Third Conditional

We use If + Past perfect + Would have + Past participle to talk hypothetically about things that went unreal and had imaginary results.
- If I had kept that job, I wouldn't have spent some time with my family.
- If I hadn't come to Italy, I wouldn't have met you, baby !
- If I had finished my report yesterday, I wouldn't have been here today.
We can use might have or could have instead of "would have", if we want to indicate possibility.
- If Emily had studied harder, she might have passed all her exams.
- If I had seen her, I could have asked her out.