Вечер прошёл быстро, потому что мы обсуждали фильм в чате.

The evening passed quickly because we discussed the movie in the chat.

Breakdown of Вечер прошёл быстро, потому что мы обсуждали фильм в чате.

• в: in
• потому что: because
• мы: we
• быстро: quickly

Questions & Answers about Вечер прошёл быстро, потому что мы обсуждали фильм в чате.

Why does Russian say Вечер прошёл (literally The evening passed) instead of Мы провели вечер (We spent the evening)?

Russian commonly describes time periods as if they pass on their own: Вечер прошёл быстро = The evening went by quickly.
You can also say Мы провели вечер… when you want to emphasize what we did (how we spent it), but Вечер прошёл… is a very natural, neutral way to talk about how the evening felt.

What’s the difference between прошёл and проходил here?

They are different aspects:

• прошёл (perfective) = the evening passed / went by as a completed whole (you’re looking back at the result).
• проходил (imperfective) = the evening was passing / was going by (more process-like, often used when setting a scene or contrasting with something else).
  In a simple “it went by quickly” statement, прошёл is the default.

Why is it прошёл (masculine)? How do I know the gender of вечер?