Moja soba je manja nego soba moje sestre.

My room is smaller than my sister’s room.

Breakdown of Moja soba je manja nego soba moje sestre.

• biti: to be
• moj: my
• sestra: sister
• soba: room

Questions & Answers about Moja soba je manja nego soba moje sestre.

Why is it moja soba and not moj soba?

Because soba is a feminine singular noun, and the possessive pronoun moj must agree with it.

So:

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

Since soba is feminine, you say moja soba.

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Why is it manja and not manji or mala?

Manja is the feminine singular comparative form of mali (small).

The pattern is:

• mali = small
• manji = smaller

Then that comparative adjective has to agree with soba, which is feminine singular:

• masculine: manji
• feminine: manja
• neuter: manje

So:

• moja soba je manja = my room is smaller

A useful thing to remember is that the comparative of mali is not formed in a perfectly obvious way, so it is best learned as:

• mali → manji

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What does nego mean here?