Ali ulaz u zgradu je iza pekare.

Ali means but. It is a coordinating conjunction, so it links this sentence to a previous idea and shows contrast.

Putting ali at the beginning is normal, just like English But the entrance....

Ulaz means entrance. The phrase ulaz u zgradu is literally entrance into the building, but in natural English we usually say the entrance to the building.

Grammatically:

• ulaz = the noun entrance
• u zgradu = a prepositional phrase meaning into/to the building

So Serbian uses u + accusative here to show the goal or direction associated with the entrance.

Because after u in this kind of expression, Serbian uses the accusative case.

The dictionary form is:

• zgrada = building

Its accusative singular is:

• zgradu

So:

• u zgradu = into/to the building

This is different from:

• u zgradi = in the building
  which uses the locative for location.

Je is the 3rd person singular present form of biti (to be), meaning is.

So:

• ulaz u zgradu je iza pekare = the entrance to the building is behind the bakery

Serbian often uses je in sentences like this, just as English uses is.

Because iza normally takes the genitive case when it means behind.

The dictionary form is:

• pekara = bakery

Its genitive singular is:

• pekare

So:

• iza pekare = behind the bakery

For the meaning behind, yes, iza takes the genitive.

So both ideas like:

• behind the bakery
• to behind the bakery

still use genitive after iza.

That is why pekare appears here.

Because Serbian has no articles like English a/an/the.

Whether something is the entrance or an entrance is usually understood from context.

So ulaz u zgradu can mean:

• the entrance to the building
• an entrance to the building

In this sentence, context makes the entrance the natural translation.

Yes. Serbian word order is more flexible than English, although some orders sound more natural in certain contexts.

For example, these are possible:

• Ali ulaz u zgradu je iza pekare.
• Ulaz u zgradu je iza pekare.
• Iza pekare je ulaz u zgradu.

The version with iza pekare first puts more focus on the location.

One important detail: je is a clitic, so it usually appears in second position in the sentence or clause.

This is a very common Serbian question because u can go with different cases.

• u + accusative often indicates movement toward / into
• u + locative usually indicates location in

So:

• u zgradu = into/to the building
• u zgradi = in the building

In ulaz u zgradu, the idea is not location inside the building. It is the entrance that leads into it.

They are related, but not the same.

• ulaz = entrance, entryway, or the place where you enter
• vrata = door

So in this sentence, ulaz is better because it refers to the entrance area or access point, not just the physical door itself.

A rough pronunciation is:

Ali ulaz u zgradu je iza pekare
AH-lee OO-lahz oo ZGRA-doo yeh EE-zah peh-KAH-reh

A few helpful notes:

• j in Serbian sounds like English y
• zgr- in zgradu is a real consonant cluster, so it may feel difficult at first
• Serbian spelling is very phonetic, so words are usually pronounced much as they are written

Yes, it can matter for agreement and case endings.

Here the nouns are:

• ulaz = masculine
• zgrada = feminine
• pekara = feminine

In this sentence, gender matters mostly because it affects case forms:

• zgrada → zgradu in the accusative
• pekara → pekare in the genitive

If you later add adjectives, gender will matter there too.