Concentrarse means ‘to concentrate’. It is a regular reflexive -ar verb: me concentro (present), me concentré (preterite), concentrado (past participle), concentrándose (gerund).
Concentrarse in use
Me concentro mejor por la mañanaI concentrate better in the morning
Se concentra en sus estudiosShe concentrates on her studies
Concentrarse en el trabajoTo concentrate on work
On this pageIndicative
Indicative
Statements of fact, certainty and objective reality
ending the ending you addstem letters that changehaber auxiliary
The other perfect tenses (haber + past participle) and the past subjunctive
The imperfect subjunctive has two forms: -ra (more common in speech) and -se (more formal; still heard in speech in Spain, mainly written in Latin America). Both are equally correct and interchangeable.
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