You've met sam, si, and je one at a time. Now the whole verb, singular and plural together — six small words that carry an enormous amount of Serbian.
Here's the complete present-tense conjugation of biti (to be):
ja sam — I am · ti si — you are · on/ona/ono je — he/she/it is
mi smo — we are · vi ste — you (plural/formal) are · oni/one/ona su — they are
The pattern to notice: plural forms almost always end differently from their singular counterpart, and once you've got all six, you can build a sentence about literally anyone — yourself, a friend, your dog, a whole classroom.
1. Ja Sofija.
2. Ti Jovan.
3. Ovo moj brat.
4. Moja sestra u Kanadi.
5. Moj pas gladan.
6. Mi pilići. 🎵 bonus: the song
7. Moj brat i ja u Srbiji sada.
8. Ti i tvoja sestra u Australiji.
9. Moja deca kod kuće.
SR (lat): Odgovori nisu osetljivi na velika/mala slova, i može latinicom ili ćirilicom.
СР (ћир): Одговори нису осетљиви на велика/мала слова, и може латиницом или ћирилицом.
EN: Answers are not case-sensitive, and can be typed in Latin or Cyrillic script.
Igra, pa upotreba
Ista gramatika, drugo raspoloženje — Verb Run: BITI.
JE or SU — singular vs. plural of the same verb — is next.
Next: JE ili SU? →