Taj stari telefon je spor, ali još radi.

Taj means that.

So taj stari telefon = that old phone.

In Serbian, taj is a demonstrative adjective, and it changes form to match the noun’s gender, number, and case. Since telefon is masculine singular nominative, the correct form is taj.

Stari has to agree with telefon.

• telefon is masculine
• singular
• nominative case here, because it is the subject

So the adjective takes the matching form:

• taj stari telefon = that old phone

If the noun were feminine or neuter, the adjective form would change:

• ta stara knjiga = that old book
• to staro selo = that old village

Yes. Telefon is in the nominative singular because it is the subject of the sentence.

The whole subject is:

• Taj stari telefon = That old phone

In dictionary form, the noun is also telefon, so here it appears in its basic form.

Je is the 3rd person singular present of the verb biti (to be).

So:

• telefon je spor = the phone is slow

In Serbian, this little form je is often unstressed and placed in the typical second-position area of the clause.

Because spor here is an adjective, not an adverb.

It describes the noun telefon, so it must agree with telefon:

• telefon je spor = the phone is slow

Compare:

• Telefon radi sporo = The phone works slowly

Here sporo is an adverb, because it describes how it works, not what the phone is like.

Yes. Ali means but, and it is the most common straightforward translation.

So:

• spor, ali još radi = slow, but it still works

It connects two contrasting ideas:

• the phone is slow
• despite that, it still works

Here još means still.

So:

• još radi = still works

Još can have a few meanings depending on context, such as more, another, or still, but in this sentence the meaning is clearly still.

Examples:

• Još čekam. = I’m still waiting.
• Hoću još kafe. = I want more coffee.

Because Serbian usually does not need a subject pronoun when the verb form already shows the person and number.

Radi means he/she/it works.

Since the subject taj stari telefon is already stated, adding on would usually be unnecessary:

• Taj stari telefon još radi. = natural
• Taj stari telefon on još radi. = not natural in normal usage

Serbian often drops pronouns unless they are needed for emphasis or contrast.

It comes from the verb raditi.

In this sentence, radi is:

• present tense
• 3rd person singular

So:

• ja radim = I work / I am working
• ti radiš = you work
• on/ona/ono radi = he/she/it works

Here it means works / is functioning, not necessarily is employed.

Because Serbian does not usually require an explicit subject pronoun the way English does.

English needs:

• it still works

Serbian can simply say:

• još radi

The subject is already understood from the earlier noun phrase:

• Taj stari telefon ... još radi.

Serbian has no articles like the or a/an.

Meaning that in Serbian:

• telefon can mean phone, a phone, or the phone
• context tells you which one is meant

In this sentence, taj already makes it specific:

• taj stari telefon = that old phone

So no article is needed.

Yes.

• Stari telefon je spor, ali još radi. = The old phone is slow, but it still works.

Adding taj makes it more specifically that old phone, often pointing to a particular one already known in the conversation or physically present.

So:

• stari telefon = the/an old phone depending on context
• taj stari telefon = that old phone

Because ali joins two clauses, and in Serbian it is normal to put a comma before it, just like English often does before but.

The two parts are:

• Taj stari telefon je spor
• ali još radi

So the comma helps mark the contrast clearly.

The given word order is the most natural neutral one:

• Taj stari telefon je spor, ali još radi.

But Serbian word order is more flexible than English, especially for emphasis.

For example, you might also hear:

• Taj telefon je još star, spor, ali radi.
• Još radi, ali je spor.

However, not every rearrangement sounds equally natural. The original sentence is the best standard version for a learner.

A rough guide:

• taj ≈ tahy
• stari ≈ STAH-ree
• telefon ≈ teh-leh-FOHN
• je ≈ yeh
• spor ≈ spore
• ali ≈ AH-lee
• još ≈ yosh
• radi ≈ RAH-dee

A key point:

• j in Serbian is pronounced like English y in yes

So:

• je sounds like yeh
• još starts with yo-

Yes, absolutely.

Spor can describe something physically slow, but it is also very natural for technology, systems, apps, computers, or phones:

• Telefon je spor. = The phone is slow.
• Internet je spor. = The internet is slow.
• Kompjuter je spor. = The computer is slow.

So the sentence sounds completely natural.