Dear 1st batxillerat students,
Here are the answer keys to the exercises on modals I gave you for further practice:
REVISION
MODALS: ABILITY
1)1. could 2. be able to 3. been able to 4. could
5. won't be able to 6. can you 7. couldn't
MODALS: OBLIGATION, ADVICE AND PROHIBITION
2) 1. don't have to 2. shouldn't 3. don't have to
4. ought 5. mustn't 6. shouldn't
7.shouldn't 8. don't have to 9. doesn't have to
MODALS: POSSIBILITY AND CERTAINTY
3) 1. Jane could visit Switzerland next year.
2. I may take Spanish lessons.
3. They must be home by now.
4. James can't be eighteen yet!
4) 1. Mrs Smith can't have left home.
2. She might have gone to stay with her mother.
3. He must have buried something in the garden.
4. He could have won the lottery and bought a new car.
5. Mr Smith might have murdered his wife.
EXTENSION
MODALS: ABILITY AND OBLIGATION
1) 1. was able to 2. couldn't 3. had to 4. had to
5. don't have to 6. have to 7. have to 8. can't
9. mustn't 10. have to
MODALS: OBLIGATION, ADVICE AND PROHIBITION
2) 1. needn't work so hard 2. shouldn't stay out so late,
should be quieter
3. shouldn't / needn't do the washing up 4. needn't feed the cat
5. shouldn't spend so much 6. needn't come to my party
MODALS: POSSIBILITY AND CERTAINTY
3) 1. He might have missed the last train
2. They could have gone to the cinema.
3. She can't have spent it already!
4. He may have forgotten about the match.
5. He couldn't have done it without Steve's help.
4) 1. can't believe 2. couldn't understand 3. will be able to speak
4. have to do 5. don't have to come 6. shouldn't smoke
7. could be 8. must have forgotten
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