Learn Italian: È importante che l'attrice dia qualcosa di speciale mentre si esibisce. - It is important that the actress gives something special while she performs.

Dia is the present subjunctive form of the irregular verb dare (to give) for the lei (she) form. We must use the subjunctive mood here because the sentence begins with the impersonal expression È importante che (It is important that), which expresses a necessity or opinion and triggers the subjunctive.

How does the irregular verb dare conjugate in the rest of the present subjunctive?

Like many irregular verbs in the present subjunctive, the singular forms are all identical. The forms for io, tu, and lui/lei are all dia. The plural forms are diamo (we), diate (you all), and diano (they).

Why is there a di between qualcosa and speciale?

In Italian, when you follow an indefinite pronoun like qualcosa (something) or niente (nothing) with an adjective, you have to connect them with the preposition di. While in English we say "something special", the Italian structure is literally "something of special" (qualcosa di speciale).

Since the sentence uses the subjunctive, why is si esibisce in the regular present tense?