|hablar to speak|
|yo hubiera hablado||nosotros/as hubiéramos hablado|
|tú hubieras hablado|
|él/ella/usted hubiera hablado
||ellos/as/ustedes hubieran hablado|
The pluperfect subjunctive (pluscuamperfecto subjuntivo) is formed with:Ella hubiera sido mejor presidenta yo creo que la otra muchacha.
She would have been a better president than the other girl, I think.
The pluperfect subjunctive is normally used in dependent clauses that describe an action which precedes the action of a main clause in the past tense. The pluperfect subjunctive is introduced by the same kinds of clauses that introduce the past subjunctive. The past subjunctive, on the other hand, indicates a simultaneous action or a future action in relation to a main clause in the past tense.
Me molestó que no me hubieras comprado un regalo de cumpleaños.It bothered me that you did not buy me a birthday present.
Si hubiera estudiado más, habría sacado notas mejores.If I had studied more, I would have got better grades.
Si hubiera estudiado más, ahora tendría un trabajo mejor.If I had studied more, I would have a better job now.
However, in spoken Spanish, the past conditional or the simple conditional are often replaced by the pluperfect subjunctive for this kind of hypothetical clauses. The resulting structure would be in such cases a sentence containing two pluperfect subjunctive verbs.Si yo te hubiera dicho que no hablo inglés, me hubieras despedido.
If I had told you that I do not speak English, you would have fired me.
For more details about hypothetical clauses see also the page about si clauses.
For more uses of this tense see also the page about tense sequences.