Concentrar means to focus or gather one's attention, effort, or resources on a particular thing or activity. It can also refer to the act of making something more intense or dense.
El Pretérito Pluscuamperfecto - used to talk about actions that happened before another action in the past
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| Pronoun | Conjugation |
|---|---|
| Yo | había concentrado |
| Tú | habías concentrado |
| Él / Ella / Usted | había concentrado |
| Nosotros / Nosotras | habíamos concentrado |
| Vosotros / Vosotras | habíais concentrado |
| Ellos / Ellas / Ustedes | habían concentrado |
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