The Conditional Perfect Tense translates as I would have done something. It is formed by using the conditional tense of the verb HABER (to have done something) + Past Participle.
The Past Participle is formed by removing the AR from the infinitive and adding ADO e.g.Habría hablado – I would have spoken.
The Past Participle is formed by removing the ER or IR from the infinitive and adding IDO e.g. Habría comido – I would have eaten.