Avançado
Condicional tipo 3 e mista
A regra
Para um passado que não aconteceu: if + had + particípio, e would have + particípio. Na mista, o passado imaginado muda o presente: would + verbo.
Como se forma
If + had + participle, would have + participle
If you had told me, I would have helped.
Se você tivesse me contado, eu teria ajudado.
wouldn't have + participle
We wouldn't have missed the flight if we had left earlier.
Não teríamos perdido o voo se tivéssemos saído mais cedo.
mixed: If + had + participle, would + verb (now)
If I had studied medicine, I would be a doctor now.
Se eu tivesse estudado medicina, seria médico agora.
Erros comuns
If I would have known, I would have come.If I had known, I would have come.
Depois de if, use had + particípio, não would have.
If she had left earlier, she would catch the train.If she had left earlier, she would have caught the train.
Resultado também no passado: would have + particípio.
I would have went with you.I would have gone with you.
Depois de would have vem o particípio (gone).