have been redeveloping
Present perfect progressiveconjugation ofredevelop.There are other translations for this conjugation.

redevelop

In the past few months, we have been redeveloping and redesigning the program–together with you–to create the world's best slideshow software. See for yourself.
En los últimos meses hemos estado trabajando en el programa, continuando su desarrollo en colaboración con nuestros usuarios para obtener el que muchos consideran el mejor programa del mundo para crear presentaciones fotográficas.
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