0 used with a verb to make the infinitive -- usato con un verbo per formare l’infinito
1 used to give the reason for doing something -- per
I’m just going out to get some milk. Esco un attimo a prendere il latte.
2 in the direction of something -- a, in direzione di
3 used to show who gets something -- a
Could you give these keys to Pete? Puoi dare queste chiavi a Pete?
4 used to give information about periods of time and distances -- da… a…
5 used to say ‘before’ the hour when you are saying what time it is -- a
It’s five to three. Mancano cinque minuti alle tre.