-ar -er -ir yo ud ns vs uds
Pres -a- o as a -mos áis an
-e- -i- es e éis/ís en
PP -a- é -ste ó -mos -steis aron
-i- í ieron
Irregulars listed: -i- e o
PI -àba- -ía- - -s - -mos -is -n
F -ar- -er- -ir- -ás -emos -éis -án
Cond -aría- -ería- -iría- - -s - -mos -is -n
S-Pres -e- -a- - -s - -mos _́-is -n
Imp -e- -a- × a/e/e
ad/ed/id
S-PI -àra- -ièra- - -s - -mos -is -n
(alt) -àse- -ièse- - -s - -mos -is -n
S-F -àre- -ière- - -s - -mos -is -n

Notes:

To use:

  1. Determine the root of the verb by removing the -ar/er/ir ending.
  2. Determine the suffix appropriate for tense and conjugation (columns 2 through 4).
  3. Determine the ending appropriate for tense and person (columns 5 through 10). If a cell is blank, use the cell above it. Null endings are denoted by a lone hyphen.
  4. If the ending starts with a hyphen, attach it to the root after the suffix. Otherwise, attach it instead of the suffix. If the _́ mark is present, put an accent on the underlined letter of the suffix.

Example: vosotros/as (existir)