Good lord, there's more to Spanish than just present tense!

Unfortunantly, I only know two more: the imperfect past tense, and the preterite. The imperfect past tense is used to describe things you used to do or did over an extended period of time ("I used to feel..."), and the preterite is used to say things you've done ("I felt").

El Pretérito:

AR Regular Verb Form Endings

-aste

-amos
-aron

Example: caminar (to walk)
caminé (I walked)
caminaste (you walked)
caminó (he walked)
caminamos (we walked)
caminaron (they walked)

ER and IR Regular Verb Form Endings

-iste
-ió
-imos
-ieron

Example: comer (to eat)
comí (I ate)
comiste (you ate)
comió (he ate)
comimos (we ate)
comieron (they ate)

As with many verb forms, there are some that don't fit the pattern. Take "leer" for instance...

leí
leíste
leyó
leímos
leyeron

This change takes place because three soft vowels cannot be together in Spanish words. These verb endings are also present in verbs like "creer" and other similar verbs.

Here are other verbs that don't fit pattern:

estar (to be feeling)
estuve
estuviste
estuvo
estuvimos
estuvieron

ser/ir (to be/to go)
fui
fuiste
fue
fuimos
fueron

venir (to come)
vine
viniste
vino
vinimos
vinieron

ver (to see)
vi
viste
vio
vimos
vieron

poner (to put)
puse
pusiste
puso
pusimos
pusieron

El Imperfecto:

The imperfect past tense is much easier to learn. And there's only three exceptions in the pattern.

AR Regular Verb Endings
-aba
-abas
-aba
-ábamos
-aban

Example: estar
estaba
estabas
estaba
estábamos
estaban

ER and IR Regular Verb Endings
-ía
-ías
-ía
-íamos
-ían

Example: leer
leía
leías
leía
leíamos
leían

And these are the ONLY three irregulars.

ir
iba
ibas
iba
íbamos
iban

ver
veía
veías
veía
veíamos
veían

ser
era
eras
era
éramos
eran

Hope you enjoyed that little lesson. Let me know if I've forgotten anything.