One way to get someone’s attention is to use the imperative command form of a verb. Two useful verbs for this purpose are ascoltare (to listen) and sentire (to hear). In Italian it’s important to know to whom you are giving the command; this will determine both the word choice and its conjugation.
Commissioner Manara has a familiar relationship with Lara and uses the informal form of address: He’s getting her attention by saying ascolta (listen). There’s a slight urgency with ascolta.
Ascolta Lara, a volte bisogna prendere delle scorciatoie, no?
Listen Lara, sometimes you have to take shortcuts, right?
Caption 36, Il Commissario Manara - S1EP5 - Il Raggio VerdePlay Caption
In the next example, there’s a bit of urgency, but this is Manara’s boss talking to him. They use the polite or formal form of address:
Manara, mi ascolti bene.
Manara, listen to me carefully.
Caption 23, Il Commissario Manara - S1EP1 - Un delitto perfettoPlay Caption
Note that the imperative verb can stand alone, or be paired with an object personal pronoun as in the above example. It adds to the urgency, and makes it more personal. Manara’s boss could have added mi raccomando (make sure) for extra urgency:
Manara, mi ascolti bene, mi raccomando!
This next example is between two people who really don’t know each other at all. It’s a formal situation, so the Lei form of “you” is used. Senta is more passive and less intrusive than ascolti. In fact, it means “hear” or “listen,” but is actually a way of saying “excuse me.”
Senta signora, oltre a Lei, chi lo sapeva di queste lettere?
Excuse me ma'am, other than you, who knew about these letters?
Caption 64, Il Commissario Manara - S1EP4 - Le Lettere Di LeopardiPlay Caption
Senta (listen, excuse me, or hear me) is a command you’ll use in a restaurant when wishing to get the attention of the cameriere (waiter).
Senta, possiamo ordinare?
Excuse me, may we order?
Often, senta (listen) goes hand in hand with scusi (excuse me), to be extra polite.
Buonasera. Senta scusi, Lei conosceva il dottor Lenni, giusto?
Good evening. Listen, excuse me. You knew Doctor Lenni, right?
Caption 4, Il Commissario Manara - S1EP1 - Un delitto perfettoPlay Caption
And in a familiar situation, such as between Marika and the mozzarella vendor in Rome, there’s no urgency but Marika wants to get the vendor’s attention before asking her a question.
Senti, ma quante mozzarelle dobbiamo comprare per la nostra cena?
Listen, but how many mozzarellas should we buy for our dinner?
Caption 50, Anna e Marika - La mozzarella di bufala - La produzione e i tagliPlay Caption
In the next example, the speaker could have said, Ascolta, Adriano, and it would have meant the same thing. Personal preference and regional usage often account for the difference.
Senti, Adriano, io lavoro qui da quando avevo dodici anni.
Listen Adriano, I've been working here since I was twelve years old.
Caption 37, Adriano Olivetti - La forza di un sogno Ep.2Play Caption
Without necessarily studying all the conjugations of sentire and scusare, it’s a good idea to just remember that in polite speech, the imperative has an “a” at the end of senta, but an “i” at the end of scusi. The familiar command form would be senti, scusa. These endings can be tricky for beginners because they seem wrong, being the opposite of the indicative endings. It’s quite easy to get mixed up. The command form originally comes from the subjunctive, which is why it has a different, special conjugation.
Getting someone’s attention is part of the basic toolkit you need to communicate in Italian, so why not practice a bit, in your mind? Look at someone and get their attention using the correct verb and correct form.
If you don’t know the person, or you address them formally for some other reason, you use:
Senta! Senta, scusi.
Senta, mi scusi.
[Mi] ascolti. (Not so common, and a bit aggressive, useful if you’re a boss.)
If you’re trying to get the attention of a friend, you’ll use:
Senti... (It’s almost like saying, “Hey...”)
Ascoltami... (This can be aggressive or intimate depending on the tone and the context.)
Learn more about the imperative in Italian here.