Spanish Past Conditional
El Condicional Perfecto also known as El Condicional Compuesto and El Antepospretérito
El Condicional Perfecto is the past tense of the conditional mood, which expresses actions that would have or might have happened in the past. It's about missed opportunities and unrealized potential.
In English the past conditional is formed with ''would have'' + the past participle of the main verb, while in Spanish it is formed like this:
haber in El Condicional Simple + the past participle of the main verb
El habría venido a casa antes si no hubiera llovido.He would have come home earlier if it had not rained.
See also: Spanish Past Tenses and All Spanish Tenses