The Perfect Tenses

The "perfect tenses" are formed using the formula below:

conjugation of haber + the past participle = perfect tenses

The past participle is formed by adding the suffix (ado) to (ar) verbs and (ido) to (er) and (ir) verbs. Here are some examples:

ar verbs
hablar ---> hablado (spoken)

er and ir verbs
comer ---> comido (eaten)

Any tense of haber can be used to form a perfect tense. See the examples below:

Yo digo que ella lo ha hecho.
I say that she has done it.

Ya hemos visto la película.
We've already seen the film.

Juan dijo que había viajado a México.
John said that he had traveled to Mexico.

Juan habrá salido para las ocho.
Juan will have left by eight o'clock.

Todos habrán terminado la composición para mañana.
Everyone will have finished their compositions by tomorrow.