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In a sentence
Videl som ich usmievať sa.
I saw them smile.
Videla som ich usmievať sa.
I saw them smile.
Prečo sa stále usmievaš?
Why are you still smiling?
Tom sa málokedy usmieva.
Tom seldom smiles.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Example sentences from Tatoeba (CC BY 2.0 FR).
Full attribution on References.