THIRD CONDITIONAL
Third Conditional: (if + past perfect, ... would + have + past participle) It talks about the past. It's used to describe a situation that didn't happen, and to imagine the result of this situation. If she had studied , she would have passed the exam (but, really we know she didn't study and so she didn't pass) If I hadn't eaten so much, I wouldn't have felt sick (but I did eat a lot, and so I did feel sick). If we had taken a taxi, we wouldn't have missed the plane She wouldn't have been tired if she had gone to bed earlier She would have become a teacher if she had gone to university He would have been on time for the interview if he had left the house at nine (Notice we can put 'if' at the beginning, or in the middle. It doesn't matter at all.)