Ova ulica je opasna.

Ova means this.

Serbian demonstratives change form to match the noun’s gender, number, and case.

Here, ulica is:

• feminine
• singular
• nominative

So the correct form is ova.

Compare:

• ovaj grad = this city (masculine)
• ova ulica = this street (feminine)
• ovo selo = this village (neuter)

Because ulica is a feminine noun in its basic dictionary form, which is the nominative singular.

A very large number of Serbian feminine nouns end in -a, for example:

• kuća = house
• škola = school
• voda = water

So ulica follows a very common pattern.

Because adjectives in Serbian must agree with the noun they describe.

Since ulica is feminine singular, the adjective must also be feminine singular:

• masculine: opasan
• feminine: opasna
• neuter: opasno

So:

• opasan grad = dangerous city
• opasna ulica = dangerous street
• opasno mesto = dangerous place

In this sentence, opasna is a predicate adjective after je, but it still agrees with ulica.

Je is the 3rd person singular present tense of the verb biti = to be.

So:

• ja sam = I am
• ti si = you are
• on/ona/ono je = he/she/it is

In Ova ulica je opasna, je means is.

In standard Serbian, in a normal present-tense sentence like this one, je is usually not omitted.

So you normally say:

• Ova ulica je opasna.

Not:

• Ova ulica opasna.

In some very informal styles, poetry, headlines, or regional speech, you may sometimes see omission, but for learners, it is best to keep je.

Because Serbian does not have articles like English the and a/an.

The noun ulica can mean:

• a street
• the street

The exact meaning depends on context.

If you want to make it more specific, Serbian often uses:

• a demonstrative: ova ulica = this street
• word order or context
• sometimes other expressions

So the lack of an article is completely normal.

Not as fixed as in English.

Ova ulica je opasna is the most neutral, straightforward order.

But Serbian can move words around for emphasis. For example:

• Opasna je ova ulica. = This street is dangerous / It’s this street that is dangerous.
• Ova je ulica opasna. = possible, with a different emphasis

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

For learners, the safest default is:

• Subject + je + adjective
• Ova ulica je opasna.

It is in the nominative case.

That is because ulica is the subject of the sentence:

• Ova ulica = the thing being talked about

The adjective opasna also appears in the matching form because it agrees with the subject.

So this is a simple nominative sentence:

• Ova ulica = nominative feminine singular
• opasna = feminine singular form agreeing with it

A simple learner-friendly pronunciation is:

• Ova → OH-va
• ulica → OO-lee-tsa
• je → ye
• opasna → oh-PAHS-na or OH-pas-na depending on accent

Put together:

• OH-va OO-lee-tsa ye oh-PAHS-na

A few helpful notes:

• j in Serbian is pronounced like English y in yes
• c is pronounced like ts
• every letter is pronounced clearly

The most common way is:

• Ta ulica je opasna.

Here ta means that.

Very roughly:

• ova = this
• ta = that
• ona = that over there / that one farther away

In real usage, ta and ona depend a lot on context, but ta ulica je opasna is the basic answer for that street is dangerous.

You change je to nije:

• Ova ulica nije opasna. = This street is not dangerous.

So:

• je = is
• nije = is not

This is a very common pattern in Serbian.

Yes. It can mean dangerous, but also more generally risky, hazardous, or even formidable depending on context.

Examples:

• opasan pas = a dangerous dog
• opasna situacija = a dangerous situation
• opasan čovek = a dangerous man

In some informal speech, especially among younger speakers, opasan can even be used positively to mean something like serious, impressive, or intense, but the basic meaning is still dangerous.

Yes.

• Ulica je opasna. = The street is dangerous / A street is dangerous, depending on context.
• Ova ulica je opasna. = This street is dangerous.

Adding ova makes the noun specific and points to a particular street. Without it, the sentence is more general or depends more heavily on context.