[{"role": "user", "content": "I'm trying to learn Italian and I'm stuck on the sentence 'Who hired Tom?'. Can you help me translate it?"}, {"role": "assistant", "content": "Certo! The translation of 'Who hired Tom?' in Italian is 'Chi ha assunto Tom?'"}, {"role": "user", "content": "That's really helpful, grazie mille! What's the difference between 'ha assunto' and just 'assunto'?"}, {"role": "assistant", "content": "In Italian, 'ha assunto' is the correct form to use in this sentence because 'ha' is the third person singular of the auxiliary verb 'avere', which is used with the verb 'assumere' (to hire) in the present perfect tense. So 'ha assunto' means 'has hired'."}]