Possible Results:
hubiera sostenido
-I had held
Past perfect subjunctiveyoconjugation ofsostener.
hubiera sostenido
-he/she/you had held
Past perfect subjunctiveél/ella/ustedconjugation ofsostener.

sostener

Sin nosotros (todos) no se hubiera sostenido el poder de su larga dictadura.
Without all of us the power of his long dictatorship would not have been sustained.
En la otra mano no hay objeto, pero el ademán es como si hubiera sostenido algo.
There is no object in the other hand, but the gesture indicates he once held something.
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relief