O Condicional Perfeito (Conditional Perfect ou Past Conditional), responde à pergunta: What would have happened? = O que teria passado? Ou What would have been happening? = O que teria estado passando? Forma-se: Sujeito + would + have + particípio (I would have worked). Sujeito + would + have been + particípio (I would have been working).
• Sujeito + would + have + particípio (I would have worked).
• Sujeito + would + have been + particípio (I would have been working).