Moja sestra kaže da je umorna.

My sister says that she is tired.

Breakdown of Moja sestra kaže da je umorna.

• biti: to be
• moj: my
• sestra: sister
• umoran: tired

Questions & Answers about Moja sestra kaže da je umorna.

Why is it moja sestra and not moj sestra?

Because sestra is a feminine singular noun, and the possessive word moj has to agree with it.

So:

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

Since sestra is feminine, you say moja sestra.

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Why does umorna also end in -a?

For the same reason: it agrees with sestra.

The adjective umoran means tired, but its form changes depending on gender:

• umoran = masculine
• umorna = feminine
• umorno = neuter

So because the person being described is sestra, you use umorna.

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Why is there no word for the or a?

Serbian does not have articles like English the and a/an.

So sestra can mean:

• a sister
• the sister
• just sister

The exact meaning depends on context. In this sentence, moja sestra naturally means , and no article is needed.