1. Shaśati - He rules.
2. Shaśasi - You rule.
3. Shaśati - He/She/It rules.
4. Shaśmas - We rule.
5. Shaśtha - You (plural) rule.
6. Shaśanti - They rule.
It's important to note that the word "shashin" itself can also be used as a noun meaning "ruler" or "king".