Answer:
The correct conjugation of the verb is:
<em>Nosotros habíamos prevenido</em>
Explanation:
The past perfect tense consists in using the following combination:
<em>Pronoun + "Haber" in imperfect past tense + The verb in perfect past tense</em>
The correct conjugation of the verb is:
<em>Nosotros habíamos prevenido</em>
Here is an example just for fun:
<em>Nosotros habíamos prevenido al Señor de Guayas del regreso de la Crustácea.</em>
