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How to conjugate Diagnosticar in Spanish

diagnosticar to diagnose, to identify Irregular Verb

At a glance: Diagnosticar (to diagnose, to identify) is a irregular verb in Spanish. In the present tense: diagnostico, diagnosticas, diagnostica, diagnosticamos, diagnosticáis, diagnostican. The present tense is regular. In the preterite: yo changes c to qu (diagnostiqué); the other forms are regular. It is also irregular in the present subjunctive (diagnostique).

Past participle
diagnosticado diagnosed
Gerund
diagnosticando diagnosing
Similar
identificar
Sample Verb Conjugation Tables

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Indicative tenses of Diagnosticar

Diagnosticar in the Indicative Present

The Indicative Present of diagnosticar is used to talk about situations, events or thoughts that are happening now or in the near future. It is also used to talk about facts and truths. For example, “diagnostico”, meaning “I diagnose”.

In Spanish, the Indicative Present is known as "El Presente".

PronounSpanishEnglish
YodiagnosticoI diagnose
Túdiagnosticasyou diagnose
Ella / Él / Usteddiagnosticas/he diagnoses
Nosotras / Nosotrosdiagnosticamoswe diagnose
Vosotras / Vosotrosdiagnosticáisyou (plural) diagnose
Ellas / Ellos / Ustedesdiagnosticanthey diagnose

How it’s built: Regular: stem diagnostic- plus the -ar endings.

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Diagnosticar in the Indicative Preterite

The Indicative Preterite of diagnosticar is used to talk about actions completed in the past, at a specific point in time. For example, “diagnostiqué”, meaning “I diagnosed”.

In Spanish, the Indicative Preterite is known as "El Pretérito Indefinido".

PronounSpanishEnglish
YodiagnostiquéI diagnosed
Túdiagnosticasteyou diagnosed
Ella / Él / Usteddiagnosticós/he diagnosed
Nosotras / Nosotrosdiagnosticamoswe diagnosed
Vosotras / Vosotrosdiagnosticasteisyou (plural) diagnosed
Ellas / Ellos / Ustedesdiagnosticaronthey diagnosed

How it’s built: Yo changes c to qu (diagnostiqué); the other forms are regular.

Letters in red show where a form differs from the regular pattern.

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Diagnosticar in the Indicative Imperfect

The Indicative Imperfect of diagnosticar is used to describe regular and repeated actions that happened in the past and descriptions of things you used to do. For example, “diagnosticaba”, meaning “I used to diagnose”.

In Spanish, the Indicative Imperfect is known as "El Pretérito Imperfecto".

PronounSpanishEnglish
YodiagnosticabaI used to diagnose
Túdiagnosticabasyou used to diagnose
Ella / Él / Usteddiagnosticabas/he used to diagnose
Nosotras / Nosotrosdiagnosticábamoswe used to diagnose
Vosotras / Vosotrosdiagnosticabaisyou (plural) used to diagnose
Ellas / Ellos / Ustedesdiagnosticabanthey used to diagnose

How it’s built: Regular: stem diagnostic- plus the -ar endings.

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Diagnosticar in the Indicative Present Continuous

The Indicative Present Continuous of diagnosticar is used to talk about something that is happening continuously or right now. For example, “estoy diagnosticando”, meaning “I am diagnosing”.

In Spanish, the Indicative Present Continuous is known as "El Presente Progresivo".

PronounSpanishEnglish
Yoestoy diagnosticandoI am diagnosing
Túestás diagnosticandoyou are diagnosing
Ella / Él / Ustedestá diagnosticandos/he is diagnosing
Nosotras / Nosotrosestamos diagnosticandowe are diagnosing
Vosotras / Vosotrosestáis diagnosticandoyou (plural) are diagnosing
Ellas / Ellos / Ustedesestán diagnosticandothey are diagnosing

How it’s built: Estar in the present (estoy, estás, está, estamos, estáis, están) plus the gerund diagnosticando.

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Diagnosticar in the Indicative Informal Future

The Indicative Informal Future of diagnosticar is used to talk about something that will happen in the future, especially in the near future. For example, “voy a diagnosticar”, meaning “I am going to diagnose”.

In Spanish, the Indicative Informal Future is known as "El Futuro Próximo".

PronounSpanishEnglish
Yovoy a diagnosticarI am going to diagnose
Túvas a diagnosticaryou are going to diagnose
Ella / Él / Ustedva a diagnosticars/he is going to diagnose
Nosotras / Nosotrosvamos a diagnosticarwe are going to diagnose
Vosotras / Vosotrosvais a diagnosticaryou (plural) are going to diagnose
Ellas / Ellos / Ustedesvan a diagnosticarthey are going to diagnose

How it’s built: Ir in the present (voy, vas, va, vamos, vais, van), then a, then the infinitive diagnosticar.

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Diagnosticar in the Indicative Future

The Indicative Future of diagnosticar is used to talk about something that will happen in the future. For example, “diagnosticaré”, meaning “I will diagnose”.

In Spanish, the Indicative Future is known as "El Futuro Simple".

PronounSpanishEnglish
YodiagnosticaréI will diagnose
Túdiagnosticarásyou will diagnose
Ella / Él / Usteddiagnosticarás/he will diagnose
Nosotras / Nosotrosdiagnosticaremoswe will diagnose
Vosotras / Vosotrosdiagnosticaréisyou (plural) will diagnose
Ellas / Ellos / Ustedesdiagnosticaránthey will diagnose

How it’s built: Regular: the infinitive diagnosticar plus the future endings.

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Diagnosticar in the Indicative Conditional

The Indicative Conditional of diagnosticar is used to talk about something that may happen in the future, hypothesis and probabilities. For example, “diagnosticaría”, meaning “I would diagnose”.

In Spanish, the Indicative Conditional is known as "El Condicional Simple".

PronounSpanishEnglish
YodiagnosticaríaI would diagnose
Túdiagnosticaríasyou would diagnose
Ella / Él / Usteddiagnosticarías/he would diagnose
Nosotras / Nosotrosdiagnosticaríamoswe would diagnose
Vosotras / Vosotrosdiagnosticaríaisyou (plural) would diagnose
Ellas / Ellos / Ustedesdiagnosticaríanthey would diagnose

How it’s built: Regular: the infinitive diagnosticar plus the conditional endings.

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Diagnosticar in the Indicative Present Perfect

The Indicative Present Perfect of diagnosticar is used to describe actions that started recently (in the past) and are still happening now or things that have been done recently. For example, “he diagnosticado”, meaning “I have diagnosed”.

In Spanish, the Indicative Present Perfect is known as "El Pretérito Perfecto".

PronounSpanishEnglish
Yohe diagnosticadoI have diagnosed
Túhas diagnosticadoyou have diagnosed
Ella / Él / Ustedha diagnosticados/he has diagnosed
Nosotras / Nosotroshemos diagnosticadowe have diagnosed
Vosotras / Vosotroshabéis diagnosticadoyou (plural) have diagnosed
Ellas / Ellos / Ustedeshan diagnosticadothey have diagnosed

How it’s built: Haber in the present (he, has, ha, hemos, habéis, han) plus the past participle diagnosticado.

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Diagnosticar in the Indicative Past Perfect

The Indicative Past Perfect of diagnosticar is used to talk about actions that happened before another action in the past. For example, “había diagnosticado”, meaning “I had diagnosed”.

In Spanish, the Indicative Past Perfect is known as "El Pretérito Pluscuamperfecto".

PronounSpanishEnglish
Yohabía diagnosticadoI had diagnosed
Túhabías diagnosticadoyou had diagnosed
Ella / Él / Ustedhabía diagnosticados/he had diagnosed
Nosotras / Nosotroshabíamos diagnosticadowe had diagnosed
Vosotras / Vosotroshabíais diagnosticadoyou (plural) had diagnosed
Ellas / Ellos / Ustedeshabían diagnosticadothey had diagnosed

How it’s built: Haber in the imperfect (había, habías, había, habíamos, habíais, habían) plus the past participle diagnosticado.

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Diagnosticar in the Indicative Future Perfect

The Indicative Future Perfect of diagnosticar is used to talk about something that will have happened in the future after something else has already happened. For example, “habré diagnosticado”, meaning “I will have diagnosed”.

In Spanish, the Indicative Future Perfect is known as "El Futuro Perfecto".

PronounSpanishEnglish
Yohabré diagnosticadoI will have diagnosed
Túhabrás diagnosticadoyou will have diagnosed
Ella / Él / Ustedhabrá diagnosticados/he will have diagnosed
Nosotras / Nosotroshabremos diagnosticadowe will have diagnosed
Vosotras / Vosotroshabréis diagnosticadoyou (plural) will have diagnosed
Ellas / Ellos / Ustedeshabrán diagnosticadothey will have diagnosed

How it’s built: Haber in the future (habré, habrás, habrá, habremos, habréis, habrán) plus the past participle diagnosticado.

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Diagnosticar in the Indicative Conditional Perfect

The Indicative Conditional Perfect of diagnosticar is used to talk about something that would have happened in the past but didn’t due to another action. For example, “habría diagnosticado”, meaning “I would have diagnosed”.

In Spanish, the Indicative Conditional Perfect is known as "El Condicional Perfecto".

PronounSpanishEnglish
Yohabría diagnosticadoI would have diagnosed
Túhabrías diagnosticadoyou would have diagnosed
Ella / Él / Ustedhabría diagnosticados/he would have diagnosed
Nosotras / Nosotroshabríamos diagnosticadowe would have diagnosed
Vosotras / Vosotroshabríais diagnosticadoyou (plural) would have diagnosed
Ellas / Ellos / Ustedeshabrían diagnosticadothey would have diagnosed

How it’s built: Haber in the conditional (habría, habrías, habría, habríamos, habríais, habrían) plus the past participle diagnosticado.

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Subjunctive tenses of Diagnosticar

Diagnosticar in the Subjunctive Present

The Subjunctive Present is used to talk about situations of uncertainty, or emotions such as wishes, desires and hopes. It differs from the indicative mood due to the uncertainty of the events which are being spoken about. For example, “diagnostique”, meaning “I diagnose”.

In Spanish, the Subjunctive Present is known as "El Presente de Subjuntivo".

PronounSpanishEnglish
YodiagnostiqueI diagnose
Túdiagnostiquesyou diagnose
Ella / Él / Usteddiagnostiques/he diagnoses
Nosotras / Nosotrosdiagnostiquemoswe diagnose
Vosotras / Vosotrosdiagnostiquéisyou (plural) diagnose
Ellas / Ellos / Ustedesdiagnostiquenthey diagnose

How it’s built: Every form changes c to qu (diagnostique, diagnostiques, diagnostique, diagnostiquemos, diagnostiquéis, diagnostiquen).

Letters in red show where a form differs from the regular pattern.

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Diagnosticar in the Subjunctive Imperfect

The Subjunctive Imperfect is used to speak about unlikely or uncertain events in the past or to cast an opinion (emotional) about something that happened in the past. For example, “diagnosticara”, meaning “I diagnosed”.

In Spanish, the Subjunctive Imperfect is known as "El Imperfecto Subjuntivo".

PronounSpanishEnglish
YodiagnosticaraI diagnosed
Túdiagnosticarasyou diagnosed
Ella / Él / Usteddiagnosticaras/he diagnosed
Nosotras / Nosotrosdiagnosticáramoswe diagnosed
Vosotras / Vosotrosdiagnosticaraisyou (plural) diagnosed
Ellas / Ellos / Ustedesdiagnosticaranthey diagnosed

How it’s built: Regular: the ellas/ellos preterite, diagnosticaron, without -ron, plus the -ra endings; nosotros adds an accent (diagnosticáramos).

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Diagnosticar in the Subjunctive Future

The Subjunctive Future is used to speak about hypothetical situations, and actions/events that may happen in the future. For example, “diagnosticare”, meaning “I will diagnose”.

In Spanish, the Subjunctive Future is known as "El Futuro de Subjuntivo".

PronounSpanishEnglish
YodiagnosticareI will diagnose
Túdiagnosticaresyou will diagnose
Ella / Él / Usteddiagnosticares/he will diagnose
Nosotras / Nosotrosdiagnosticáremoswe will diagnose
Vosotras / Vosotrosdiagnosticareisyou (plural) will diagnose
Ellas / Ellos / Ustedesdiagnosticarenthey will diagnose

How it’s built: Regular: the ellas/ellos preterite, diagnosticaron, without -ron, plus the -re endings; nosotros adds an accent (diagnosticáremos).

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Diagnosticar in the Subjunctive Present Perfect

The Subjunctive Present Perfect is used to describe past actions or events that are still connected to the present day and to speak about an action that will have happened by a certain time in the future. For example, “haya diagnosticado”, meaning “I have diagnosed”.

In Spanish, the Subjunctive Present Perfect is known as "El Pretérito Perfecto de Subjuntivo".

PronounSpanishEnglish
Yohaya diagnosticadoI have diagnosed
Túhayas diagnosticadoyou have diagnosed
Ella / Él / Ustedhaya diagnosticados/he has diagnosed
Nosotras / Nosotroshayamos diagnosticadowe have diagnosed
Vosotras / Vosotroshayáis diagnosticadoyou (plural) have diagnosed
Ellas / Ellos / Ustedeshayan diagnosticadothey have diagnosed

How it’s built: Haber in the subjunctive present (haya, hayas, haya, hayamos, hayáis, hayan) plus the past participle diagnosticado.

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Diagnosticar in the Subjunctive Past Perfect

The Subjunctive Past Perfect is used to speak about hypothetical situations, and actions/events that occurred before other actions/events in the past. For example, “hubiera diagnosticado”, meaning “I had diagnosed”.

In Spanish, the Subjunctive Past Perfect is known as "El Pretérito Pluscuamperfecto de Subjuntivo".

PronounSpanishEnglish
Yohubiera diagnosticadoI had diagnosed
Túhubieras diagnosticadoyou had diagnosed
Ella / Él / Ustedhubiera diagnosticados/he had diagnosed
Nosotras / Nosotroshubiéramos diagnosticadowe had diagnosed
Vosotras / Vosotroshubierais diagnosticadoyou (plural) had diagnosed
Ellas / Ellos / Ustedeshubieran diagnosticadothey had diagnosed

How it’s built: Haber in the subjunctive imperfect (hubiera, hubieras, hubiera, hubiéramos, hubierais, hubieran) plus the past participle diagnosticado.

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Diagnosticar in the Subjunctive Future Perfect

The Subjunctive Future Perfect is used to speak about something that will have happened if a hypothetical situations occurs in the future. For example, “hubiere diagnosticado”, meaning “I will have diagnosed”.

In Spanish, the Subjunctive Future Perfect is known as "El Futuro Perfecto de Subjuntivo".

PronounSpanishEnglish
Yohubiere diagnosticadoI will have diagnosed
Túhubieres diagnosticadoyou will have diagnosed
Ella / Él / Ustedhubiere diagnosticados/he will have diagnosed
Nosotras / Nosotroshubiéremos diagnosticadowe will have diagnosed
Vosotras / Vosotroshubiereis diagnosticadoyou (plural) will have diagnosed
Ellas / Ellos / Ustedeshubieren diagnosticadothey will have diagnosed

How it’s built: Haber in the subjunctive future (hubiere, hubieres, hubiere, hubiéremos, hubiereis, hubieren) plus the past participle diagnosticado.

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Imperative tenses of Diagnosticar

Diagnosticar in the Imperative Affirmative

The Imperative Affirmative is used to give orders and commands, to tell someone to do something. For example, “diagnostique”, meaning “(to you formal) diagnose!”.

In Spanish, the Imperative Affirmative is known as "El Imperativo Afirmativo".

PronounSpanishEnglish
Yo--
Túdiagnostica(to you) diagnose!
Ella / Él / Usteddiagnostique(to you formal) diagnose!
Nosotras / Nosotrosdiagnostiquemoslet's diagnose!
Vosotras / Vosotrosdiagnosticad(to you plural) diagnose!
Ellas / Ellos / Ustedesdiagnostiquen(to you plural formal) diagnose!

How it’s built: Tú takes the ella/él present (diagnostica); usted, nosotros and ustedes take the subjunctive present (diagnostique, diagnostiquemos, diagnostiquen); vosotros swaps the final r of the infinitive for a d (diagnosticad).

Letters in red show where a form differs from the regular pattern.

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Diagnosticar in the Imperative Negative

The Imperative Negative is used to give orders and commands, telling someone not to do something. For example, “no diagnostique”, meaning “(to you formal) don't diagnose!”.

In Spanish, the Imperative Negative is known as "El Imperativo Negativo".

PronounSpanishEnglish
Yo--
Túno diagnostiques(to you) don't diagnose!
Ella / Él / Ustedno diagnostique(to you formal) don't diagnose!
Nosotras / Nosotrosno diagnostiquemoslet's not diagnose!
Vosotras / Vosotrosno diagnostiquéis(to you plural) don't diagnose!
Ellas / Ellos / Ustedesno diagnostiquen(to you plural formal) don't diagnose!

How it’s built: No plus the subjunctive present: no diagnostiques, no diagnostique, no diagnostiquemos, no diagnostiquéis, no diagnostiquen.

Letters in red show where a form differs from the regular pattern.

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Frequently asked questions about Diagnosticar

Is diagnosticar a regular or irregular verb?

Diagnosticar is an irregular Spanish verb. The present tense is regular. In the preterite: yo changes c to qu (diagnostiqué); the other forms are regular. It is also irregular in the present subjunctive (diagnostique).

How do you conjugate diagnosticar in the present tense (presente)?

In the present tense (presente), diagnosticar is conjugated as: yo diagnostico, tú diagnosticas, él/ella/usted diagnostica, nosotros diagnosticamos, vosotros diagnosticáis, ellos/ellas/ustedes diagnostican. The present tense is used To talk about situations, events or thoughts that are happening now or in the near future. It is also used to talk about facts and truths.

How do you conjugate diagnosticar in the preterite (pretérito indefinido)?

In the preterite (pretérito indefinido), diagnosticar is conjugated as: yo diagnostiqué, tú diagnosticaste, él/ella/usted diagnosticó, nosotros diagnosticamos, vosotros diagnosticasteis, ellos/ellas/ustedes diagnosticaron. The preterite is used To talk about actions completed in the past, at a specific point in time.

How do you conjugate diagnosticar in the imperfect (pretérito imperfecto)?

In the imperfect (pretérito imperfecto), diagnosticar is conjugated as: yo diagnosticaba, tú diagnosticabas, él/ella/usted diagnosticaba, nosotros diagnosticábamos, vosotros diagnosticabais, ellos/ellas/ustedes diagnosticaban. The imperfect is used To describe regular and repeated actions that happened in the past and descriptions of things you used to do.

How do you conjugate diagnosticar in the future tense (futuro simple)?

In the future tense (futuro simple), diagnosticar is conjugated as: yo diagnosticaré, tú diagnosticarás, él/ella/usted diagnosticará, nosotros diagnosticaremos, vosotros diagnosticaréis, ellos/ellas/ustedes diagnosticarán. The future tense is used To talk about something that will happen in the future.

How do you conjugate diagnosticar in the present subjunctive (subjuntivo presente)?

In the present subjunctive (subjuntivo presente), diagnosticar is conjugated as: yo diagnostique, tú diagnostiques, él/ella/usted diagnostique, nosotros diagnostiquemos, vosotros diagnostiquéis, ellos/ellas/ustedes diagnostiquen. The present subjunctive is used To talk about situations of uncertainty, or emotions such as wishes, desires and hopes. It differs from the indicative mood due to the uncertainty of the events which are being spoken about.


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