This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
No me concentro bien con tanto ruido.
I can't concentrate well with so much noise.
ImperfectPretérito imperfecto
Antes te concentrabas mejor en la biblioteca.
You used to concentrate better in the library.
ConditionalCondicional
Con menos ruido, me concentraría mucho mejor.
With less noise, I would concentrate much better.