CREATE TABLE "present_subjunctive" (
  "verbs" text,
  "yo" text,
  "t" text,
  "vos" text,
  "l_ella_usted" text,
  "nosotros_nosotras" text,
  "vosotros_vosotras" text,
  "ellos_ellas_ustedes" text
);

Question: What are all  the conjugated forms of the verb where the el/ ella/usted verb is piense?
SQL: SELECT "nosotros_nosotras" FROM "present_subjunctive" WHERE "l_ella_usted"='piense';

Question: What are all  the conjugated forms of the verb moler where the vosotros / vosotras is moláis for the yo tense?
SQL: SELECT "yo" FROM "present_subjunctive" WHERE "vosotros_vosotras"='moláis';

Question: how many verbs have the yo form as sienta?
SQL: SELECT COUNT("verbs") FROM "present_subjunctive" WHERE "yo"='sienta';

Question: What  us the conjucated form(s)  of  el/ella/ usted when the Vos (*) is muelas / molás?
SQL: SELECT "l_ella_usted" FROM "present_subjunctive" WHERE "vos"='muelas / molás';

Question: What are the forms of the conjucated vos(*) where él / ella / usted is muela
SQL: SELECT "vos" FROM "present_subjunctive" WHERE "l_ella_usted"='muela';