Questions & Answers about Sy kies die swart merker.
Here, sy means she because it is the subject of the verb kies.
Yes, sy can also mean his, but then it is possessive and comes before a noun, for example sy merker = his marker.
So:
- Sy kies die swart merker. = She chooses the black marker.
- sy merker = his marker
The position in the sentence tells you which meaning is intended.