had been revolving
-había estado girando
Past perfect progressiveconjugation ofrevolve.There are other translations for this conjugation.

revolve

It gave him little surprise, however; for he had been revolving in his mind a change of life, and thought and hoped he saw his new-born resolutions carried out in this.
Ello le sorprendió poco, sin embargo, pues había resuelto cambiar de vida: y pensaba y esperaba que su ausencia era una prueba de que sus nacientes resoluciones empezaban a ponerse en práctica.
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