Chapter 39: El Presente de Subjuntivo - Formación (Verbos Regulares -ER e -IR) - Present Subjunctive - Formation (Regular -ER and -IR Verbs)

¡Hola! After learning to form the Present Subjunctive for regular -AR verbs, we'll now tackle regular -ER and -IR verbs. You'll be pleased to know that regular -ER and -IR verbs share the exact same set of endings in the Present Subjunctive, and they also follow the "opposite vowel" pattern. Let's learn how to conjugate them!

Objectives

By the end of this chapter, you will be able to:

Introduction/Warm-up

The process for forming the Present Subjunctive for -ER and -IR verbs is identical to that of -AR verbs: start with the "yo" form of the Present Indicative, drop the "-o", and add the subjunctive endings. The key difference lies in the endings themselves.

(Optional Review): What is the "yo" form of comer (to eat) in the present indicative? (como). And for vivir (to live)? (vivo). These will be our starting points.

Presentation of New Material: Forming the Present Subjunctive (-ER and -IR Verbs)

The Three-Step Process (Same as -AR verbs)

  1. Start with the "yo" form of the Present Indicative tense.
    comer (to eat) → yo como
    vivir (to live) → yo vivo
    aprender (to learn) → yo aprendo
  2. Drop the "-o" ending.
    comocom-
    vivoviv-
    aprendoaprend-

    (This gives you the subjunctive stem.)

  3. Add the Present Subjunctive endings for -ER and -IR verbs.

    These endings use the "opposite vowel" 'a' because -ER and -IR verbs use 'e' or 'i' as their thematic vowels in the indicative.

Present Subjunctive Endings for Regular -ER and -IR Verbs

Pronoun -ER/-IR Subjunctive Ending comer (to eat) vivir (to live)
yo -a coma viva
-as comas vivas
él/ella/usted -a coma viva
nosotros/as -amos comamos vivamos
vosotros/as -áis comáis viváis
ellos/ellas/ustedes -an coman vivan

Notice: The "yo" and "él/ella/usted" forms are the same (ending in -a). The "nosotros" form ends in -amos, and the "vosotros" form ends in -áis (with an accent on the 'a').

More Examples (Regular -ER and -IR Verbs):

Aprender (to learn -ER) → (yo) aprendo → aprend-

Es bueno que nosotros aprendamos cosas nuevas. (It's good that we learn new things.)

Escribir (to write -IR) → (yo) escribo → escrib-

Quiero que tú me escribas una carta. (I want you to write me a letter.)
Dudo que ellos escriban el informe hoy. (I doubt that they will write the report today.)

Pronunciation Tips:

Practice Activities


Recognition Practice:
Exercise 1: Identify the Subjunctive Stem (-ER/-IR)

Instructions: For each infinitive, write its "yo" present indicative form and the subjunctive stem.

  1. beber → yo: _________, stem: _________
  2. abrir → yo: _________, stem: _________
  3. correr → yo: _________, stem: _________
  4. decidir → yo: _________, stem: _________
  5. comprender → yo: _________, stem: _________

Answer Key:

  1. yo: bebo, stem: beb-
  2. yo: abro, stem: abr-
  3. yo: corro, stem: corr-
  4. yo: decido, stem: decid-
  5. yo: comprendo, stem: comprend-
Exercise 2: Match Pronoun to Subjunctive Form (-ER/-IR)

Instructions: Match the pronoun with the correct present subjunctive form of "vivir" (to live).

 yo               (  ) viváis
 tú               (  ) vivan
 él               (  ) viva (yo/él/ella form)
 nosotros         (  ) vivas
 vosotros         (  ) vivamos
 ustedes          (  ) viva (yo/él/ella form)

Answer Key:

 yo               →   viva
 tú               →   vivas
 él               →   viva
 nosotros         →   vivamos
 vosotros         →   viváis
 ustedes          →   vivan

Production Practice:
Exercise 1: Conjugate -ER/-IR Verbs in Present Subjunctive

Instructions: Write the correct present subjunctive form of the verb in parentheses for the given subject.

  1. (yo / comer) → ___________
  2. (tú / escribir) → ___________
  3. (él / aprender) → ___________
  4. (nosotros / beber) → ___________
  5. (vosotros / abrir) → ___________
  6. (ellas / decidir) → ___________
  7. (usted / comprender) → ___________

Answer Key:

  1. coma
  2. escribas
  3. aprenda
  4. bebamos
  5. abráis
  6. decidan
  7. comprenda
Exercise 2: Simple Sentences (Conceptual)

Instructions: Using the trigger "Es necesario que..." (It is necessary that...), complete the sentences with the correct subjunctive form of the verb.

  1. Es necesario que yo ___________ (comer) más verduras.
  2. Es necesario que nosotros ___________ (vivir) en paz.
  3. Es necesario que él ___________ (aprender) las reglas.

Answer Key:

  1. coma
  2. vivamos
  3. aprenda

Cultural Insight: Suggestions, Recommendations, and Doubts

The Present Subjunctive, which you're learning to form with -ER and -IR verbs in this chapter, is incredibly prevalent in everyday recommendations, suggestions, and expressions of doubt across Spanish-speaking cultures. When someone says, "Te recomiendo que comas la paella aquí" (I recommend that you eat the paella here), or "Es importante que vivas el momento" (It's important that you live the moment), they are using the subjunctive to influence, advise, or express a subjective viewpoint about an action.

Understanding this grammatical mood helps you decode these nuances. For example, if a friend says, "Dudo que él escriba la carta" (I doubt that he will write the letter), the use of the subjunctive immediately signals their lack of certainty. As you become more attuned to these forms, you'll gain a deeper understanding of the speaker's perspective and the subtle dynamics of social interaction in Spanish. It's a key to moving beyond literal translations and grasping the underlying intent.

Language Nuances: Present Subjunctive -ER/-IR Verbs

1. The "Opposite Vowel" Pattern Continues

As predicted! Since regular -ER verbs use "e" as their thematic vowel in the indicative (e.g., comes, come, comemos) and -IR verbs use "i" or "e" (e.g., vives, vive, vivimos), their subjunctive forms switch to using "a"-based endings.

  • Present Indicative (-ER): -o, -es, -e, -emos, -éis, -en
  • Present Subjunctive (-ER): -a, -as, -a, -amos, -áis, -an
  • Present Indicative (-IR): -o, -es, -e, -imos, -ís, -en
  • Present Subjunctive (-IR): -a, -as, -a, -amos, -áis, -an

This "opposite vowel" trick is a great way to remember the basic subjunctive endings for regular verbs.

2. Stem Consistency for Regular Verbs

Just like with regular -AR verbs, for regular -ER and -IR verbs, the stem derived from the "yo" present indicative form (after dropping the -o) remains consistent for all persons in the present subjunctive.

Example (comer): Stem is "com-". All forms use this: coma, comas, coma, comamos, comáis, coman.

Example (vivir): Stem is "viv-". All forms use this: viva, vivas, viva, vivamos, viváis, vivan.

(Verbs that are stem-changing in the present indicative will often have stem changes in the subjunctive too, which we'll cover in the irregulars chapter.)

Review and Consolidation

Key Formation Steps:
  1. Start with "yo" form of Present Indicative.
  2. Drop the "-o".
  3. Add Present Subjunctive -ER/-IR endings: -a, -as, -a, -amos, -áis, -an.
Self-Assessment:

Looking Ahead

¡Excelente! You now know how to form the Present Subjunctive for all regular -AR, -ER, and -IR verbs. This is a massive step! In the next chapter, we'll tackle the common irregular verbs in the Present Subjunctive, including the "DISHES" verbs and some important stem-changing verbs. After that, we'll be ready to put it all into practice with the WEIRDO triggers!


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