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In a sentence
Dúfam, že to bude fungovať.
I hope this is going to work.
Inžinier nežije. Funguje to.
The engineer does not live. It works.
Fungovalo to.
It worked.
Nová tlačiareň funguje bez problémov.
The new printer works without problems.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.