Questions & Answers about Dzieci śpią cicho w pokoju.
- Dzieci – noun (subject), nominative plural: children
- śpią – verb, 3rd person plural, present tense of spać: (they) sleep / are sleeping
- cicho – adverb: quietly
- w – preposition: in
- pokoju – noun, locative singular of pokój: room
Dziecko means a child (singular, neuter).
Dzieci means children (plural).
The sentence talks about more than one child, so the plural form Dzieci is required. Grammatically, dzieci is a non‑masculine personal plural noun, which affects verb agreement in some tenses (for example: Dzieci spały, not Dzieci spali in the past).
Śpią is:
- verb: spać (to sleep)
- person: 3rd person
- number: plural
- tense: present
- aspect: imperfective
So it means they sleep / they are sleeping. We know they refers to Dzieci, so: The children are sleeping or Children sleep (depending on context).