I’m sure that Mrs Smith didn’t leave home. Mrs Smith …
Mrs Smith can't have left home.
Perhaps Mr Smith murdered his wife. Mr Smith …
Mr Smith might have murdered his wife
Do your parents let you use their car? Are...?
Are you allowed to use their car?
It is not necessary to bring you parents’ permission. You …
You don't have to/ don't need to/needn't bring your parents' permission
Perhaps Penny will let us use her apartment for the party. Penny …
Penny might/may/could let us use...
I’m sure Karen is not working today. She told me she was off duty. Karen..
Karen can't be working today because she told me she was off duty
It was not a good idea to take your father’s car without his consent. You ...
You shouldn't have taken your father's car...
Is it OK for you to give me a lift?
Could/can you give me a lift?
It's compulsory for Peter to learn Spanish. Peter...
Peter has to learn Spanish
It's essential to have a visa to travel to India. You...
You have to have a visa to travel to India
I have never been to Rome. It is impossible that we met there. We..
We can't have met in Rome as I have never been there
I’m sure I left my sunglasses at the café. I
I must have left my sunglasses at the cafe
It was a bad idea to eat in this restaurant. We...
We shouldn't have eaten in this restaurant
