For the past perfect subjunctive the auxiliary verb is used with a past participle. Both the -ra and -se forms can be used.
yo hubiera hablado
I had talked
tú hubieras hablado
you had talked
él/ella/usted hubiera hablado
he/she/you had talked
nosotros hubiéramos hablado
we had talked
vosotros hubierais hablado
you had talked
ellos/ellas/ustedes hubieran hablado
they/you had talked
yo hubiese hablado
I had talked
tú hubieses hablado
you had talked
él/ella/usted hubiese hablado
he/she/you had talked
nosotros hubiésemos hablado
we had talked
vosotros hubieseis hablado
you had talked
ellos/ellas/ustedes hubiesen hablado
they/you had talked
yo hubiera servido
I had served
tú hubieras servido
you had served
él/ella/usted hubiera servido
he/she/you had served
nosotros hubiéramos servido
we had served
vosotros hubierais servido
you had served
ellos/ellas/ustedes hubieran servido
they/you had served
yo hubiese servido
I had served
tú hubieses servido
you had served
él/ella/usted hubiese servido
he/she/you had served
nosotros hubiésemos servido
we had served
vosotros hubieseis servido
you had served
ellos/ellas/ustedes hubiesen servido
they/you had served
1. This tense is used to indicate an action prior to the main verb when the verb is in preterit, imperfect or pluperfect.
- Sentia pena de que se hubieran ido solitos. (I felt ashamed/worried that they went on their own.)
2. It is used to in the si-clause if the sentence is expressing conditions contrary to the past.
- Si yo no hubiera tenido ese dinero, no se que hubiera hecho.
3. It is used with “ojala” to describe wishes of the past.
- Ojala te hubiera visto. (I wish I would have seen you.)