Ne znam tačno gde je ulaz.

Ne znam means I don’t know.

• znam = I know
• ne = the negation particle not / don’t

In Serbian, ne is usually written as a separate word before the verb:

• znam = I know
• ne znam = I do not know

This is the normal way to negate most verbs.

Serbian often leaves out subject pronouns when they are already clear from the verb form.

Here, znam already means I know, so ja is not necessary.

You could say:

• Ja ne znam tačno gde je ulaz.

But that sounds more emphatic, as if stressing I:

• I don’t know exactly where the entrance is.

In neutral speech, Ne znam... is more natural.

Here tačno means exactly, precisely, or for sure.

So:

• Ne znam tačno... = I don’t know exactly...

It adds the idea that the speaker may know something generally, but not with precision.

In other contexts, tačno can also mean:

• correct
• accurate

For example:

• To je tačno. = That is correct / true.

Gde means where.

In this sentence, it introduces an indirect question:

• gde je ulaz = where the entrance is

Compare:

• Direct question: Gde je ulaz? = Where is the entrance?
• Indirect question: Ne znam gde je ulaz. = I don’t know where the entrance is.

So gde works both in direct and indirect questions.

Because je is the normal short form of is, and Serbian word order strongly favors:

• Gde je ulaz?

This is the standard and natural order.

A useful way to think of it:

• gde = where
• je = is
• ulaz = entrance

So the structure is very close to English where is the entrance.

Also, short forms like je tend to appear early in the clause, which is another reason gde je ulaz sounds right.

Je is the 3rd person singular present tense of biti (to be) in its short form.

Here it means is:

• ulaz je = the entrance is

But in normal Serbian word order, you say:

• gde je ulaz = where the entrance is

So in this sentence:

• je = is

Serbian does not have articles like a and the.

That means ulaz can mean:

• an entrance
• the entrance

The exact meaning depends on context.

In this sentence, English naturally uses the entrance because the speaker is probably talking about a specific entrance:

• Ne znam tačno gde je ulaz. = I don’t know exactly where the entrance is.

Ulaz is in the nominative singular here.

That is because it is the subject of the clause:

• gde je ulaz = where the entrance is

The verb je agrees with ulaz as the subject.

So this part is structurally:

• ulaz = subject
• je = verb

Yes, that is possible.

Both are understandable:

• Ne znam tačno gde je ulaz.
• Ne znam gde je tačno ulaz.

The first version is often the most neutral:

• Ne znam tačno gde je ulaz.

It sounds like exactly modifies the whole idea of knowing.

The second version places tačno closer to gde and can feel like the focus is more specifically on the location:

• I don’t know where exactly the entrance is.

The difference is small, and both are natural.

Yes. That means almost the same thing:

• Ne znam gde se nalazi ulaz. = I don’t know where the entrance is located.

This version is a bit more formal or descriptive.

Compare:

• gde je ulaz = where the entrance is
• gde se nalazi ulaz = where the entrance is located

In everyday conversation, gde je ulaz is simpler and more common.

Tačno is pronounced roughly like TAHCH-no.

A few sound notes:

• č sounds like ch in church
• a is a clear ah
• o is a clear short o

So:

• tač-no

The stress is typically on the first syllable: TAČ-no.

Gde is pronounced roughly like gdeh, with both consonants pronounced.

Important points:

• g is a hard g, like in go
• d is pronounced too
• e sounds like e in met, but cleaner and shorter

English speakers sometimes want to simplify the beginning, but in Serbian the cluster gd- is normal:

• gde

Most commonly, yes: ulaz means entrance, especially to a building, room, hall, stairwell, and so on.

Examples:

• Glavni ulaz = main entrance
• Ulaz u zgradu = entrance to the building

Depending on context, it can also mean entry in a broader sense, but in everyday use it usually refers to a physical entrance.

So in this sentence, a learner should understand ulaz primarily as entrance.