MODAL CORRECTION

1. It’s possible that Jane will visit Switzerland next year. (could)
Jane could visit Switzerland next year
2. I’m thinking about taking Spanish lessons. (may)
I may take Spanish lessons
3. I’m sure they’ll be home by now. (must)
They must be home by now
4. James definitely isn’t eighteen yet! (can’t)
James can't be eighteen
5. It’s possible the weather will be sunny tomorrow. (might)
It may be sunny tomorrow
6. I’m sure that Mrs Smith didn’t leave home. (can’t)
Mrs Smith can't have left home
7. Perhaps she’s gone to stay with her mother. (might)
She might have gone to stay with her mother
8. It’s possible that Mr Smith committed a crime. (may)
Mr Smith may have committed a crime
9. I’m certain that he buried something in the garden. (must)
He must have buried something in the garden
10. Perhaps he won the lottery. (could)
He could win the lottery
11. I’m sure he bought a new car. (must)
He must have bought a new car
12. Perhaps Mr Smith murdered his wife. (might)
Mr Smith might have murdered his wife
13. I'm sure she's at home. (must)
She must be home
14. I know that isn't Janet-She's in America. (can’t)
That can't be Janet
15. I'm sure she thinks I'm stupid. (must)
She must think I'm stupid
16. I bet I look silly in this coat. (must)
I must look silly in this coat
17. They're always buying new cars. I'm certain they have a lot of money. (must)
They must have a lot of money
18. I'm sure he's not a teacher. He's too well dressed. (can’t)
He can't be a teacher
19. You're an architect? I'm sure that's an interesting job. (must)
An architect must be an interesting job
20. I'm sure you're not serious. I know you're joking. (must)
You must be joking
I'm sure he's got another woman. He keeps coming home late. (must)
He must have another woman
22. This water is possibly dangerous. (could)
The water could be dangerous
Politics is sometimes really boring. (can)
Politics can sometimes be boring

2. Rewrite the sentences using a modal verb.
1. It isn’t necessary for you to take a jacket.
2. I advise you to see a dentist.
3. You aren’t allowed to talk during the exam.
4. It’s forbidden to park here.
5. I advise you to study harder.
He is obliged to go to the police station twice a week.
7. Tom knows how to speak Spanish.
8. He had permission to go to the party.
9. It isn’t possible that that is our plane.
10. It isn’t necessary to take a thick coat.
11. I wish I had paid for half of the meal, but I didn’t.
12. It was wrong of Mary to tell Steve about us.
13. Perhaps Anita didn’t get the text message.
14. It’s possible that they went to the cinema.
15. It wasn’t a good idea to ask the other couple to come with us.
16. I am certain you haven’t seen John because he is on a trip.
You…
17. It is possible that Jake is in his room.
Jake…
18. Perhaps we will not see them at the weekend.
We…
19. I don’t know if I will go to the concert.
I may go to the concert
20. They are certain that bringing up children is not easy.
Bringing up children can't be easy
21. It is unnecessary for you to come.
You needn't come
22. I advise him to give up smoking.
He should give up smoking
23. Eating chewing-gum in the class in prohibited.
Students mustn't eat chewing gum in the class
24. There was an obligation to turn off the mobile phone.
We had to turn off mobile phones
25. I didn’t have the ability to cook when I was younger.
I couldn't cook when I was younger