. Choose the most likely explanation for each sentence.
(??)Megan should get good results in her exams.
(?) Megan has an obligation to get good results in her exams.
(?)It is probable Megan will get good results in her exams.
(??)I couldn’t swim until I was 16 years old.
(?)I didn’t have permission to swim until I 16 years old.
(!)I didn’t have the ability to swim until I 16 years old.
(??)Passengers may smoke once the plane is a
(?)There is a possibility that passengers will once the plane is airborne.
(?)Passengers have permission to smoke on plane is airborne.
(??)No one can smoke on the London Underj
(?)No one has the ability to smoke on the London Underground.
(?)No one has permission to smoke on the London Underground.
(??)You should wear glasses.
(?)My advice is that you wear glasses.
(?)There is a probability that you will have to wear glasses.
(??)Will you answer the door?
(?)Are you at some time in the future going to answer the door?
(?)I’m asking you to answer the door.
(??)I couldn’t get the top off the bottle.
(?)I did not have permission to get the top off t bottle.
(?)I did not manage to get the top off the bottle.
(??)You must be tired.
(?)I am sure you are tired.
(?)I order you to be tired.
(??)Andrew’s got a meeting after work so he may not go to the party.
(?)Andrew does not have permission to go to the party.
(?)There’s a possibility Andrew won’t go to the party.
(??)You needn’t have given me a lift.
(?)You gave me a lift. This was very kind but not necessary.
(?)You didn’t give me a lift because it wasn’t necessary.
(??)You might have helped to clear up after the party.
(?)I’m angry because I think you ought to have helped clear up.
(?)I think that there’s just a possibility that you helped to clear up.