Ayunar in the Present Tense

Ayunar means “to fast”, and this page covers exactly one thing: ayunar in the present tense. The present is the tense Spanish speakers reach for when they talk about routines, facts and what is happening now. On this page you will find the full present table for ayunar, how the tense is formed for this verb, the situations where it is used, how it differs from the preterite, worked examples, the mistakes learners make most often, an eight-question quiz with explained answers, and answers to the questions students ask about ayunar in the present. For example: “Yo ayuno durante el Ramadán.” — I fast during Ramadan. Everything on this page uses the forms of ayunar exactly as they are conjugated in the present, so you can trust every form you see here.

Ayunar in the Present Tense — full table

Person Form
yo ayuno
tú ayunas
él/ella/Ud. ayuna
nosotros/as ayunamos
vosotros/as ayunáis
ellos/ellas/Uds. ayunan

Gerund: ayunando · Past participle: ayunado

The gerund is ayunando, which you use with estar to say what is happening right now: “Estoy ayunando” means the action of ayunar is in progress at this very moment. The past participle is ayunado, which you use with haber in the perfect tenses: “he ayunado” is the present perfect, used for a completed action. Keep both forms in mind as you read the examples below, because the present is only one part of how ayunar is used.

How the present of ayunar is formed

Ayunar is regular in the present tense. Take the stem ayun and add the present endings for -ar verbs: -o, -as, -a, -amos, -áis, -an, giving ayuno, ayunas, ayuna, ayunamos, ayunáis, ayunan. Watch the accents: the yo form is ayuno and the él/ella/Ud. form is ayuna.

When to use the present of ayunar

The present is not a single-purpose tense. Below are the five situations where you will use ayunar in the present most often. Each one comes with a real example, so read the rule, then say the example out loud.

1. Routines and habits

The present tense is the tense of what you do regularly. When something happens every day, every week or every morning, the present is the right choice, and ayunar is no exception. Example: “Yo ayuno durante el Ramadán todos los días.” — I fast during Ramadan every day.

2. Facts and general truths

The present states facts that are true in general, not just right now. Use it to say what ayunar means in practice and how it works in the world. Example: “Ayuna antes del análisis de sangre.” — He/she fasts before the blood test.

3. What is happening right now

The present also describes actions in progress at this very moment. When something is happening as you speak, the present tense says so directly. Example: “Yo ayuno un día a la semana ahora.” — I fast one day a week now.

4. Scheduled events in the near future

Spanish often uses the present for things that are already arranged, such as plans for tomorrow or next week. The present sounds more certain than the future in these cases. Example: “Nosotros ayunamos desde anoche hasta mediodía.” — We fast from last night until midday.

5. Instructions and everyday speech

In everyday speech the present gives instructions, makes offers and states what someone does. It is the tense you will hear most often in conversation. Example: “Tú ayunas durante el Ramadán.” — You fast during Ramadan.

Present Tense vs Preterite: how to choose

The closest tense to the present is the preterite, and choosing between them is one of the first decisions in Spanish. The rule is simple: the present describes routines, facts and what is happening now, while the preterite reports one finished action. The three pairs below use the same verb, so the only thing that changes is whether the action is a habit or a finished event. Time words help: todos los días and cada semana point to the present, while ayer and la semana pasada point to the preterite.

  • Present Tense: “Yo ayuno durante el Ramadán todos los días.” — I fast during Ramadan every day.

  • Preterite: “Ayer, yo ayuné durante el Ramadán.” — Yesterday, I fasted during Ramadan.

  • The present sentence describes a habit; the preterite sentence reports one finished action. Todos los días points to the present, ayer points to the preterite.

  • Present Tense: “Él ayuna antes del análisis de sangre cada semana.” — He/she fasts before the blood test every week.

  • Preterite: “La semana pasada, él ayunó antes del análisis de sangre.” — Last week, he fasted before the blood test.

  • Cada semana describes a routine, so the present is right; la semana pasada names one finished week, so the preterite is right.

  • Present Tense: “Nosotros ayunamos un día a la semana a menudo.” — We fast one day a week often.

  • Preterite: “Ayer, nosotros ayunamos un día a la semana.” — Yesterday, we fasted one day a week.

  • The present sentence counts no single event; the preterite sentence counts one finished action. That difference — habit versus finished event — is the whole decision.

Example sentences: ayunar in the present

Read these eight sentences out loud. They cover all six persons, so by the end you will have seen every form in the table used in a real sentence. Pay attention to the words around the verb — the time expressions, the objects, the other verbs — because those are what make each sentence sound natural.

  1. “Ayuno durante el Ramadán.” — I fast during Ramadan.

  2. “Ayunas antes del análisis de sangre.” — You fast before the blood test.

  3. “Ayuna un día a la semana.” — He/she fasts one day a week.

  4. “Ayunamos desde anoche hasta mediodía.” — We fast from last night until midday.

  5. “Ayunáis durante el Ramadán.” — You fast during Ramadan.

  6. “Ayunan antes del análisis de sangre.” — They fast before the blood test.

  7. “Ayuno un día a la semana.” — I fast one day a week.

  8. “Ayuna desde anoche hasta mediodía.” — He/she fasts from last night until midday.

Common mistakes with ayunar in the present

These are the errors learners actually make with this verb in this tense. Each one shows the wrong version, the right version, and why the correction matters.

  • Wrong: “Ellos ayuna durante el Ramadán.” Right: “Ellos ayunan durante el Ramadán.” Why: Ellos needs the ellos form ayunan. The singular ayuna belongs with él, ella or a singular noun.

  • Wrong: “Yo ayuno antes del análisis de sangre ayer.” Right: “Ayer yo ayuné antes del análisis de sangre.” Why: The present tense cannot describe a finished action yesterday. Ayer forces the preterite, so the form must change to ayuné.

  • Wrong: “Nosotros ayunas un día a la semana.” Right: “Nosotros ayunamos un día a la semana.” Why: Nosotros needs ayunamos. The tú form ayunas belongs with tú.

  • Wrong: “Ellos ayuno desde anoche hasta mediodía todos los días.” Right: “Ellos ayunan desde anoche hasta mediodía todos los días.” Why: The verb must agree with its subject. Ellos needs the ellos form ayunan, not the yo form ayuno. This is the most common agreement slip in the present tense, and it happens because learners memorise the yo form first and then reuse it for every person.

Quiz: ayunar in the present

Choose the correct answer for each question, then check the answer key. Every answer is explained, so a wrong answer still teaches you something.

1. Complete the sentence: “Yo ______ durante el Ramadán.” (During ramadan.)

  • (a) ayuno
  • (b) ayunas
  • (c) ayuna

Answer: ayuno — The yo form of ayunar in the present is ayuno. The other options are the forms for different persons, so they do not agree with the subject.

2. Complete the sentence: “¿Tú ______ antes del análisis de sangre?” (Before the blood test.)

  • (a) ayuno
  • (b) ayuna
  • (c) ayunas

Answer: ayunas — The tú form of ayunar in the present is ayunas. The other options are the forms for different persons, so they do not agree with the subject.

3. Complete the sentence: “Él ______ un día a la semana.” (One day a week.)

  • (a) ayunas
  • (b) ayuna
  • (c) ayuno

Answer: ayuna — The él/ella/Ud. form of ayunar in the present is ayuna. The other options are the forms for different persons, so they do not agree with the subject.

4. Complete the sentence: “Nosotros ______ desde anoche hasta mediodía.” (From last night until midday.)

  • (a) ayunamos
  • (b) ayuno
  • (c) ayunas

Answer: ayunamos — The nosotros/as form of ayunar in the present is ayunamos. The other options are the forms for different persons, so they do not agree with the subject.

5. What is the vosotros/as form of ayunar in the present?

  • (a) ayuno
  • (b) ayunas
  • (c) ayunáis

Answer: ayunáis — From the table above: vosotros/as takes ayunáis. Say it with the example sentence “Vosotros ayunáis durante el Ramadán.” to fix it in your memory.

6. Complete the sentence: “Ellos ______ antes del análisis de sangre.” (Before the blood test.)

  • (a) ayunas
  • (b) ayunan
  • (c) ayuno

Answer: ayunan — The ellos/ellas/Uds. form of ayunar in the present is ayunan. The other options are the forms for different persons, so they do not agree with the subject.

7. Which is the correct yo form of ayunar in the present?

  • (a) ayuno
  • (b) ayunas
  • (c) ayuna

Answer: ayuno — The yo form is ayuno. The other two options are the forms for other persons.

8. Which sentence describes a habit in the present?

  • (a) Yo ayuné durante el Ramadán todos los días.
  • (b) Nosotros ayunaremos durante el Ramadán mañana.
  • (c) Yo ayuno durante el Ramadán todos los días.

Answer: Yo ayuno durante el Ramadán todos los días. — “Yo ayuno durante el Ramadán todos los días.” describes a habit, so it takes the present. The second option reports a finished action in the past, and the third looks to the future.

Frequently asked questions

Is ayunar regular in the present?

Yes. Ayunar is regular in the present: ayuno, ayunas, ayuna, ayunamos, ayunáis, ayunan. Watch the accents on the yo and él forms, and remember that only context tells the nosotros form apart from the present-tense nosotros form when they are identical.

What is the past participle of ayunar?

The past participle is ayunado: 'He ayunado' means 'I have fasted'. It is used with haber in every perfect tense. The gerund is ayunando.

Does ayunar take a preposition?

It depends on the meaning. Ayunar is fully regular: ayuné, ayunaba, ayunaré. Ayunar durante el Ramadán is to fast during Ramadan. In the examples on this page, ayunar appears with complements such as durante el Ramadán and antes del análisis de sangre, so copy those patterns when you write your own sentences.

How do I remember the present forms of ayunar?

Say the six forms out loud in order, three times, with a real sentence for each one: yo ayuno, tú ayunas, él/ella/Ud. ayuna, nosotros/as ayunamos, vosotros/as ayunáis, ellos/ellas/Uds. ayunan. Then write three of your own sentences with ayunar in the present, using the examples on this page as models.

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