subjunctive mood clouds the facts,expresses opinion or emotion or indirect command

Wish

     Emotion

  Desire

           Doubt/denial

                            Impersonal expressions

     Negation

                    General commands

                                  Speculation about the future

-ar verbs change to er endings

-er/ir verbs change to ar endings

irregular in yo form

-car, que (saque, saques, saque, saquemos...)

-gar, gue  (ruege, ruees, ruege, ruegemos....)

-zar, ce  (comience,comiences,comience, comiencemos...)

Used when verb of main clause is in-

Present Indicative

present Perfect

Future Command

Irregular

Dar

de'

des

de'

demos

deis

den

Estar

este'

este's

este'

estemos

este'is

este'n

Haber

haya

hayas

haya

hayamos

haya'is

hayan

Ir

vaya

vayas

vaya

vayamos

vaya'is

vayan

Saber

sepa

sepas

sepa

sepamos

sepa'is

sepan

Ser

Sea

Seas

Sea

seamos

sea'is

sean