He sold the car. (Certainty)
He must have sold the car
You paid with your credit card. (Certainty)
You must have paid with your credit card
We passed the driving test. (Possibility)
We might/could/may have passed the driving test
You didn't see her. (Possibility)
You couldn't have seen her
He fell in love with her. (Possibility)
He could / might / may have fallen in love with her
She was at home. (Certainty)
She must have been at home
He took the last flight. (Regret affirmative)
He should have taken the last flight
I waited more hours. (Possibility)
I could/might /may waited more hours
I went there. (Regret negative).
I shouldn't have gone there
He gave me the wrong number. (Possibility)
He might/ could / may have given me the wrong number
I brought enough money. (Regret affirmative)
I should have brought enough money
She was asleep. (Certainty)
She must have been asleep
I made a backup. (Regret affirmative)
I should have made a backup