previously◼◼◼(at an earlier time) adverb [UK: ˈpriː.vɪə.sli] [US: ˈpriː.viə.sli]I previously worked as a translator. = J'ai travaillé auparavant comme traducteur.
formerly◼◼◼(at some time in the past) adverb [UK: ˈfɔː.mə.li] [US: ˈfɔːr.mər.li]She was formerly a bank clerk. = Elle était auparavant employée de banque.
beforehand◼◼◻(at an earlier time) adverb [UK: bɪ.ˈfɔː.hænd] [US: bɪ.ˈfɔːr.hænd]I'll ring you beforehand. = Je vous téléphonerai auparavant.