In English, we can say By tonight I will have already cooked. In Italian, you do pretty much the same thing!
First, take the future form of avere.
| avere to have |
|
|---|---|
| io I |
avrò (I) will have |
| tu you |
avrai (you) will have |
| lui / lei he / she |
avrà (he / she) will have |
| noi we |
avremo (we) will have |
| voi you all |
avrete (you all) will have |
| loro they |
avranno (they) will have |
Then, change the ending on the following verb to ‑ato, ‑uto, or ‑ito.
Per stasera avrò già cucinato.
By tonight I will have already cooked.
Non avrai creduto alle sue parole.
You will not have believed his words.
Per domani avremo seguito tutti i corsi.
By tomorrow we will have attended all the courses.
Usually, you’ll use ‑ato for verbs that end in ‑are, ‑uto for ‑ere verbs, and ‑ito for ‑ire verbs.
For some verbs that talk about motion (like venire and andare), you’ll use the future of essere instead of avere.
Sarà andato via prima di te.
He will have gone away before you.
Domani sarò arrivato.
Tomorrow I will have arrived.
Verbs that include extra little words also use essere in these cases.
Non ti sarai sentito solo?
Won't you have felt lonely?
Si sarà ricordato di lei?
Will he have remembered her?