- Ak…, (tak)… – If…, (then)…
- Ak je dnes sobota, tak zajtra bude nedeľa. – If today is Saturday, then tomorrow will be Sunday.
- Ak bol predvčerom štvrtok, včera bol piatok. – If the day before yesterday was a Thursday, yesterday was a Friday.
- Kedy…? – When…? (in questions)
- Kedy bude medzinárodný filmový festival? – When will the international film festival be?
- Keď…, … – When…, … (to introduce a clause)
- Keď som bol mladý, bol som pekný, ale nebol som vôbec inteligentný. – When I was young, I was good-looking, but I was not intelligent at all.