Answer:
Row 1: CANTAN (they/you (plural) sing)
2: BAILO (I dance)
3. VENDO (I sell)
4: USAMOS (we use)
5: VIVEN (they/you (plural) live)
6: AYUDAS (you (informal) help)
7: ESCRIBO (I write)
8: BEBES (you (informal) drink)
9: CAMBIAN (they/you (plural) change)
Step-by-step explanation:
The unconjugated infinitives of these words are
CANTAR
BAILAR
VENDER
USAR
VIVIR
AYUDAR
ESCRIBIR
BEBER
CAMBIAR
Let me know if you have any questions about my answer! I hope this was helpful!