Subjunctive II. Practice verb formation Formation: The formation of the present subjunctive is based on the YO of the present indicative. Start with the YO (hablo, como vivo, tengo) and drop the O. You are now left with habl, com, viv, teng. For AR verbs add the following endings: e, es,e, emos,eis, en. For ER/IR verbs add these endings: a, as, a, amos, ais, an Single stem change verbs work the same in the subjunctive as they did before. Everything inside the "shoe" changes. Everything outside does not. Therefore, hablo, como vivo, tengo in the indicative become hable, coma, viva and tenga in the subjunctive. In the exercise that follows, provide the subjunctive forms for these verbs.