Questions & Answers about 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.