It _____ _____ _____ her that you saw; she's away on vacation.
It couldn't have been her that you saw; she's away on vacation.
Why is she late? She _____ _____ _____ stuck in traffic.
Why is she late? She must have gotten stuck in traffic.
Wow, that _____ _____ _____ !
Wow, that must have hurt!
I really _____ _____ _____ so much.
I really shouldn't have eaten so much.
I _____ _____ _____ too much last night.
I must have drunk too much last night.
You _____ _____ _____ the movie.
You wouldn't have liked the movie.
He wasn't at the meeting. Could he _____ _____ _____ it?
Could he have forgotten about the meeting?
I'm not sure, but I _____ _____ _____ my wallet.
I'm not sure, but I may/might have lost my wallet.
When I was a child, I should have __________.
When I was a child, I should have __________.
They _____ _____ had a great time.
They must have had a great time.
Where _____ _____ _____ _____?
Where could it have gone?
He _____ _____ _____ to impress her.
He must have wanted to impress her.
How _____ I _____ _____ so stupid?
How could I have been so stupid?
She _____ _____ called first.
She could/should have called first.
I guess he must _____ _____ _____ for his flight.
I guess he must have been late for his flight.
I _____ _____ _____ to the party, but I was too busy.
I would have gone to the party, but I was too busy.
When I was at university, I shouldn't have __________.
When I was at university, I shouldn't have __________.
She _____ _____ _____ yes, but she wasn't ready to get married.
She could have said yes, but she wasn't ready to get married.