[{"role": "user", "content": "I'm trying to learn Italian and I came across the sentence 'You know that.' Can you help me translate it?"}, {"role": "assistant", "content": "Certo! The translation of 'You know that' in Italian is 'Lo sai'."}, {"role": "user", "content": "Grazie! What does 'lo sai' literally mean? Is it a formal or informal way of speaking?"}, {"role": "assistant", "content": "'Lo sai' is the second person singular form of the verb'sapere', which means 'to know'. 'Lo' is a masculine direct object pronoun, and'sai' is the second person singular conjugation of'sapere'. It's an informal way of speaking, typically used with friends, family, or people you're familiar with."}, {"role": "user", "content": "That's really helpful. What's the formal version then?"}, {"role": "assistant", "content": "The formal version of 'You know that' in Italian would be 'Lo sa'. The difference is in the verb conjugation, where'sa' is the formal second person singular form of'sapere'. You would use this when speaking to someone you don't know well, or to show respect, such as when addressing an older person or a person in a position of authority."}]