Final answer:
The pluperfect conjugation of 'haber' includes 'había', 'habías', 'había', 'habíamos', 'habíais', and 'habían' for the different subject pronouns. It is used with a past participle to indicate an action that had occurred before another past event.
Step-by-step explanation:
Conjugation of Haber in the Pluperfect Tense
The conjugation for the verb haber in the pluperfect tense depends on the subject pronoun used. The pluperfect is also known as the past perfect tense, and it expresses an action that had occurred before another action in the past. To form the pluperfect tense, you use the imperfect tense of 'haber' plus the past participle of the main verb. Here are the conjugations for 'haber' in the pluperfect tense:
yo había
tú habías
él/ella/usted había
nosotros/nosotras habíamos
vosotros/vosotras habíais
ellos/ellas/ustedes habían
For example, 'Yo había terminado mis deberes antes de cenar' translates to 'I had finished my homework before dinner.' Note that the past participle is generally formed by adding -ado to -ar verbs and -ido to -er and -ir verbs, with some irregulars such as 'hecho' for 'hacer' and 'visto' for 'ver'.