Questions & Answers about Śpiewanie pod prysznicem jest jej hobby.
In Polish, when an action is used as the grammatical subject of the sentence, it is usually turned into a verbal noun (a kind of gerund), not left in the infinitive.
- śpiewać = “to sing” (infinitive, a verb form)
- śpiewanie = “singing” (verbal noun, acts like a noun)
Polish prefers a noun as the subject of jest:
- Śpiewanie pod prysznicem jest jej hobby.
= Singing in the shower is her hobby.
Using the infinitive here (Śpiewać pod prysznicem jest jej hobby) sounds wrong or at least very unnatural in standard Polish. So think of śpiewanie as the equivalent of English singing (as a noun), not to sing.