Questions & Answers about Moja sestra pije čaj svako veče.
Why is it moja sestra and not moj sestra?
Because moja has to agree with sestra in gender, number, and case.
- sestra is feminine singular
- so the possessive my must also be feminine singular: moja
Compare:
- moj brat = my brother
- moja sestra = my sister
- moje dete = my child
So moja is the correct form because sestra is a feminine noun.
What case is sestra in here?
Sestra is in the nominative case because it is the subject of the sentence — the person doing the action.
In Moja sestra pije čaj svako veče, the subject is moja sestra = my sister.
So:
- moja sestra = nominative, because she is the one who drinks
- čaj = object of the verb
- svako veče = time expression
How does pije work? What form of the verb is it?