Interesar Conjugation | How to Conjugate Interesar in Spanish

Interesar means “to interest” and often “to be of interest to.” You will learn its regular -AR conjugation and the experiencer pattern behind me interesa and me interesan.

Interesar conjugation at a glance

Verb type: Regular AR. Interesar keeps the stable stem interes- and takes normal -AR endings. Its common experiencer pattern uses the thing of interest as the grammatical subject and an indirect-object pronoun for the interested person.

Interesar gerund, past participle, and infinitive

The infinitive names the verb, the gerund supports progressive constructions, and the past participle combines with haber — “to have” as an auxiliary — in compound forms. The participle interesado remains invariant in those compounds.

Form	Spanish	Natural English guide
Infinitive	interesar	to interest / matter to
Gerund	interesando	interesting / mattering to
Past participle	interesado	interested / mattered to

Interesar meaning and essential uses

In the common learner-facing construction, interesar means “to interest / be of interest to”: Me interesa la historia. — “History interests me / I am interested in history.”

Agreement follows the thing that interests someone: Me interesa este curso. — “This course interests me.” but Me interesan estos cursos. — “These courses interest me.” RAE also records transitive and pronominal uses, including interesarse por — “to become / be interested in.”

Interesar regular conjugation pattern

The morphology is fully regular: intereso, interesas, interesa, interesamos, interesáis, interesan. The everyday experiencer use makes third-person singular and plural forms especially frequent.

The gerund interesando — “interesting” — and participle interesado — “interested” — are regular. The syntax, not the conjugation, is the main challenge for English speakers.

Interesar indicative and periphrastic conjugations

Interesar present tense conjugation

Present indicative (el presente de indicativo) — Use it for current situations, habits, facts, and contextually near-future reference. The verb uses the regular -AR forms shown below.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	intereso	I interest / matter to
Tú — you, singular informal	interesas	you interest / matter to
Él / Ella / Usted — he / she / you, singular formal	interesa	he / she interests / matters to; you interest / matter to (formal)
Nosotros / Nosotras — we	interesamos	we interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesáis	you interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesan	they interest / matter to; you interest / matter to (plural)

• Me interesa mucho la historia. — History interests me a lot.

Interesar preterite conjugation

Preterite (el pretérito perfecto simple / pretérito indefinido) — Use it for completed or bounded past events. The verb uses the regular -AR forms shown below.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesé	I interested / mattered to
Tú — you, singular informal	interesaste	you interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	interesó	he / she interested / mattered to; you interested / mattered to (formal)
Nosotros / Nosotras — we	interesamos	we interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesasteis	you interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesaron	they interested / mattered to; you interested / mattered to (plural)

• Ayer me interesó una propuesta nueva. — A new proposal interested me yesterday.

Interesar imperfect conjugation

Imperfect (el pretérito imperfecto) — Use it for habitual, descriptive, background, or ongoing past situations. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesaba	I used to interest / matter to / was interesting / mattering to
Tú — you, singular informal	interesabas	you used to interest / matter to / were interesting / mattering to
Él / Ella / Usted — he / she / you, singular formal	interesaba	he / she used to interest / matter to / was interesting / mattering to; you used to interest / matter to / were interesting / mattering to (formal)
Nosotros / Nosotras — we	interesábamos	we used to interest / matter to / were interesting / mattering to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesabais	you used to interest / matter to / were interesting / mattering to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesaban	they used to interest / matter to / were interesting / mattering to; you used to interest / matter to / were interesting / mattering to (plural)

• Antes me interesaban más esos temas. — Those topics used to interest me more.

Interesar present progressive

Present progressive — This verbal periphrasis focuses on an action or process in progress. Form it with present estar — “to be” — plus interesando — “interesting / mattering to.”

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	estoy interesando	I am interesting / mattering to
Tú — you, singular informal	estás interesando	you are interesting / mattering to
Él / Ella / Usted — he / she / you, singular formal	está interesando	he / she is interesting / mattering to; you are interesting / mattering to (formal)
Nosotros / Nosotras — we	estamos interesando	we are interesting / mattering to
Vosotros / Vosotras — you, plural informal, mainly Spain	estáis interesando	you are interesting / mattering to (plural)
Ellos / Ellas / Ustedes — they / you, plural	están interesando	they are interesting / mattering to; you are interesting / mattering to (plural)

• Me está interesando este libro. — This book is becoming interesting to me.

Interesar near future conjugation

Near future — This verbal periphrasis expresses an intention, plan, or expected event. Form it with present ir — “to go” — plus a — “to” — and interesar.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	voy a interesar	I am going to interest / matter to
Tú — you, singular informal	vas a interesar	you are going to interest / matter to
Él / Ella / Usted — he / she / you, singular formal	va a interesar	he / she is going to interest / matter to; you are going to interest / matter to (formal)
Nosotros / Nosotras — we	vamos a interesar	we are going to interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	vais a interesar	you are going to interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	van a interesar	they are going to interest / matter to; you are going to interest / matter to (plural)

• Te va a interesar esta noticia. — This news is going to interest you.

Interesar future tense conjugation

Simple future (el futuro simple) — Use it for future reference and, where useful, probability. The verb uses the regular -AR forms shown below.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesaré	I will interest / matter to
Tú — you, singular informal	interesarás	you will interest / matter to
Él / Ella / Usted — he / she / you, singular formal	interesará	he / she will interest / matter to; you will interest / matter to (formal)
Nosotros / Nosotras — we	interesaremos	we will interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesaréis	you will interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesarán	they will interest / matter to; you will interest / matter to (plural)

• Les interesará la nueva oferta. — The new offer will interest them.

Interesar conditional conjugation

Conditional (el condicional simple) — Use it for hypothetical outcomes, softened statements, or related conditional meanings. The verb uses the regular -AR forms shown below.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesaría	I would interest / matter to
Tú — you, singular informal	interesarías	you would interest / matter to
Él / Ella / Usted — he / she / you, singular formal	interesaría	he / she would interest / matter to; you would interest / matter to (formal)
Nosotros / Nosotras — we	interesaríamos	we would interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesaríais	you would interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesarían	they would interest / matter to; you would interest / matter to (plural)

• Me interesaría conocer los detalles. — I would be interested in knowing the details.

Interesar present perfect conjugation

Present perfect (el pretérito perfecto compuesto) — Use it for completed events connected to a present reference frame; regional distribution varies. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	he interesado	I have interested / mattered to
Tú — you, singular informal	has interesado	you have interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	ha interesado	he / she has interested / mattered to; you have interested / mattered to (formal)
Nosotros / Nosotras — we	hemos interesado	we have interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	habéis interesado	you have interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	han interesado	they have interested / mattered to; you have interested / mattered to (plural)

• Me ha interesado mucho el tema. — The topic has interested me a lot.

Interesar past perfect conjugation

Past perfect (el pretérito pluscuamperfecto) — Use it for an event completed before another past reference point. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	había interesado	I had interested / mattered to
Tú — you, singular informal	habías interesado	you had interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	había interesado	he / she had interested / mattered to; you had interested / mattered to (formal)
Nosotros / Nosotras — we	habíamos interesado	we had interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	habíais interesado	you had interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	habían interesado	they had interested / mattered to; you had interested / mattered to (plural)

• Nos había interesado la primera propuesta. — The first proposal had interested us.

Interesar future perfect conjugation

Future perfect (el futuro perfecto) — Use it for an event expected to be completed before a future reference point. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	habré interesado	I will have interested / mattered to
Tú — you, singular informal	habrás interesado	you will have interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	habrá interesado	he / she will have interested / mattered to; you will have interested / mattered to (formal)
Nosotros / Nosotras — we	habremos interesado	we will have interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	habréis interesado	you will have interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	habrán interesado	they will have interested / mattered to; you will have interested / mattered to (plural)

• Para entonces les habrá interesado otra opción. — By then another option will have interested them.

Interesar conditional perfect conjugation

Conditional perfect (el condicional compuesto) — Use it for a hypothetical completed outcome. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	habría interesado	I would have interested / mattered to
Tú — you, singular informal	habrías interesado	you would have interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	habría interesado	he / she would have interested / mattered to; you would have interested / mattered to (formal)
Nosotros / Nosotras — we	habríamos interesado	we would have interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	habríais interesado	you would have interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	habrían interesado	they would have interested / mattered to; you would have interested / mattered to (plural)

• Me habría interesado asistir. — I would have been interested in attending.

Interesar subjunctive conjugations

Interesar present subjunctive conjugation

Present subjunctive (el presente de subjuntivo) — Use it in subordinate environments involving wishes, influence, emotion, doubt or denial, evaluation, necessity, possibility, or non-specific reference. The verb uses the regular -AR forms shown below.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interese	that I interest / matter to
Tú — you, singular informal	intereses	that you interest / matter to
Él / Ella / Usted — he / she / you, singular formal	interese	that he / she interest / matter to; that you interest / matter to (formal)
Nosotros / Nosotras — we	interesemos	that we interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	intereséis	that you interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesen	that they interest / matter to; that you interest / matter to (plural)

• Espero que te interese el curso. — I hope the course interests you.

Interesar imperfect subjunctive conjugation

Imperfect subjunctive (el imperfecto de subjuntivo) — The main table uses the -ra series. The accepted -se series is also valid in many contexts and is demonstrated after the table. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesara	that I interested / mattered to
Tú — you, singular informal	interesaras	that you interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	interesara	that he / she interested / mattered to; that you interested / mattered to (formal)
Nosotros / Nosotras — we	interesáramos	that we interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesarais	that you interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesaran	that they interested / mattered to; that you interested / mattered to (plural)

• Querían que nos interesara el proyecto. — They wanted the project to interest us.
• Preferían que te interesase esa área. — They preferred that that area interest you.

Interesar future subjunctive conjugation

Future subjunctive (el futuro de subjuntivo) — Rare in modern everyday Spanish. It survives mainly in formal, legal, proverbial, literary, or historical contexts. These rare forms share the same historical stem family as the imperfect subjunctive.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	interesare	if / when I should interest / matter to
Tú — you, singular informal	interesares	if / when you should interest / matter to
Él / Ella / Usted — he / she / you, singular formal	interesare	if / when he / she should interest / matter to; if / when you should interest / matter to (formal)
Nosotros / Nosotras — we	interesáremos	if / when we should interest / matter to
Vosotros / Vosotras — you, plural informal, mainly Spain	interesareis	if / when you should interest / matter to (plural)
Ellos / Ellas / Ustedes — they / you, plural	interesaren	if / when they should interest / matter to; if / when you should interest / matter to (plural)

• A quien interesare la propuesta podrá solicitar información. — Whoever should be interested in the proposal may request information.

Interesar present perfect subjunctive conjugation

Present perfect subjunctive (el pretérito perfecto de subjuntivo) — Use it when a completed event appears inside a present- or future-oriented subjunctive environment. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	haya interesado	that I have interested / mattered to
Tú — you, singular informal	hayas interesado	that you have interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	haya interesado	that he / she has interested / mattered to; that you have interested / mattered to (formal)
Nosotros / Nosotras — we	hayamos interesado	that we have interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	hayáis interesado	that you have interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	hayan interesado	that they have interested / mattered to; that you have interested / mattered to (plural)

• Me alegra que te haya interesado la charla. — I am glad the talk interested you.

Interesar past perfect subjunctive conjugation

Past perfect subjunctive (el pluscuamperfecto de subjuntivo) — The main table uses hubiera; hubiese is an accepted auxiliary alternative in many contexts and is demonstrated after the table. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	hubiera interesado	that I had interested / mattered to
Tú — you, singular informal	hubieras interesado	that you had interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	hubiera interesado	that he / she had interested / mattered to; that you had interested / mattered to (formal)
Nosotros / Nosotras — we	hubiéramos interesado	that we had interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	hubierais interesado	that you had interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	hubieran interesado	that they had interested / mattered to; that you had interested / mattered to (plural)

• Si me hubiera interesado el puesto, habría presentado la solicitud. — If the position had interested me, I would have applied.
• Si te hubiese interesado el curso, habrías preguntado antes. — If the course had interested you, you would have asked earlier.

Interesar future perfect subjunctive conjugation

Future perfect subjunctive (el futuro perfecto de subjuntivo) — Rare in modern everyday Spanish. Treat it as a formal or historical reference form, not an everyday conversational target. Form it with the appropriate form of haber — “to have” as an auxiliary — plus the invariant participle interesado.

Pronoun and English meaning	Spanish	Natural English guide
Yo — I	hubiere interesado	if / when I should have interested / mattered to
Tú — you, singular informal	hubieres interesado	if / when you should have interested / mattered to
Él / Ella / Usted — he / she / you, singular formal	hubiere interesado	if / when he / she should have interested / mattered to; if / when you should have interested / mattered to (formal)
Nosotros / Nosotras — we	hubiéremos interesado	if / when we should have interested / mattered to
Vosotros / Vosotras — you, plural informal, mainly Spain	hubiereis interesado	if / when you should have interested / mattered to (plural)
Ellos / Ellas / Ustedes — they / you, plural	hubieren interesado	if / when they should have interested / mattered to; if / when you should have interested / mattered to (plural)

• Si les hubiere interesado la oferta, podrán responder. — If the offer should have interested them, they may respond.

Interesar imperative and commands

Commands address another person directly. The nosotros/nosotras row is a present-subjunctive form used with exhortative “let’s…” value.

Interesar affirmative commands

Use the verified affirmative command forms for direct instructions when the target meaning supports them naturally.

Pronoun and English meaning	Spanish	Natural English guide
Tú — you, singular informal	interesa	interest
Usted — you, singular formal	interese	interest (formal)
Nosotros / Nosotras — we; let’s…	interesemos	let’s interest
Vosotros / Vosotras — you, plural informal, mainly Spain	interesad	interest (plural, mainly Spain)
Ustedes — you, plural	interesen	interest (plural)

• Interesa al público con un buen ejemplo. — Interest the audience with a good example.

Interesar negative commands

Negative commands use subjunctive-based forms, with no — “not / do not” — before the command form.

Pronoun and English meaning	Spanish	Natural English guide
Tú — you, singular informal	no intereses	do not interest
Usted — you, singular formal	no interese	do not interest (formal)
Nosotros / Nosotras — we; let’s…	no interesemos	let’s not interest
Vosotros / Vosotras — you, plural informal, mainly Spain	no intereséis	do not interest (plural, mainly Spain)
Ustedes — you, plural	no interesen	do not interest (plural)

• No intereses a los alumnos con información engañosa. — Do not interest the students with misleading information.

Common constructions with Interesar

These patterns show sentence frames that materially affect how the target verb is used.

• me interesa + singular noun or infinitive. — a singular thing or activity interests me.
• me interesan + plural noun. — plural things interest me.
• interesarse por algo. — to be / become interested in something.

Example sentences with Interesar

These examples reinforce the target verb across useful forms and contexts already taught in the lesson.

• Me interesa aprender más. — I am interested in learning more.
• Nos interesan los cursos de conversación. — Conversation courses interest us.
• A Marta le interesa la fotografía. — Marta is interested in photography.
• Este tema me está interesando mucho. — This topic is really interesting me.
• Espero que te interese la propuesta. — I hope the proposal interests you.
• Se interesa por la historia local. — He / she is interested in local history.

Regional and usage notes for Interesar

The core tables retain tú, usted, vosotros/vosotras, and ustedes for project comparability. Voseo changes some common second-person singular forms in regions where vos — “you, singular informal” — is used.

• A vos te interesa este tema. — This topic interests you. (voseo experiencer use)
• Vos interesás al público con buenos ejemplos. — You interest the audience with good examples. (personal voseo use)

Interesar is regular in form but requires careful agreement. In the common experiencer pattern, choose the verb number from the thing that interests someone and the indirect-object pronoun from the experiencer.