specific.

Compare:

• Új nadrágot keres. = She is looking for new pants.
• A nadrágot keresi. = She is looking for the pants.

The first is indefinite, the second is definite.

In Hungarian, attributive adjectives usually do not take the case ending when they come directly before the noun.

So:

• új nadrágot
• meleg pulóvert

The accusative ending goes on the noun, not on the adjective.

This is different from some other languages where adjectives agree more visibly with the noun. In Hungarian, in this kind of phrase, the noun carries the case marking.

a boltban means in the store / in the shop.

It breaks down like this:

• bolt = store / shop
• -ban = in
• a boltban = in the store

The ending -ban / -ben is the inessive case, used for being inside something.

Examples:

• házban = in the house
• iskolában = in the school
• boltban = in the store

The form -ban appears here because of vowel harmony.

Because boltban refers to a definite place here: in the store.

So:

• a boltban = in the store
• egy boltban = in a store

If you said egy boltban, it would sound more like in a store / in some store. But a boltban suggests a more definite or identifiable place.

No, Hungarian word order is more flexible than English word order. This sentence has a neutral, natural order:

• A barátnőm új nadrágot és meleg pulóvert keres a boltban.

This is a straightforward way to say:

• subject: A barátnőm
• object: új nadrágot és meleg pulóvert
• verb: keres
• place: a boltban

But Hungarian can change word order to shift emphasis or focus.

For example, if you want to emphasize what she is looking for, you might move that part:

• Új nadrágot és meleg pulóvert keres a barátnőm a boltban.

That does not completely change the basic meaning, but it changes what feels highlighted.

Because Hungarian, like English, normally uses one and to connect the last two items in a simple list.

So:

• új nadrágot és meleg pulóvert = new pants and a warm sweater

This is completely normal coordination:

• nadrágot
  • pulóvert
• linked by és = and

If there were a longer list, Hungarian would still usually place és before the final item, much like English.