之前 /ʈʂʰwəɪ tɕʰjɛn/ AdverbEnglishpreviouslyItalianoprima / precedentementeExample这座楼房先前曾被用作酒店。(先前 曾被用作酒店)The building had previously been used as a hotel.“先前”强调时间点,语气比“以前”更正式。