20. Do the DISHES! (Irregular subjunctive forms)

Dar is only irregular in the accents. Treat it like a regular -ar verb, but notice the accents:

yo dé, tú des, Ud./él/ella dé; nosotros demos, vosotros deis, Uds./ellos/ellas den

Ir has an irregular subjunctive stem, vay-, but you add the regular -er/-ir subjunctive endings:

Ser (to be) has the stem se- plus -er/ir subjunctive endings:

yo sea, tú seas, Ud./él/ella sea; nosotros seamos, vosotros seáis, Uds./ellos/ellas sean

You've seen indicative forms of haber in two word verb forms such as "yo he comido" (I have eaten).

Haber uses the stem hay- and the usual -er/-ir subjunctive endings: yo haya, tú hayas, Ud./él/ella haya; nosotros hayamos, vosotros hayáis, Uds./ellos/ellas hayan

So the subjunctive of "he comido" is "haya comido"

Es bueno que (yo) haya comido.

"It's good that I have eaten."

And the subjunctive of "hay" is "haya":

Me alegra que haya pizza en la fiesta.

Estar: Except for the yo form (esté), the subjunctive of estar looks like the indicative, but with the subjunctive vowel switch. esté, estés, esté, estemos, estéis, estén

Saber (to know) has the irregular stem sep- with the usual -er/ir subjunctive endings: que yo sepa, tú sepas, Ud. /él/ella sepa, etc.