Questions & Answers about Ako si sama u centru, gledaj mapu i pozovi me.
Sama means alone and it agrees with the person being spoken to.
Because the sentence is addressed to one female person, Serbian uses the feminine singular form:
- masculine: sam
- feminine: sama
So:
- Ako si sam u centru... = if you are alone in the center (to a man)
- Ako si sama u centru... = if you are alone in the center (to a woman)
This is something English does not show, because you are alone stays the same regardless of gender.
Serbian often leaves out subject pronouns when they are already clear from the verb form.
Here, the forms already show who is being addressed:
- si = you are
- gledaj = look
- pozovi = call
So ti is not necessary.
You could say Ako si ti sama u centru..., but that would add emphasis, something like if you yourself are alone downtown...