diagnosticar Present Conjugation
diagnosticar — to diagnose
The present tense is completely regular: diagnostico, diagnosticas, diagnostica, diagnosticamos, diagnosticáis, diagnostican.
diagnosticar Present Forms
When to Use the Present
Use this for habitual actions (what a doctor does for work) or to state a diagnosis that is happening right now.
Notes on diagnosticar in the Present
This verb is fully regular in the present indicative. No spelling changes are needed here because the 'c' is followed by 'o' or 'a'.
Example Sentences
El especialista diagnostica a muchos pacientes al día.
The specialist diagnoses many patients per day.
él/ella/usted
Nosotros diagnosticamos problemas de software.
We diagnose software problems.
nosotros
¿Cómo diagnosticas tú esta situación?
How do you diagnose this situation?
tú
Common Mistakes
Mistake: diagnostico with a 'qu'
Correct: diagnostico
Why: The 'qu' change is only needed before 'e' or 'i'. Before 'o', the letter 'c' already sounds like a 'k'.
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Related Tenses
Preterite
yo: diagnostiqué
Diagnosticar is regular except for the 'yo' form, which changes to diagnostiqué.
Imperfect
yo: diagnosticaba
The imperfect is regular: diagnosticaba, diagnosticabas, diagnosticaba, diagnosticábamos, diagnosticabais, diagnosticaban.
Future
yo: diagnosticaré
The future tense is regular: add endings to the infinitive (diagnosticaré, diagnosticarás, etc.).
Conditional
yo: diagnosticaría
The conditional is regular: add -ía endings to the infinitive (diagnosticaría, diagnosticarías, etc.).
Present Subjunctive
yo: diagnostique
Diagnosticar requires a spelling change from 'c' to 'qu' in all forms: diagnostique, diagnostiques, diagnostique, etc.
Imperfect Subjunctive
yo: diagnosticara
The imperfect subjunctive follows the -ra pattern: diagnosticara, diagnosticaras, diagnosticara, etc.
Affirmative Imperative
yo: diagnostica
The imperative uses 'diagnostica' (tú) and 'diagnostique' (usted/ustedes).
Negative Imperative
yo: no diagnostiques
The negative imperative always uses the present subjunctive forms: no diagnostiques, no diagnostique, etc.