What Would Have Happened
Third Conditional
The third, or 'past', conditional is used to imagine past outcomes different than what actually took place. This conditional is used to express what would have been different if a person had done something differently.
'If' clause - past perfect + , + result clause - would + have + verb (conditional perfect tense)
Examples of Past Unreal Outcomes
Where would you have shopped for meals if you'd wanted to cook three meals per day?
"If they had known our recipe costing formula, they would have implemented it."
She would have sold the luxury properties if the economy had continued to grow.
Where would you have eaten if you had wanted gourmet-type dining?
Do not use a comma, when placing the result clause first.
She would have prepared desserts if Susan had thrown the party.
She would have trained as a food service professional if she had got the job.