I'm sure that Helen feels really lonely. Helen...
Helen must feel really lonely.
You're not allowed to park here. You...
You can't/mustn't park here.
I'm sure that Brenda isn't over thirty. Brenda...
Brenda can't be over thirty.
Do I need a different driving license for a motorbike? Do I...
Do I have to have a different driving license for a motorbike?
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.
I'm sure that David took your books by mistake. David ....
David must have taken your books by mistake.
It was a mistake to park outside the police station. You ....
You shouldn't have parked outside the police station.
Heather possibly hasn't left yet. Heather...
Heather might not have left yet.
Jack is supposed to have arrived half an hour ago. Jack ...
Jack should have arrived half an hour ago.
Perhaps Pam and Tim decided not to come. Pam and Tim ....
Pam and Tim might have decided not to come.
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.
It was a waste of time worrying, after all! You...
You needn't have worried after all!
It was very wrong of you to take my car without asking. You...
You shouldn't have taken my car without asking.
Maybe Tom is looking for a new place to live. Tom...
Tom could be looking for a new place to live.
Why aren't you at home revising for your exam? You...
You should be revising for your exam at home now.
Students are not allowed to leave the classroom. Students...
Students mustn't/can't leave the classroom.
