Ja nikad neću kupiti ove cipele.

Yes, Serbian often drops subject pronouns because the verb already shows the person.

So:

• Neću kupiti ove cipele. = I will not buy these shoes.

The ja in Ja nikad neću kupiti ove cipele is optional and usually adds emphasis, contrast, or clarity.

For example:

• Neću kupiti ove cipele. = neutral
• Ja neću kupiti ove cipele. = I won’t buy these shoes (maybe someone else will)

So a learner should understand ja here as possible emphasis, not something that must always be present.

This sentence uses the future tense with:

• a future auxiliary: neću
• an infinitive: kupiti

The positive pattern is:

• ću kupiti = I will buy

The negative pattern is:

• neću kupiti = I will not buy

So:

• Ja ću kupiti = I will buy
• Ja neću kupiti = I will not buy

In this sentence:

• neću = I will not
• kupiti = buy

Because in standard Serbian, the negative form is written as one word:

• hoću = I want / I will
• neću = I will not

Similarly:

• hoćeš → nećeš
• hoće → neće
• hoćemo → nećemo
• hoćete → nećete
• hoće → neće

So neću is the correct standard spelling, not ne ću.

This is one of the most important differences from English.

Serbian normally uses negative concord, which means that when you use a negative word like nikad (never), the verb is also negative.

So Serbian says:

• Ja nikad neću kupiti ove cipele.

Literally, it looks like I never will-not buy these shoes, but that is completely normal in Serbian.

This also happens with other negative words:

• Niko ne dolazi. = Nobody is coming.
• Ništa ne vidim. = I don’t see anything.
• Nikad ne idem tamo. = I never go there.

So for English speakers, the key rule is: If Serbian has a negative word like nikad, niko, ništa, nigde, the verb is normally negative too.

Yes. Nikad and nikada both mean never.

• nikad = shorter, very common in speech
• nikada = slightly fuller form, also completely correct

So these are both possible:

• Ja nikad neću kupiti ove cipele.
• Ja nikada neću kupiti ove cipele.

They mean the same thing. The shorter nikad is especially common in everyday language.

This is about aspect, which is very important in Serbian.

• kupiti = perfective → to buy, as a completed act
• kupovati = imperfective → to be buying / to buy habitually / repeatedly

In this sentence, the speaker means a single completed purchase will never happen, so kupiti is the natural choice:

• Ja nikad neću kupiti ove cipele.
  = I will never buy these shoes.

If you used kupovati, it would sound more like repeated or habitual buying, for example:

• Nikad neću kupovati tako skupe cipele.
  = I will never buy shoes that expensive / I will never be buying such expensive shoes.

So kupiti is used because the focus is on one completed act of buying.

Ove cipele is in the accusative plural, because it is the direct object of kupiti.

You buy what?

• ove cipele

For many feminine plural nouns, the accusative plural looks the same as the nominative plural.

So:

• nominative plural: ove cipele = these shoes
• accusative plural: ove cipele = these shoes

That is why it looks unchanged.

Breakdown:

• ove = these
• cipele = shoes

Because after kupiti you need a direct object in the accusative, not the genitive.

So:

• kupiti ove cipele = to buy these shoes

Ovih cipela is genitive plural and would appear in different contexts, for example after some prepositions or with certain quantities/negations in other structures.

Here the sentence is simply:

• subject: ja
• adverb: nikad
• negative future verb: neću kupiti
• direct object: ove cipele

So ove cipele is the correct form.

Yes, absolutely. Serbian word order is more flexible than English.

These are all possible:

• Ja nikad neću kupiti ove cipele.
• Nikad neću kupiti ove cipele.
• Ove cipele nikad neću kupiti.
• Ja ove cipele nikad neću kupiti.

They all express basically the same core meaning, but the emphasis changes:

• Nikad neću kupiti ove cipele. → emphasis on never
• Ove cipele nikad neću kupiti. → emphasis on these shoes
• Ja ... → emphasis on I

The version with Nikad first is very natural.

Because ću is a clitic in Serbian, and clitics have special placement rules.

In the positive future tense, the auxiliary usually cannot just stand anywhere. You normally get:

• Ja ću kupiti ove cipele.

not:

• Ja nikad ću kupiti... ❌

When the future is negative, you use the full negative form neću, which behaves more like a normal stressed word:

• Ja nikad neću kupiti ove cipele.

So the correct sentence is:

• Ja nikad neću kupiti ove cipele.

not:

• Ja nikad ću kupiti ove cipele. ❌

Yes, that is possible.

• Ja nikad neću kupiti ove cipele.
• Ja ove cipele neću kupiti.

These do not mean exactly the same thing, though.

• Ja nikad neću kupiti ove cipele. = I will never buy these shoes.
• Ja ove cipele neću kupiti. = I will not buy these shoes.

The second version does not necessarily include the strong idea of never. It may simply mean a refusal in this situation.

So nikad adds a stronger sense of finality.

Yes. In Serbian, the future can often be formed in two ways:

1. ću + infinitive
   • Ja ću kupiti
2. verb stem + ću
   • Kupiću

So the positive sentence could be:

• Ja ću kupiti ove cipele.
• Kupiću ove cipele.

But in the negative, Serbian normally uses:

• neću kupiti

not a fused form like nekupiću.

So for this sentence, the correct negative form is:

• Ja nikad neću kupiti ove cipele.

The singular form does exist:

• cipela = shoe

But in real life, people often talk about shoes as a pair, so the plural cipele is very common, just like English shoes.

So:

• cipela = one shoe
• cipele = shoes

In this sentence, ove cipele means these shoes.

Neću is pronounced approximately like:

• NEH-choo

A few pronunciation notes:

• ć is a soft sound, somewhat like a very soft ch
• ću sounds roughly like choo, but softer than English ch
• stress is on the first syllable: NE-ću

So:

• neću ≈ NEH-choo

That is only an approximation, but it helps English speakers get close.