Я купаюсь в бассейне.

I

Breakdown of Я купаюсь в бассейне.

• в: in
• купаться: to swim
• бассейн: the pool

Questions & Answers about Я купаюсь в бассейне.

Why does the verb end in -ся?

The -ся suffix marks a reflexive verb. It originally means the action is performed on oneself. In купаться, it literally means “to bathe oneself,” but in everyday Russian you also use it to say “to take a swim” or “to bathe/swim.”

What case is бассейне, and why is it not accusative?

бассейне is in the prepositional case (singular). With в + prepositional you indicate location (“in the pool”). If you wanted to express motion “into the pool,” you would use в бассейн (accusative).

How is купаться conjugated in the present tense?

Here’s the full present-tense paradigm of купаться:
• я купаюсь
• ты купаешься
• он/она купается
• мы купаемся
• вы купаетесь
• они купаются

What’s the difference between купаться and плавать?

• купаться – to bathe oneself or to swim for fun/cleaning (focus on the reflexive “bathing”).
• плавать – to swim (focus on propelling yourself through water, as a sport or ability).
If you mean “I’m doing laps in the pool,” say я плаваю в бассейне. If you mean “I’m having a swim/taking a bath in the pool,” я купаюсь в бассейне is more natural.