Questions & Answers about Han är fri nu.
- Han = subject pronoun, he
- är = present tense of vara, is/are/am
- fri = adjective, describing han
- nu = adverb, now
So the structure is:
subject + verb + adjective + adverb
A very natural basic Swedish sentence pattern.
Because är is the present tense of the verb vara (to be).
Some common forms of vara are:
- att vara = to be
- är = is/am/are
- var = was/were
- varit = been
It is an irregular verb, so you cannot predict är from the infinitive very easily. It is just a form you need to learn.