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In a sentence
Ktovie, či bude zajtra snežiť.
Who knows whether it will snow tomorrow.
Ktovie, kde teraz býva.
Who knows where he lives now.
Ktovie, prečo mešká vlak.
Who knows why the train is late.
Ktovie, kedy sa ešte uvidíme.
Who knows when we will see each other again.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.