Stem-changing verbs change the last vowel of the stem under certain conditions.
In stem-changing verbs of Class I (-ar or -er verbs), the e or o of the stem changes to ie or ue, respectively, in all the forms, except nosotros and vosotros, of both the present indicative and the present subjunctive.
Present Indicative:
Present Subjunctive:
What would the present subjunctive of (1) pensar (2) entender be?
What would the present indicative of (1) contar and (2) volver be?
Other Verbs of Class I:
A. Write the verb in the present indicative in the subject indicated:
B. Write the verbs in the present subjunctive in the subject indicated:
A. Translate into English:
1. se acuestan _________________________
2. me acuerdo _________________________
3. ella vuelve _________________________
4. Ud. caliente _________________________
5. mostremos _________________________
6. perdéis _________________________
7. que Uds. revuelvan _________________________
8. enciendas _________________________
9. él aprobó _________________________
10. me sentaba _________________________
11. costó _________________________
12. nevará _________________________
13. confieso _________________________
14. ellos devuelven _________________________
15. cierre Ud. _________________________
B. Translate into Spanish:
1. you (pl., fam.) lost _________________________
2. I hope that they understand _________________________
3. it’s possible that we will meet _________________________
4. do you (s., fam.) close? _________________________
5. you (s., fam.) do not understand _________________________
6. they moved _________________________
7. I was moving _________________________
8. they may show _________________________
9. you (s., fam.) move _________________________
10. we warmed _________________________
11. I am lighting _________________________
12. they do not lose _________________________
13. I may bite _________________________
14. I hope that you (s., fam.) will stir _________________________
15. it costs _________________________
