Moj otac je sada na poslu.

to be

Breakdown of Moj otac je sada na poslu.

• sada: now
• moj: my
• otac: father

Questions & Answers about Moj otac je sada na poslu.

Why is it moj otac and not moji otac?

Because otac is a singular masculine noun, and the possessive adjective moj has to agree with it in gender, number, and case.

• moj = masculine singular
• moja = feminine singular
• moje = neuter singular
• moji = masculine plural

So:

• moj otac = my father
• moji roditelji = my parents

In this sentence, otac is one male person, so moj is the correct form.

Why is there je in the sentence?

Je is the 3rd person singular present tense form of the verb biti (to be).

So here:

• Moj otac = my father
• je = is
• sada = now
• na poslu = at work

Serbian usually does use the verb to be in sentences like this, just as English does:

• On je kod kuće. = He is at home.
• Ona je u školi. = She is at school.

So je is necessary here.

Why is je in second position?