Condicional: Faria, Gostaria, Poderia

The condicional (would) adds -ia, -ias, -ia, -íamos, -iam to the whole infinitive: gostar → gostaria, viver → viveria, ir → iríamos. Three verbs shorten the stem: fazer → faria, dizer → diria, trazer → traria.

Use it for:

• polite wishes: Eu gostaria de reservar uma mesa (I would like to book a table)
• hypotheses, often after se + imperfect subjunctive or no teu lugar: Se tivesse tempo, poderia ajudar-te (If I had time, I could help you)
• the future seen from the past: Ela disse que traria o vinho (She said she would bring the wine)

In everyday European Portuguese the imperfeito very often replaces it (gostava, fazia, podia), and ia + infinitive is common for results and for the future in the past (ia ficar triste, disse que ia trazer). All are correct.