I'm sure that Liz hasn't met Harry before. Liz ...
Liz can't have met Harry before.
It was a mistake to park outside the police station. You ....
You shouldn't have parked outside the police station.
I couldn't be happier at the moment! I ....
I am as happy as could be at the moment!
Perhaps Pam and Tim decided not to come. Pam and Tim ....
Pam and Tim might have decided not to come.
I'm sure that David took your books by mistake. David ....
David must have taken your books by mistake.
It was a waste of time worrying, after all! You ....
You needn't have worried after all!
It would be a great idea if Harry took a holiday. Harry ....
Harry should take a holiday.
I'm sure that Helen feels lonely. Helen.....
Helen must feel really lonely.
Although it's summer, the temperature is more like winter. It ...
It may be summer, but the temperature is more like winter.
It was unnecessary for you to clean the floor. You....
You needn't have cleaned the floor.
The dentist will see you soon. I don't think he'll be long. // The dentist will see you soon. He .....
He shouldn't be long.
I'm sure that Peter won't be late. Peter ...
Peter is bound to be on time.
You're not allowed to park here. You .........
You can't / mustn't park here.
Jack is supposed to have arrived half an hour ago. Jack ...
Jack should have arrived half an hour ago.
You needn't come with me if you don't want to. You .....
You don't have to come with me if you don't want to.
It's possible for anyone to break into this house! Anybody .....
Anybody can / could break into this house!
I'm sure they haven't eaten all the food. It's not possible! They ....
They can't have eaten all the food.
I think it was the cat that took the fish from the table! The cat .....
The cat must have taken the fish from the table.
I'm sure that Brenda isn't over thirty. Brenda.....
Brenda can't be over thirty.
I'm sure this isn't how you get to Bakio. This .....
This can't be the way to Bakio.
Heather possibly hasn't left yet. Heather...
Heather might not have left yet.