1 yo 2 tú 3 él 4 ella 5 él 6 ella 7 ellas 8-10 ellos 11-12 ustedes 13 nosotros 14 nosotras 15 nosotros 16 nosotras 17-18 nosotros 19-20 usted (If you have learned vosotros, small chance a few of them (11 and maybe 12) could be that instead although no one outside of Spain would actually use that form.)