Adverbs ending in -o that are derived from adjectives (like хорошћ 'well' from хорћший 'good') are listed as separate entries in the Dictionary.
Many of them function as predicates, too; that is, they make complete sentences in and of themselves (like Хорошћ. 'It is good').
The Dictionary marks the two usages with the labels adv. and predicate, plus an illustration of the government pattern of the predicate word (usually Dative).
To express the future and past, add бџдет and бІло, respectively.
Adverb Predicate
Ћн хорошћ говорќт.
'He speaks well.'
Хорошћ, что ћн здљсь.
'It's a good thing he's here.'
Ћн скџчно говорќт.
'He's boring to listen to (talks boringly).'
Мнљ бІло скџчно.
'I was bored.'
Ћн говорќл хћлодно и спокћйно.
'He spoke coldly and calmly.'
Вђм не бџдет хћлодно?
'Won't you be cold?'