Breakdown of Вечером мы с ровесником сидим в парке и обсуждаем планы на будущее.
Questions & Answers about Вечером мы с ровесником сидим в парке и обсуждаем планы на будущее.
Вечером is an adverbial form meaning “in the evening / in the evenings”.
Grammatically, it comes from the noun вечер (evening) in the instrumental case, but in practice you should treat вечером as a fixed time adverb, like:
- утром – in the morning
- днём – in/at the daytime
- ночью – at night
Russian very often expresses “at X time” without a preposition:
- Летом мы часто гуляем. – In summer we often go for walks.
- Зимой холодно. – In winter (it’s) cold.
So вечером here simply means “in the evening.” You don’t say в вечером — that would be incorrect.