How to form the subjunctive mood. The subjunctive mood is used a great deal in the Spanish language. For example, the subjunctive can help a person to talk about something wished for, something about which a person feels some special emotional reaction, or something that is not real in some way.
-ar verbs: take off the “-ar” ending to the infinitive
Add “e, es, e, emos, éis, en”
-er/-ir verbs: take off the “-er/-ir” ending of the infinitive
Add “a, as, a, amos, áis, an”
Information cited from:Conner, John Breaking the Spanish Barrier 2006