Short answer : The three phrases worth learning before anything else are por favor (please), obrigado if you are a man or obrigada if you are a woman (thank you), and socorro (help!) if you are ever in trouble. With bom dia, desculpe and não percebo, you can handle most first encounters politely which, in Lisbon, is the thing people notice first. This guide covers 50 phrases grouped by the situations new residents meet first: cafés and restaurants, shops, public transport, admin and housing, greetings and small talk, and asking for help when your Portuguese runs out.