Пиво уже холодное.

In Russian, the verb to be is usually omitted in the present tense.

So Пиво уже холодное literally looks like Beer already cold, but it means The beer is already cold or Beer is already cold.

Russian does use forms of быть in other tenses, for example:

• Пиво было холодное = The beer was cold
• Пиво будет холодное = The beer will be cold

Because Russian adjectives must agree with the noun they describe in gender, number, and case.

Here, пиво is:

• neuter
• singular
• nominative

So the adjective must also be neuter singular nominative:

• masculine: холодный
• feminine: холодная
• neuter: холодное
• plural: холодные

That is why the sentence uses холодное.

Пиво is grammatically neuter because it ends in -о, and nouns ending in -о are very often neuter in Russian.

This is grammatical gender, not biological gender. Objects and substances also have grammatical gender in Russian, so beer being neuter is just a feature of the noun.

It is in the nominative case.

In this sentence, пиво is the subject, and the subject of a basic statement is normally in the nominative.

The adjective холодное also matches that nominative form.

Уже means already.

It shows that the state has been reached by now. In this sentence, it means the beer has become cold, or it is cold sooner than expected, or it is cold now when that matters.

So уже adds the idea of by this point or now already.

That is a very natural position for it.

Russian word order is more flexible than English word order, but Пиво уже холодное is a normal neutral way to say this. The adverb уже comes after the subject and before the predicate adjective.

Other orders are possible, but they can sound more marked or more conversational, for example:

• Уже пиво холодное = stronger emphasis on already
• Пиво холодное уже = more colloquial or contrastive, depending on context

For a beginner, Пиво уже холодное is the safest neutral pattern.

Russian does not have articles.

So пиво can mean:

• beer
• a beer
• the beer

Context tells you which one is meant.

In this sentence, depending on the situation, Пиво уже холодное could mean either The beer is already cold or Beer is already cold.

Because холодное is an adjective agreeing with the noun пиво.

You are describing what kind of beer it is right now: cold beer.

Холодно is usually used differently. It often means it is cold in an impersonal sense, for example:

• Здесь холодно = It is cold here
• Мне холодно = I am cold

With пиво, the normal form is холодное, because the adjective must match the noun.

The stress is:

• пИво
• ужЕ
• холОдное

So you can think of it as:

ПИ-во у-ЖЕ хо-ЛОД-но-е

Stress matters in Russian, so it is important to learn the stressed syllable together with each word.

Yes.

If you say Пиво холодное, it simply means The beer is cold.

Adding уже gives the extra idea of already. So the difference is:

• Пиво холодное = The beer is cold
• Пиво уже холодное = The beer is already cold

Yes, it is singular.

Russian пиво is a singular neuter noun. Like English beer, it can refer to the substance in general, but in a sentence like this it can also refer to a specific serving, drink, or glass, depending on context.

So the singular form here is completely normal.