Kilo Lingo
Part of Chapter 19

CEFR B1-B2

5 min read

Test yourself (33 questions)

Forming the Present Subjunctive

The present subjunctive is the mood Spanish uses for things that are wished, doubted, requested, denied or merely hypothetical rather than flatly stated as fact. That is a job for a sister page. This page is about the machinery: how to actually build the forms. The good news is that the formation is more regular than the indicative you already know.

There are two things to internalise: the yo-form stem and the opposite-vowel endings. Get those two and you can conjugate almost anything.

Step one: build from the yo-form

Every present subjunctive starts from the yo-form of the present indicative, with the final -o removed. That stem is the foundation for all six persons.

  • -> yo -> stem habl-
  • -> yo -> stem com-
  • -> yo -> stem viv-

This matters most for verbs that are irregular in the yo-form, because that irregularity is inherited by the whole subjunctive:

  • -> yo -> , , ...
  • -> yo -> , , ...
  • -> yo -> , , ...
  • -> yo -> , , ...
  • -> yo -> , , ...
  • -> yo -> , , ...

If you know the yo-form, you know the subjunctive stem. This is why most "irregular" verbs are not irregular in the subjunctive at all.

Step two: add the opposite vowel

Now the endings. The rule is a vowel swap: -ar verbs take the e-set, -er and - verbs take the a-set. The verb borrows the dominant vowel of the other family.

Personhablar (-ar)comer (-er)vivir (-ir)
yo
/ /
/ /

Note that the yo and // forms are identical in every verb (hable / hable, coma / coma). That ambiguity is normal; context and pronouns sort it out.

The accent on , , is not decorative. Leave it off and you have written something else.

The six true irregulars

Six verbs have subjunctive stems you cannot reach from the yo-form. There is no trick. Learn them.

InfinitiveSubjunctive stemFull set
sea-sea, seas, sea, , ,
-, , , , ,
-, , , , ,
-, , , , ,
-, , , , ,
-, , , , ,

A few things to flag. carries an accent on (yo and él/ella) purely to distinguish it from the preposition ; the rest of the set is unaccented. , mirroring its indicative, accents every form except . And here is the subjunctive of the auxiliary, which is what you need to build the present perfect subjunctive ( ) later on.

Stem-changing verbs

Stem-changing verbs mostly behave as you would expect, because the change rides in through the yo-form.

-ar and -er stem-changers change in the same persons as the indicative (everywhere except nosotros and vosotros):

  • (e -> ie): , , , , ,
  • (o -> ue): , , , , ,

- stem-changers do something extra. On top of the main change, the and forms take a smaller change (e -> i, or o -> u). This catches people out:

  • (e -> i throughout): , , , , ,
  • (e -> ie, but i in nosotros/vosotros): , , , , ,
  • (o -> ue, but u in nosotros/vosotros): , , , , ,

That / weakening is the one stem-change pattern worth drilling, because it has no parallel in the present indicative.

Spelling-change verbs

Some verbs change their spelling to preserve the sound of the final consonant when the vowel flips. These are not irregular; they are obeying Spanish spelling rules.

EndingChangeExample
-carc -> qubuscar -> busque, busques, busque
-garg -> gullegar -> llegue, llegues, llegue
-z -> cempezar -> , (and stem-change)
-ger/-girg -> jescoger -> escoja, dirigir -> dirija
-guirgu -> gseguir -> , ,

The logic: c before e would soften to a "th"/"s" sound, so -car verbs swap to qu to keep the hard "k". The same instinct drives all five rows.

Present subjunctive practice

Tables teach recognition; only production makes the forms yours, and the opposite-vowel rule in particular needs to become reflex rather than calculation. So this page carries its own conjugation practice:

  • The interactive quiz - the test yourself section below runs over 30 questions: gap-fills that make you build each form from the yo-stem, a spot-the-correct-form round seeded with the classic wrong answers ("vienas", "tenamos", missing accents, unswitched indicatives), translations, and infinitive-to-form matching. Marked as you go.
  • Printable worksheets - the same drill as printable sheets with the answer keys built in, if you would rather conjugate on paper.

Aim the reps at the three known weak points: the -ir stem-changer nosotros forms (, ), the spelling changes (busque, llegue, ) and the six true irregulars. Everything else falls out of the yo-stem rule.

What this page does not cover

You can now build the present subjunctive of more or less any verb. What you still need is the trigger: the words and structures that flip a clause from indicative into subjunctive in the first place. Wanting, hoping and wishing are the gateway. That is the subjunctive after verbs of wishing page.

See also

Practise: test yourself

Fill in the blank

0/9

Write the present subjunctive form of the verb in brackets to match the subject.

  1. Espero que tú más. (hablar) (ar verb, e-set)

  2. Quiero que ella bien. (comer) (er verb, a-set)

  3. Es importante que nosotros aquí. (vivir) (ir verb, a-set)

  4. Dudo que ellos tiempo. (tener) (yo-stem teng-)

  5. Ojalá que él en casa. (estar) (true irregular, accent)

  6. Quiero que tú la verdad. (decir) (yo-stem dig-)

  7. Espero que ella aquí. (estar) (true irregular, accent)

  8. Es importante que ellos a tiempo. (llegar) (g to gu spelling change)

  9. Dudo que nosotros tiempo. (tener) (yo-stem teng-)

Translation drill

0/8

Translate each sentence into Spanish using a present subjunctive verb.

  1. I hope that you (tú) speak more.

  2. It is important that we live here.

  3. I want her to be at home.

  4. I doubt that they know the answer.

  5. I hope that you (tú) eat well.

  6. It is important that they have time.

  7. I want you (tú) to do it.

  8. I doubt that he is at home.

Matching

0/8

Match each infinitive on the left to its yo present subjunctive form on the right.

Pick the right one

0/8

Pick the correctly built present subjunctive. The wrong options are the classic slips: invented stems, indicative forms that never switched mood, and missing spelling changes.

  1. Espero que pronto. (venir, tú)

  2. Quiero que lo ellos. (hacer)

  3. Ojalá suerte. (tener, nosotros)

  4. Dudo que verdad. (ser)

  5. Es importante que temprano. (empezar, ellos)

  6. Quiero que a la fiesta. (ir, tú)

  7. No creo que lo ella. (saber)

  8. Espero que bien. (dormir, ellos)

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Frequently asked questions

How do you form the Spanish present subjunctive?
Start from the yo-form of the present indicative, drop the final o, and add the opposite-vowel endings. For ar verbs the endings are -e, -es, -e, -emos, -éis, -en; for er and ir verbs they are -a, -as, -a, -amos, -áis, -an. So hablo becomes hable, como becomes coma, vivo becomes viva. Because you build from the yo-form, any irregularity in the yo-form carries straight through: tengo gives tenga, conozco gives conozca, salgo gives salga.
What are the irregular present subjunctive verbs?
Six verbs have stems you cannot derive from the yo-form and simply have to learn: ser (sea), ir (vaya), haber (haya), saber (sepa), dar (dé) and estar (esté). Every other so-called irregular verb is actually regular in the subjunctive once you start from its yo-form stem, which is the whole point of the yo-stem rule.
Why does the present subjunctive use the opposite vowel?
It is a memory hook, not a deep rule, but it is reliable. Indicative ar verbs are dominated by the a sound (habla, hablas, hablan), so the subjunctive flips them to e (hable, hables, hablen). Indicative er and ir verbs lean on e and i sounds, so the subjunctive flips them to a (coma, comas, coman). Swapping the vowel is what audibly marks a verb as subjunctive.
How can I practise the present subjunctive?
Drill production, not recognition - reading a table teaches you to nod at forms, not to produce them. This page carries an interactive present subjunctive practice quiz: conjugation gap-fills that force you to build each form from the yo-stem, spot-the-correct-form questions seeded with the classic wrong answers (invented stems, missing accents), translations and a matching round. The same exercises are available as printable worksheets with answer keys from the downloads section.